/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-zilu/benchmark37_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:03:21,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:03:21,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:03:21,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 04:03:21,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:03:21,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:03:21,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:03:21,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:03:21,551 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:03:21,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:03:21,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:03:21,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:03:21,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:03:21,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:03:21,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:03:21,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:03:21,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:03:21,554 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:03:21,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:03:21,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:03:21,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:03:21,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:03:21,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:03:21,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:03:21,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:03:21,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:03:21,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:03:21,556 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:03:21,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:03:21,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:03:21,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:03:21,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:03:21,830 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:03:21,831 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:03:21,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark37_conjunctive.i [2022-02-24 04:03:21,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95e3eb56c/4422b27024bb497f8727e2c307f57abb/FLAG41fe5070e [2022-02-24 04:03:22,319 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:03:22,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark37_conjunctive.i [2022-02-24 04:03:22,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95e3eb56c/4422b27024bb497f8727e2c307f57abb/FLAG41fe5070e [2022-02-24 04:03:22,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95e3eb56c/4422b27024bb497f8727e2c307f57abb [2022-02-24 04:03:22,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:03:22,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:03:22,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:03:22,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:03:22,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:03:22,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2411c66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22, skipping insertion in model container [2022-02-24 04:03:22,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:03:22,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:03:22,892 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-zilu/benchmark37_conjunctive.i[873,886] [2022-02-24 04:03:22,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:03:22,906 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:03:22,917 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-zilu/benchmark37_conjunctive.i[873,886] [2022-02-24 04:03:22,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:03:22,935 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:03:22,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22 WrapperNode [2022-02-24 04:03:22,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:03:22,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:03:22,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:03:22,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:03:22,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:03:22,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:03:22,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:03:22,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:03:22,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22" (1/1) ... [2022-02-24 04:03:22,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:03:22,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:03:22,988 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) [2022-02-24 04:03:22,998 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 [2022-02-24 04:03:23,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:03:23,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:03:23,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:03:23,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 04:03:23,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:03:23,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:03:23,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 04:03:23,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 04:03:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:03:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:03:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:03:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-02-24 04:03:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 04:03:23,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:03:23,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:03:23,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:03:23,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:03:23,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:03:23,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:03:23,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:03:23,084 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:03:23,085 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:03:23,221 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:03:23,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:03:23,228 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:03:23,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:03:23 BoogieIcfgContainer [2022-02-24 04:03:23,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:03:23,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:03:23,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:03:23,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:03:23,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:03:22" (1/3) ... [2022-02-24 04:03:23,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165aaaaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:03:23, skipping insertion in model container [2022-02-24 04:03:23,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:03:22" (2/3) ... [2022-02-24 04:03:23,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165aaaaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:03:23, skipping insertion in model container [2022-02-24 04:03:23,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:03:23" (3/3) ... [2022-02-24 04:03:23,251 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark37_conjunctive.i [2022-02-24 04:03:23,262 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:03:23,262 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:03:23,337 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:03:23,342 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=QVASR [2022-02-24 04:03:23,343 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:03:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 04:03:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 04:03:23,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:23,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:23,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:23,386 INFO L85 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2022-02-24 04:03:23,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:23,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047838719] [2022-02-24 04:03:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:23,457 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:03:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:23,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:23,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:23,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047838719] [2022-02-24 04:03:23,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2047838719] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:23,696 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:23,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:03:23,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696870677] [2022-02-24 04:03:23,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:23,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:03:23,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:23,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:03:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:03:23,734 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:23,894 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-02-24 04:03:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:03:23,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 04:03:23,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:23,905 INFO L225 Difference]: With dead ends: 41 [2022-02-24 04:03:23,905 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 04:03:23,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:03:23,914 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:23,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 04:03:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 04:03:23,949 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) [2022-02-24 04:03:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-24 04:03:23,951 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-02-24 04:03:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:23,952 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-24 04:03:23,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-24 04:03:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-24 04:03:23,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:23,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:23,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:03:23,955 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2022-02-24 04:03:23,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:23,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799773330] [2022-02-24 04:03:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:23,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:26,514 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:26,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:26,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:26,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799773330] [2022-02-24 04:03:26,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1799773330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:26,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:26,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 04:03:26,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468284121] [2022-02-24 04:03:26,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:26,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 04:03:26,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 04:03:26,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 04:03:26,626 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 5 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) [2022-02-24 04:03:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:26,715 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-02-24 04:03:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:03:26,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 5 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 [2022-02-24 04:03:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:26,717 INFO L225 Difference]: With dead ends: 20 [2022-02-24 04:03:26,717 INFO L226 Difference]: Without dead ends: 15 [2022-02-24 04:03:26,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:03:26,723 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:26,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:26,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-24 04:03:26,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-24 04:03:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-02-24 04:03:26,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-02-24 04:03:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:26,736 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-02-24 04:03:26,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 5 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) [2022-02-24 04:03:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-02-24 04:03:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 04:03:26,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:26,737 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:26,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:03:26,737 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 2 times [2022-02-24 04:03:26,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:26,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570296271] [2022-02-24 04:03:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:26,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:27,055 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:27,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:27,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:27,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570296271] [2022-02-24 04:03:27,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [570296271] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:27,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:27,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:03:27,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028803841] [2022-02-24 04:03:27,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:27,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:03:27,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:27,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:03:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:03:27,206 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:27,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:27,314 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-02-24 04:03:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:03:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 04:03:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:27,315 INFO L225 Difference]: With dead ends: 21 [2022-02-24 04:03:27,315 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 04:03:27,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:03:27,321 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:27,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 04:03:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-24 04:03:27,327 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) [2022-02-24 04:03:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-02-24 04:03:27,328 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2022-02-24 04:03:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:27,328 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-02-24 04:03:27,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-02-24 04:03:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 04:03:27,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:27,329 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:27,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:03:27,330 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash -955485626, now seen corresponding path program 3 times [2022-02-24 04:03:27,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:27,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457517030] [2022-02-24 04:03:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:27,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:27,554 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:27,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:27,646 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:27,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457517030] [2022-02-24 04:03:27,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1457517030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:27,646 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:27,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:03:27,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997389406] [2022-02-24 04:03:27,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:27,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:03:27,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:03:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:03:27,648 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 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) [2022-02-24 04:03:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:27,766 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-02-24 04:03:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:03:27,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 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 [2022-02-24 04:03:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:27,767 INFO L225 Difference]: With dead ends: 22 [2022-02-24 04:03:27,768 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 04:03:27,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:03:27,769 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:27,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 04:03:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-24 04:03:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-02-24 04:03:27,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2022-02-24 04:03:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:27,774 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-02-24 04:03:27,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 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) [2022-02-24 04:03:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-02-24 04:03:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 04:03:27,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:27,775 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:27,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:03:27,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash 480105496, now seen corresponding path program 4 times [2022-02-24 04:03:27,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:27,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328933640] [2022-02-24 04:03:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:27,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:27,956 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:28,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:28,081 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:28,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328933640] [2022-02-24 04:03:28,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1328933640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:28,082 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:28,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:03:28,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220500081] [2022-02-24 04:03:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:28,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:03:28,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:03:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:03:28,085 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:28,194 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-02-24 04:03:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:03:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 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 16 [2022-02-24 04:03:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:28,196 INFO L225 Difference]: With dead ends: 23 [2022-02-24 04:03:28,196 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 04:03:28,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:03:28,197 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:28,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 04:03:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-24 04:03:28,204 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) [2022-02-24 04:03:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-02-24 04:03:28,209 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-02-24 04:03:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:28,210 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-02-24 04:03:28,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-02-24 04:03:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 04:03:28,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:28,212 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:28,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:03:28,212 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2033757318, now seen corresponding path program 5 times [2022-02-24 04:03:28,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:28,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76367771] [2022-02-24 04:03:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:28,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:28,376 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:28,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:28,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:28,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76367771] [2022-02-24 04:03:28,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [76367771] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:28,494 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:28,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:03:28,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224696308] [2022-02-24 04:03:28,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:28,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:03:28,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:03:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:03:28,495 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 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) [2022-02-24 04:03:28,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:28,625 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-02-24 04:03:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:03:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 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 [2022-02-24 04:03:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:28,627 INFO L225 Difference]: With dead ends: 24 [2022-02-24 04:03:28,627 INFO L226 Difference]: Without dead ends: 19 [2022-02-24 04:03:28,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:03:28,630 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:28,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:28,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-24 04:03:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-24 04:03:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-02-24 04:03:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-02-24 04:03:28,638 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-02-24 04:03:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:28,638 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-02-24 04:03:28,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 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) [2022-02-24 04:03:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-02-24 04:03:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 04:03:28,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:28,639 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:28,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:03:28,639 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:28,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:28,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1342643752, now seen corresponding path program 6 times [2022-02-24 04:03:28,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:28,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702127147] [2022-02-24 04:03:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:28,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:28,807 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:28,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:28,924 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:28,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702127147] [2022-02-24 04:03:28,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702127147] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:28,924 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:28,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:03:28,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336869541] [2022-02-24 04:03:28,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:28,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:03:28,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:28,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:03:28,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:03:28,926 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:29,058 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-02-24 04:03:29,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:03:29,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (3), 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 18 [2022-02-24 04:03:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:29,059 INFO L225 Difference]: With dead ends: 25 [2022-02-24 04:03:29,059 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 04:03:29,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:03:29,060 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:29,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 04:03:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 04:03:29,063 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) [2022-02-24 04:03:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-02-24 04:03:29,064 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2022-02-24 04:03:29,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:29,064 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-02-24 04:03:29,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:29,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-24 04:03:29,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 04:03:29,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:29,065 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:29,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 04:03:29,065 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1363105478, now seen corresponding path program 7 times [2022-02-24 04:03:29,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:29,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425391762] [2022-02-24 04:03:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:29,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:29,232 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:29,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:29,395 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:29,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425391762] [2022-02-24 04:03:29,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [425391762] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:29,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:29,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:03:29,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908121292] [2022-02-24 04:03:29,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:29,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:03:29,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:03:29,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:03:29,397 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 11 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) [2022-02-24 04:03:29,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:29,567 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-02-24 04:03:29,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:03:29,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 11 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 [2022-02-24 04:03:29,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:29,568 INFO L225 Difference]: With dead ends: 26 [2022-02-24 04:03:29,569 INFO L226 Difference]: Without dead ends: 21 [2022-02-24 04:03:29,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:03:29,570 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:29,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-24 04:03:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-02-24 04:03:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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) [2022-02-24 04:03:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-02-24 04:03:29,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2022-02-24 04:03:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:29,574 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-02-24 04:03:29,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 11 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) [2022-02-24 04:03:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-02-24 04:03:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 04:03:29,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:29,575 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:29,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 04:03:29,575 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -658014312, now seen corresponding path program 8 times [2022-02-24 04:03:29,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:29,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225629733] [2022-02-24 04:03:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:29,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:29,734 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:29,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:29,871 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:29,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225629733] [2022-02-24 04:03:29,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [225629733] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:29,871 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:29,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:03:29,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436426883] [2022-02-24 04:03:29,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:29,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:03:29,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:03:29,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:03:29,873 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:30,056 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-02-24 04:03:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:03:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 04:03:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:30,057 INFO L225 Difference]: With dead ends: 27 [2022-02-24 04:03:30,057 INFO L226 Difference]: Without dead ends: 22 [2022-02-24 04:03:30,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2022-02-24 04:03:30,058 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:30,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-24 04:03:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-02-24 04:03:30,061 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) [2022-02-24 04:03:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-02-24 04:03:30,061 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2022-02-24 04:03:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:30,062 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-02-24 04:03:30,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-02-24 04:03:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 04:03:30,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:30,062 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:30,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 04:03:30,063 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:30,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1111781638, now seen corresponding path program 9 times [2022-02-24 04:03:30,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:30,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570879359] [2022-02-24 04:03:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:30,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:30,182 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:30,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:30,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:30,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570879359] [2022-02-24 04:03:30,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [570879359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:30,371 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:30,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:03:30,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140743673] [2022-02-24 04:03:30,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:30,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:03:30,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:03:30,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:03:30,372 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 13 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) [2022-02-24 04:03:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:30,564 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-02-24 04:03:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:03:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 13 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 [2022-02-24 04:03:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:30,565 INFO L225 Difference]: With dead ends: 28 [2022-02-24 04:03:30,565 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 04:03:30,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2022-02-24 04:03:30,566 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:30,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 04:03:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-24 04:03:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-02-24 04:03:30,571 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2022-02-24 04:03:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:30,571 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-02-24 04:03:30,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 13 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) [2022-02-24 04:03:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-02-24 04:03:30,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 04:03:30,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:30,572 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:30,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 04:03:30,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:30,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:30,572 INFO L85 PathProgramCache]: Analyzing trace with hash 140881240, now seen corresponding path program 10 times [2022-02-24 04:03:30,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:30,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100916443] [2022-02-24 04:03:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:30,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:30,725 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:30,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:30,910 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:30,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100916443] [2022-02-24 04:03:30,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1100916443] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:30,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:30,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:03:30,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093439446] [2022-02-24 04:03:30,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:30,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:03:30,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:03:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:03:30,912 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 16 states, 16 states have (on average 1.125) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:31,140 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-02-24 04:03:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:03:31,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.125) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (3), 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 22 [2022-02-24 04:03:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:31,142 INFO L225 Difference]: With dead ends: 29 [2022-02-24 04:03:31,142 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 04:03:31,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2022-02-24 04:03:31,143 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:31,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 04:03:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-24 04:03:31,146 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) [2022-02-24 04:03:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-02-24 04:03:31,147 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2022-02-24 04:03:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:31,147 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-02-24 04:03:31,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.125) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-02-24 04:03:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 04:03:31,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:31,148 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:31,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 04:03:31,148 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:31,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:31,148 INFO L85 PathProgramCache]: Analyzing trace with hash 107739974, now seen corresponding path program 11 times [2022-02-24 04:03:31,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:31,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985671862] [2022-02-24 04:03:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:31,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:31,299 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:31,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:31,474 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:31,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985671862] [2022-02-24 04:03:31,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985671862] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:31,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:31,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 04:03:31,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520549893] [2022-02-24 04:03:31,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:31,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 04:03:31,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 04:03:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:03:31,476 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 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) [2022-02-24 04:03:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:31,696 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-02-24 04:03:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 04:03:31,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 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 [2022-02-24 04:03:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:31,697 INFO L225 Difference]: With dead ends: 30 [2022-02-24 04:03:31,697 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 04:03:31,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2022-02-24 04:03:31,698 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:31,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:31,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 04:03:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-24 04:03:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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) [2022-02-24 04:03:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-02-24 04:03:31,703 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2022-02-24 04:03:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:31,703 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-02-24 04:03:31,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 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) [2022-02-24 04:03:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-02-24 04:03:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 04:03:31,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:31,704 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:31,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 04:03:31,704 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash -919639272, now seen corresponding path program 12 times [2022-02-24 04:03:31,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:31,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096094849] [2022-02-24 04:03:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:31,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:31,844 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:32,062 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:32,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096094849] [2022-02-24 04:03:32,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1096094849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:32,062 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:32,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 04:03:32,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320952426] [2022-02-24 04:03:32,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:32,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 04:03:32,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 04:03:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:03:32,064 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:32,316 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-02-24 04:03:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:03:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (3), 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 24 [2022-02-24 04:03:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:32,317 INFO L225 Difference]: With dead ends: 31 [2022-02-24 04:03:32,317 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 04:03:32,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=739, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 04:03:32,318 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:32,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:32,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 04:03:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 04:03:32,321 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) [2022-02-24 04:03:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-02-24 04:03:32,322 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2022-02-24 04:03:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:32,322 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-02-24 04:03:32,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-02-24 04:03:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 04:03:32,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:32,323 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:32,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 04:03:32,323 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1591342470, now seen corresponding path program 13 times [2022-02-24 04:03:32,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:32,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947443038] [2022-02-24 04:03:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:32,469 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:32,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:32,692 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:32,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947443038] [2022-02-24 04:03:32,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [947443038] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:32,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:32,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 04:03:32,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196901301] [2022-02-24 04:03:32,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:32,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 04:03:32,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:32,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 04:03:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:03:32,694 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 17 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) [2022-02-24 04:03:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:32,963 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-02-24 04:03:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:03:32,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 17 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 [2022-02-24 04:03:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:32,964 INFO L225 Difference]: With dead ends: 32 [2022-02-24 04:03:32,964 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 04:03:32,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=829, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 04:03:32,965 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:32,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 04:03:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 04:03:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 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) [2022-02-24 04:03:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-02-24 04:03:32,969 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2022-02-24 04:03:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:32,969 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-02-24 04:03:32,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 17 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) [2022-02-24 04:03:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-02-24 04:03:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 04:03:32,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:32,970 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:32,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 04:03:32,970 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:32,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2122365144, now seen corresponding path program 14 times [2022-02-24 04:03:32,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:32,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018378461] [2022-02-24 04:03:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:32,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:33,060 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:33,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:33,284 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:33,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018378461] [2022-02-24 04:03:33,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2018378461] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:33,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:33,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:03:33,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099380538] [2022-02-24 04:03:33,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:33,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:03:33,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:33,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:03:33,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:03:33,286 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:33,577 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-02-24 04:03:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 04:03:33,577 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 04:03:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:33,578 INFO L225 Difference]: With dead ends: 33 [2022-02-24 04:03:33,578 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 04:03:33,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 04:03:33,579 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:33,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 04:03:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-24 04:03:33,583 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) [2022-02-24 04:03:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-02-24 04:03:33,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2022-02-24 04:03:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:33,583 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-02-24 04:03:33,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-02-24 04:03:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 04:03:33,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:33,584 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:33,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 04:03:33,584 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:33,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1404198854, now seen corresponding path program 15 times [2022-02-24 04:03:33,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:33,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284566430] [2022-02-24 04:03:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:33,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:33,737 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:33,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:33,965 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:33,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284566430] [2022-02-24 04:03:33,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284566430] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:33,965 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:33,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 04:03:33,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017934602] [2022-02-24 04:03:33,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:33,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 04:03:33,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:33,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 04:03:33,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:03:33,967 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 19 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) [2022-02-24 04:03:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:34,231 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-02-24 04:03:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 04:03:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 19 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 [2022-02-24 04:03:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:34,232 INFO L225 Difference]: With dead ends: 34 [2022-02-24 04:03:34,232 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 04:03:34,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=1024, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 04:03:34,233 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:34,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 04:03:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-24 04:03:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-02-24 04:03:34,238 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2022-02-24 04:03:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:34,238 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-02-24 04:03:34,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 19 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) [2022-02-24 04:03:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-02-24 04:03:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:03:34,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:34,239 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:34,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 04:03:34,239 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:34,240 INFO L85 PathProgramCache]: Analyzing trace with hash 615880344, now seen corresponding path program 16 times [2022-02-24 04:03:34,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:34,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841486717] [2022-02-24 04:03:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:34,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:34,370 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:34,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:34,641 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:34,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841486717] [2022-02-24 04:03:34,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1841486717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:34,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:34,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 04:03:34,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922311057] [2022-02-24 04:03:34,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:34,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 04:03:34,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 04:03:34,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:03:34,642 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:34,928 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-02-24 04:03:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 04:03:34,928 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (3), 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 28 [2022-02-24 04:03:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:34,929 INFO L225 Difference]: With dead ends: 35 [2022-02-24 04:03:34,929 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 04:03:34,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=511, Invalid=1129, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 04:03:34,930 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:34,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 04:03:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 04:03:34,933 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) [2022-02-24 04:03:34,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-02-24 04:03:34,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2022-02-24 04:03:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:34,934 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-02-24 04:03:34,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-02-24 04:03:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 04:03:34,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:34,934 INFO L514 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:34,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 04:03:34,935 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:34,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1947810310, now seen corresponding path program 17 times [2022-02-24 04:03:34,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:34,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816603960] [2022-02-24 04:03:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:35,095 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:35,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:35,375 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:35,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816603960] [2022-02-24 04:03:35,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [816603960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:35,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:35,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 04:03:35,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636278128] [2022-02-24 04:03:35,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:35,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 04:03:35,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 04:03:35,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:03:35,377 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 21 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) [2022-02-24 04:03:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:35,667 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-02-24 04:03:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 04:03:35,668 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 21 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 [2022-02-24 04:03:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:35,668 INFO L225 Difference]: With dead ends: 36 [2022-02-24 04:03:35,668 INFO L226 Difference]: Without dead ends: 31 [2022-02-24 04:03:35,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=567, Invalid=1239, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 04:03:35,669 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:35,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-24 04:03:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-24 04:03:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2022-02-24 04:03:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-02-24 04:03:35,673 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2022-02-24 04:03:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:35,673 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-02-24 04:03:35,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 21 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) [2022-02-24 04:03:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-02-24 04:03:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:03:35,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:35,674 INFO L514 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:35,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 04:03:35,674 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash 287966296, now seen corresponding path program 18 times [2022-02-24 04:03:35,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:35,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052945605] [2022-02-24 04:03:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:35,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:35,800 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:35,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:36,103 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:36,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052945605] [2022-02-24 04:03:36,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052945605] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:36,104 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:36,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 04:03:36,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022622146] [2022-02-24 04:03:36,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:36,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 04:03:36,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 04:03:36,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:03:36,105 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:36,440 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-02-24 04:03:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 04:03:36,440 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (3), 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 30 [2022-02-24 04:03:36,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:36,441 INFO L225 Difference]: With dead ends: 37 [2022-02-24 04:03:36,441 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 04:03:36,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=626, Invalid=1354, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 04:03:36,442 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:36,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 04:03:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-24 04:03:36,445 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) [2022-02-24 04:03:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-02-24 04:03:36,445 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2022-02-24 04:03:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:36,445 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-02-24 04:03:36,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-02-24 04:03:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:03:36,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:36,446 INFO L514 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:36,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 04:03:36,447 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash 372409414, now seen corresponding path program 19 times [2022-02-24 04:03:36,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:36,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129868574] [2022-02-24 04:03:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:36,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:36,576 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:36,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:36,917 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:36,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129868574] [2022-02-24 04:03:36,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [129868574] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:36,917 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:36,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 04:03:36,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577877696] [2022-02-24 04:03:36,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:36,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 04:03:36,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:36,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 04:03:36,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2022-02-24 04:03:36,918 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.08) internal successors, (27), 23 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) [2022-02-24 04:03:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:37,307 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-02-24 04:03:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 04:03:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.08) internal successors, (27), 23 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 [2022-02-24 04:03:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:37,308 INFO L225 Difference]: With dead ends: 38 [2022-02-24 04:03:37,308 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 04:03:37,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=688, Invalid=1474, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 04:03:37,310 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:37,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 04:03:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-24 04:03:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2022-02-24 04:03:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-02-24 04:03:37,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2022-02-24 04:03:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:37,314 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-02-24 04:03:37,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.08) internal successors, (27), 23 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) [2022-02-24 04:03:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-02-24 04:03:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 04:03:37,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:37,315 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:37,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 04:03:37,315 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:37,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:37,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1304821224, now seen corresponding path program 20 times [2022-02-24 04:03:37,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:37,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474163119] [2022-02-24 04:03:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:37,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:37,473 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:37,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:37,807 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:37,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474163119] [2022-02-24 04:03:37,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474163119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:37,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:37,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 04:03:37,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267967448] [2022-02-24 04:03:37,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:37,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 04:03:37,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 04:03:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2022-02-24 04:03:37,809 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:38,191 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-02-24 04:03:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 04:03:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 04:03:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:38,192 INFO L225 Difference]: With dead ends: 39 [2022-02-24 04:03:38,192 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 04:03:38,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=753, Invalid=1599, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 04:03:38,194 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:38,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 04:03:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-24 04:03:38,198 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) [2022-02-24 04:03:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-02-24 04:03:38,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2022-02-24 04:03:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:38,198 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-02-24 04:03:38,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-02-24 04:03:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:03:38,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:38,199 INFO L514 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:38,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 04:03:38,200 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:38,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1759363450, now seen corresponding path program 21 times [2022-02-24 04:03:38,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:38,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965573385] [2022-02-24 04:03:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:38,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:38,359 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:38,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:38,697 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:38,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965573385] [2022-02-24 04:03:38,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [965573385] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:38,698 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:38,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 04:03:38,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505730486] [2022-02-24 04:03:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:38,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 04:03:38,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 04:03:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2022-02-24 04:03:38,699 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 25 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) [2022-02-24 04:03:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:39,136 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-02-24 04:03:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 04:03:39,139 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 25 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 [2022-02-24 04:03:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:39,139 INFO L225 Difference]: With dead ends: 40 [2022-02-24 04:03:39,139 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 04:03:39,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=821, Invalid=1729, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 04:03:39,141 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:39,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:03:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 04:03:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-24 04:03:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-02-24 04:03:39,145 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2022-02-24 04:03:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:39,145 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-02-24 04:03:39,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 25 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) [2022-02-24 04:03:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-02-24 04:03:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:03:39,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:39,146 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:39,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 04:03:39,146 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1329696728, now seen corresponding path program 22 times [2022-02-24 04:03:39,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:39,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025677413] [2022-02-24 04:03:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:39,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:39,285 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:39,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:39,675 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:39,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025677413] [2022-02-24 04:03:39,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025677413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:39,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:39,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 04:03:39,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309610993] [2022-02-24 04:03:39,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:39,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 04:03:39,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 04:03:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-02-24 04:03:39,677 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:40,117 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-02-24 04:03:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 04:03:40,117 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (3), 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 34 [2022-02-24 04:03:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:40,118 INFO L225 Difference]: With dead ends: 41 [2022-02-24 04:03:40,118 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 04:03:40,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=892, Invalid=1864, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 04:03:40,119 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:40,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 04:03:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-24 04:03:40,123 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) [2022-02-24 04:03:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-02-24 04:03:40,123 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2022-02-24 04:03:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:40,124 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-02-24 04:03:40,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-02-24 04:03:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 04:03:40,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:40,124 INFO L514 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:40,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 04:03:40,125 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:40,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1693685562, now seen corresponding path program 23 times [2022-02-24 04:03:40,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:40,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488396830] [2022-02-24 04:03:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:40,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:40,264 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:40,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:40,654 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:40,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488396830] [2022-02-24 04:03:40,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [488396830] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:40,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:40,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 04:03:40,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505616512] [2022-02-24 04:03:40,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:40,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 04:03:40,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 04:03:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=504, Unknown=0, NotChecked=0, Total=812 [2022-02-24 04:03:40,655 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 27 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) [2022-02-24 04:03:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:41,111 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-02-24 04:03:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 04:03:41,112 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 27 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 [2022-02-24 04:03:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:41,112 INFO L225 Difference]: With dead ends: 42 [2022-02-24 04:03:41,112 INFO L226 Difference]: Without dead ends: 37 [2022-02-24 04:03:41,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=966, Invalid=2004, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 04:03:41,114 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:41,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:41,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-24 04:03:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-24 04:03:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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) [2022-02-24 04:03:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-02-24 04:03:41,117 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2022-02-24 04:03:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:41,118 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-02-24 04:03:41,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 27 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) [2022-02-24 04:03:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-02-24 04:03:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 04:03:41,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:41,118 INFO L514 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:41,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 04:03:41,119 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:41,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:41,119 INFO L85 PathProgramCache]: Analyzing trace with hash -929256040, now seen corresponding path program 24 times [2022-02-24 04:03:41,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:41,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410355787] [2022-02-24 04:03:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:41,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:41,248 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:41,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:41,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:41,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410355787] [2022-02-24 04:03:41,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [410355787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:41,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:41,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 04:03:41,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679231175] [2022-02-24 04:03:41,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:41,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 04:03:41,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 04:03:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=537, Unknown=0, NotChecked=0, Total=870 [2022-02-24 04:03:41,678 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 28 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:42,149 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-02-24 04:03:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 04:03:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 28 states have internal predecessors, (32), 2 states have call successors, (3), 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 36 [2022-02-24 04:03:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:42,150 INFO L225 Difference]: With dead ends: 43 [2022-02-24 04:03:42,150 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 04:03:42,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1043, Invalid=2149, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 04:03:42,151 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:42,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 04:03:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-24 04:03:42,155 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) [2022-02-24 04:03:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-02-24 04:03:42,155 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2022-02-24 04:03:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:42,155 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-02-24 04:03:42,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 28 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-02-24 04:03:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 04:03:42,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:42,156 INFO L514 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:42,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 04:03:42,156 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:42,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1293222662, now seen corresponding path program 25 times [2022-02-24 04:03:42,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:42,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630399651] [2022-02-24 04:03:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:42,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:42,248 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:42,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:42,687 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:42,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630399651] [2022-02-24 04:03:42,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [630399651] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:42,687 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:42,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 04:03:42,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353838143] [2022-02-24 04:03:42,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:42,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 04:03:42,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 04:03:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=571, Unknown=0, NotChecked=0, Total=930 [2022-02-24 04:03:42,688 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 31 states, 31 states have (on average 1.064516129032258) internal successors, (33), 29 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) [2022-02-24 04:03:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:43,167 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-02-24 04:03:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 04:03:43,167 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.064516129032258) internal successors, (33), 29 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 [2022-02-24 04:03:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:43,168 INFO L225 Difference]: With dead ends: 44 [2022-02-24 04:03:43,168 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 04:03:43,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1123, Invalid=2299, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 04:03:43,170 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:43,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 04:03:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-24 04:03:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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) [2022-02-24 04:03:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-02-24 04:03:43,174 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2022-02-24 04:03:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:43,174 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-02-24 04:03:43,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.064516129032258) internal successors, (33), 29 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) [2022-02-24 04:03:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-02-24 04:03:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 04:03:43,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:43,175 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:43,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 04:03:43,175 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:43,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1470585688, now seen corresponding path program 26 times [2022-02-24 04:03:43,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:43,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240059582] [2022-02-24 04:03:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:43,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:43,341 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:43,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:43,818 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:43,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240059582] [2022-02-24 04:03:43,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240059582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:43,818 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:43,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 04:03:43,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871601358] [2022-02-24 04:03:43,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:43,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 04:03:43,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 04:03:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=606, Unknown=0, NotChecked=0, Total=992 [2022-02-24 04:03:43,820 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 32 states, 32 states have (on average 1.0625) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:44,388 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-02-24 04:03:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 04:03:44,389 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.0625) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 04:03:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:44,389 INFO L225 Difference]: With dead ends: 45 [2022-02-24 04:03:44,389 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 04:03:44,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1206, Invalid=2454, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 04:03:44,391 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:44,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 04:03:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-24 04:03:44,394 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) [2022-02-24 04:03:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-02-24 04:03:44,395 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2022-02-24 04:03:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:44,395 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-02-24 04:03:44,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.0625) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-02-24 04:03:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 04:03:44,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:44,396 INFO L514 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:44,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 04:03:44,396 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1621095098, now seen corresponding path program 27 times [2022-02-24 04:03:44,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:44,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655757948] [2022-02-24 04:03:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:44,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:44,526 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:44,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:45,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:45,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655757948] [2022-02-24 04:03:45,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655757948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:45,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:45,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 04:03:45,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535980117] [2022-02-24 04:03:45,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:45,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 04:03:45,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 04:03:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=642, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 04:03:45,054 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 31 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) [2022-02-24 04:03:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:45,596 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-02-24 04:03:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 04:03:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 31 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 [2022-02-24 04:03:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:45,597 INFO L225 Difference]: With dead ends: 46 [2022-02-24 04:03:45,597 INFO L226 Difference]: Without dead ends: 41 [2022-02-24 04:03:45,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1292, Invalid=2614, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 04:03:45,599 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:45,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-24 04:03:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-24 04:03:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-02-24 04:03:45,609 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2022-02-24 04:03:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:45,609 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-02-24 04:03:45,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 31 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) [2022-02-24 04:03:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-02-24 04:03:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 04:03:45,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:45,610 INFO L514 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:45,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 04:03:45,610 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:45,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1321048344, now seen corresponding path program 28 times [2022-02-24 04:03:45,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:45,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795634381] [2022-02-24 04:03:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:45,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:45,734 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:45,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:46,214 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:46,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795634381] [2022-02-24 04:03:46,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [795634381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:46,228 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:46,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 04:03:46,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947790503] [2022-02-24 04:03:46,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:46,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 04:03:46,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 04:03:46,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=679, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 04:03:46,230 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 32 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:46,797 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-02-24 04:03:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 04:03:46,797 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 32 states have internal predecessors, (36), 2 states have call successors, (3), 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 40 [2022-02-24 04:03:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:46,798 INFO L225 Difference]: With dead ends: 47 [2022-02-24 04:03:46,798 INFO L226 Difference]: Without dead ends: 42 [2022-02-24 04:03:46,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1381, Invalid=2779, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 04:03:46,799 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:46,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:46,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-24 04:03:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-24 04:03:46,803 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) [2022-02-24 04:03:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-02-24 04:03:46,804 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2022-02-24 04:03:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:46,804 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-02-24 04:03:46,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 32 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-02-24 04:03:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 04:03:46,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:46,805 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:46,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 04:03:46,805 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:46,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1961785466, now seen corresponding path program 29 times [2022-02-24 04:03:46,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:46,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595963639] [2022-02-24 04:03:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:46,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:46,932 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:46,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:47,441 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:47,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595963639] [2022-02-24 04:03:47,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [595963639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:47,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:47,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 04:03:47,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201323973] [2022-02-24 04:03:47,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:47,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 04:03:47,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 04:03:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=717, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 04:03:47,442 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 33 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) [2022-02-24 04:03:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:48,075 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-02-24 04:03:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 04:03:48,075 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 33 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 [2022-02-24 04:03:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:48,076 INFO L225 Difference]: With dead ends: 48 [2022-02-24 04:03:48,076 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 04:03:48,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1473, Invalid=2949, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 04:03:48,077 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:48,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 04:03:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-24 04:03:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 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) [2022-02-24 04:03:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-02-24 04:03:48,082 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2022-02-24 04:03:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:48,082 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-02-24 04:03:48,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 33 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) [2022-02-24 04:03:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-02-24 04:03:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 04:03:48,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:48,083 INFO L514 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:48,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 04:03:48,083 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:48,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash -650418472, now seen corresponding path program 30 times [2022-02-24 04:03:48,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:48,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877820682] [2022-02-24 04:03:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:48,178 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:48,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:48,713 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:48,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877820682] [2022-02-24 04:03:48,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [877820682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:48,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:48,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 04:03:48,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335823386] [2022-02-24 04:03:48,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:48,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 04:03:48,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:48,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 04:03:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=756, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 04:03:48,715 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:49,360 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-02-24 04:03:49,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 04:03:49,360 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (3), 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 42 [2022-02-24 04:03:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:49,361 INFO L225 Difference]: With dead ends: 49 [2022-02-24 04:03:49,361 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 04:03:49,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1568, Invalid=3124, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 04:03:49,362 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:49,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:49,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 04:03:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-24 04:03:49,365 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) [2022-02-24 04:03:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-02-24 04:03:49,365 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2022-02-24 04:03:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:49,365 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-02-24 04:03:49,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-02-24 04:03:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 04:03:49,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:49,366 INFO L514 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:49,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 04:03:49,366 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:49,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:49,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1347252678, now seen corresponding path program 31 times [2022-02-24 04:03:49,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:49,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95149827] [2022-02-24 04:03:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:49,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:49,490 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:49,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:50,110 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:50,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95149827] [2022-02-24 04:03:50,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [95149827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:50,111 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:50,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 04:03:50,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478680210] [2022-02-24 04:03:50,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:50,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 04:03:50,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 04:03:50,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=796, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 04:03:50,112 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 37 states, 37 states have (on average 1.054054054054054) internal successors, (39), 35 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) [2022-02-24 04:03:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:50,773 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-02-24 04:03:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 04:03:50,774 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.054054054054054) internal successors, (39), 35 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 [2022-02-24 04:03:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:50,774 INFO L225 Difference]: With dead ends: 50 [2022-02-24 04:03:50,774 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 04:03:50,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1666, Invalid=3304, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 04:03:50,776 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:50,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 04:03:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-24 04:03:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 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) [2022-02-24 04:03:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-02-24 04:03:50,779 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2022-02-24 04:03:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:50,779 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-02-24 04:03:50,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.054054054054054) internal successors, (39), 35 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) [2022-02-24 04:03:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-02-24 04:03:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 04:03:50,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:50,780 INFO L514 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:50,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 04:03:50,780 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:50,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1149451112, now seen corresponding path program 32 times [2022-02-24 04:03:50,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:50,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182445033] [2022-02-24 04:03:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:50,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:50,906 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:50,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:51,562 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:51,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182445033] [2022-02-24 04:03:51,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [182445033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:51,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:51,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 04:03:51,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360969577] [2022-02-24 04:03:51,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:51,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 04:03:51,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 04:03:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=837, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 04:03:51,567 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 38 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 36 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:52,226 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-02-24 04:03:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 04:03:52,227 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 36 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 04:03:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:52,227 INFO L225 Difference]: With dead ends: 51 [2022-02-24 04:03:52,227 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 04:03:52,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1767, Invalid=3489, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 04:03:52,228 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:52,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 04:03:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-24 04:03:52,231 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) [2022-02-24 04:03:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-02-24 04:03:52,232 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2022-02-24 04:03:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:52,232 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-02-24 04:03:52,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 36 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-02-24 04:03:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 04:03:52,232 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:52,233 INFO L514 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:52,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 04:03:52,233 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:52,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1237857274, now seen corresponding path program 33 times [2022-02-24 04:03:52,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:52,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013398597] [2022-02-24 04:03:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:52,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:52,356 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:52,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:52,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:52,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013398597] [2022-02-24 04:03:52,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013398597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:52,947 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:52,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 04:03:52,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703522804] [2022-02-24 04:03:52,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:52,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 04:03:52,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 04:03:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=879, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 04:03:52,948 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 39 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 37 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) [2022-02-24 04:03:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:53,641 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-02-24 04:03:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 04:03:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 37 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 [2022-02-24 04:03:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:53,642 INFO L225 Difference]: With dead ends: 52 [2022-02-24 04:03:53,642 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 04:03:53,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1871, Invalid=3679, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 04:03:53,643 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:53,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 04:03:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-24 04:03:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-02-24 04:03:53,645 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2022-02-24 04:03:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:53,646 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-02-24 04:03:53,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 37 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) [2022-02-24 04:03:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-02-24 04:03:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 04:03:53,646 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:53,646 INFO L514 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:53,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 04:03:53,646 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:53,646 INFO L85 PathProgramCache]: Analyzing trace with hash 316519000, now seen corresponding path program 34 times [2022-02-24 04:03:53,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:53,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933459018] [2022-02-24 04:03:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:53,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:53,770 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:53,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:54,496 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:54,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933459018] [2022-02-24 04:03:54,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1933459018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:54,496 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:54,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 04:03:54,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519083754] [2022-02-24 04:03:54,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:54,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 04:03:54,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:54,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 04:03:54,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=922, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 04:03:54,498 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 40 states, 40 states have (on average 1.05) internal successors, (42), 38 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:55,258 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-02-24 04:03:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 04:03:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.05) internal successors, (42), 38 states have internal predecessors, (42), 2 states have call successors, (3), 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 46 [2022-02-24 04:03:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:55,259 INFO L225 Difference]: With dead ends: 53 [2022-02-24 04:03:55,259 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 04:03:55,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1978, Invalid=3874, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 04:03:55,260 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:55,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 04:03:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-24 04:03:55,262 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) [2022-02-24 04:03:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-02-24 04:03:55,263 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2022-02-24 04:03:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:55,263 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-02-24 04:03:55,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.05) internal successors, (42), 38 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-02-24 04:03:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 04:03:55,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:55,263 INFO L514 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:55,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 04:03:55,264 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1257543238, now seen corresponding path program 35 times [2022-02-24 04:03:55,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:55,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138459976] [2022-02-24 04:03:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:55,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:55,356 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:55,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:56,039 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:56,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138459976] [2022-02-24 04:03:56,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138459976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:56,040 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:56,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 04:03:56,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321903355] [2022-02-24 04:03:56,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:56,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 04:03:56,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 04:03:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=966, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 04:03:56,041 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 41 states, 41 states have (on average 1.048780487804878) internal successors, (43), 39 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) [2022-02-24 04:03:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:56,809 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-02-24 04:03:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 04:03:56,809 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.048780487804878) internal successors, (43), 39 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 [2022-02-24 04:03:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:56,810 INFO L225 Difference]: With dead ends: 54 [2022-02-24 04:03:56,810 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 04:03:56,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2088, Invalid=4074, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 04:03:56,811 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:56,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 04:03:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-24 04:03:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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) [2022-02-24 04:03:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-02-24 04:03:56,815 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2022-02-24 04:03:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:56,815 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-02-24 04:03:56,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.048780487804878) internal successors, (43), 39 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) [2022-02-24 04:03:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-02-24 04:03:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 04:03:56,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:56,815 INFO L514 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:56,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 04:03:56,815 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash 364523544, now seen corresponding path program 36 times [2022-02-24 04:03:56,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:56,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043354170] [2022-02-24 04:03:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:56,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:56,903 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:56,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:57,657 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:57,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043354170] [2022-02-24 04:03:57,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043354170] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:57,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:57,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 04:03:57,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113638832] [2022-02-24 04:03:57,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:57,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 04:03:57,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:57,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 04:03:57,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1011, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 04:03:57,659 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 42 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 40 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:58,530 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-02-24 04:03:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 04:03:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 40 states have internal predecessors, (44), 2 states have call successors, (3), 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 48 [2022-02-24 04:03:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:58,531 INFO L225 Difference]: With dead ends: 55 [2022-02-24 04:03:58,531 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 04:03:58,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2201, Invalid=4279, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 04:03:58,533 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:58,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:03:58,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 04:03:58,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-24 04:03:58,536 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) [2022-02-24 04:03:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-02-24 04:03:58,536 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2022-02-24 04:03:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:58,537 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-02-24 04:03:58,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 40 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-02-24 04:03:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 04:03:58,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:58,537 INFO L514 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:58,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 04:03:58,537 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1549283194, now seen corresponding path program 37 times [2022-02-24 04:03:58,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:58,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593774972] [2022-02-24 04:03:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:58,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:58,681 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:58,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:59,385 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:59,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593774972] [2022-02-24 04:03:59,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [593774972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:59,385 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:59,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 04:03:59,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241107624] [2022-02-24 04:03:59,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:59,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 04:03:59,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 04:03:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=1057, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 04:03:59,386 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 43 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 41 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) [2022-02-24 04:04:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:00,244 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-02-24 04:04:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 04:04:00,244 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 41 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 [2022-02-24 04:04:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:00,244 INFO L225 Difference]: With dead ends: 56 [2022-02-24 04:04:00,244 INFO L226 Difference]: Without dead ends: 51 [2022-02-24 04:04:00,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2317, Invalid=4489, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 04:04:00,246 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:00,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-24 04:04:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-24 04:04:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 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) [2022-02-24 04:04:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-02-24 04:04:00,249 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2022-02-24 04:04:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:00,249 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-02-24 04:04:00,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 41 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) [2022-02-24 04:04:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-02-24 04:04:00,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 04:04:00,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:00,250 INFO L514 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:00,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 04:04:00,250 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:00,250 INFO L85 PathProgramCache]: Analyzing trace with hash -747749928, now seen corresponding path program 38 times [2022-02-24 04:04:00,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:00,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601583883] [2022-02-24 04:04:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:00,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:00,369 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:00,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:01,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:01,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601583883] [2022-02-24 04:04:01,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601583883] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:01,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:01,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-24 04:04:01,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137540629] [2022-02-24 04:04:01,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:01,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-24 04:04:01,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-24 04:04:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1104, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 04:04:01,141 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:01,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:01,992 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-02-24 04:04:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 04:04:01,992 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 04:04:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:01,993 INFO L225 Difference]: With dead ends: 57 [2022-02-24 04:04:01,993 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 04:04:01,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2436, Invalid=4704, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 04:04:01,994 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:01,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 04:04:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-02-24 04:04:01,997 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) [2022-02-24 04:04:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-02-24 04:04:01,998 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2022-02-24 04:04:01,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:01,998 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-02-24 04:04:01,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:01,998 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-02-24 04:04:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 04:04:01,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:01,999 INFO L514 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:01,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 04:04:01,999 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:01,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1670022458, now seen corresponding path program 39 times [2022-02-24 04:04:01,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:02,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534980597] [2022-02-24 04:04:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:02,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:02,145 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:02,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:02,936 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:02,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534980597] [2022-02-24 04:04:02,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [534980597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:02,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:02,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 04:04:02,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809442073] [2022-02-24 04:04:02,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:02,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 04:04:02,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:02,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 04:04:02,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1152, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 04:04:02,938 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 45 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 43 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) [2022-02-24 04:04:03,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:03,837 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-02-24 04:04:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 04:04:03,837 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 43 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 [2022-02-24 04:04:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:03,838 INFO L225 Difference]: With dead ends: 58 [2022-02-24 04:04:03,838 INFO L226 Difference]: Without dead ends: 53 [2022-02-24 04:04:03,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2558, Invalid=4924, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 04:04:03,839 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:03,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-24 04:04:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-24 04:04:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-02-24 04:04:03,843 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2022-02-24 04:04:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:03,843 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-02-24 04:04:03,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 43 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) [2022-02-24 04:04:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-02-24 04:04:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:04:03,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:03,843 INFO L514 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:03,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 04:04:03,844 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash -195699816, now seen corresponding path program 40 times [2022-02-24 04:04:03,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:03,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526570901] [2022-02-24 04:04:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:03,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:03,943 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:03,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:04,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:04,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526570901] [2022-02-24 04:04:04,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526570901] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:04,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:04,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-24 04:04:04,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657627912] [2022-02-24 04:04:04,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:04,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-24 04:04:04,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-24 04:04:04,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1201, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 04:04:04,784 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 46 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 44 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:05,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:05,712 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-02-24 04:04:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 04:04:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 44 states have internal predecessors, (48), 2 states have call successors, (3), 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 52 [2022-02-24 04:04:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:05,713 INFO L225 Difference]: With dead ends: 59 [2022-02-24 04:04:05,713 INFO L226 Difference]: Without dead ends: 54 [2022-02-24 04:04:05,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2683, Invalid=5149, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 04:04:05,714 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:05,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-24 04:04:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-24 04:04:05,716 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) [2022-02-24 04:04:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-02-24 04:04:05,717 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2022-02-24 04:04:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:05,717 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-02-24 04:04:05,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 44 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-02-24 04:04:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 04:04:05,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:05,717 INFO L514 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:05,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 04:04:05,717 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1736338170, now seen corresponding path program 41 times [2022-02-24 04:04:05,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:05,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882658879] [2022-02-24 04:04:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:05,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:05,813 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:05,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:06,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:06,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882658879] [2022-02-24 04:04:06,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1882658879] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:06,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:06,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 04:04:06,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587582456] [2022-02-24 04:04:06,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:06,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 04:04:06,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:06,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 04:04:06,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1251, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 04:04:06,665 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 47 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 45 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) [2022-02-24 04:04:07,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:07,688 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-02-24 04:04:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 04:04:07,689 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 45 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 [2022-02-24 04:04:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:07,689 INFO L225 Difference]: With dead ends: 60 [2022-02-24 04:04:07,689 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 04:04:07,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2811, Invalid=5379, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 04:04:07,690 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:07,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 04:04:07,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-24 04:04:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2022-02-24 04:04:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-02-24 04:04:07,694 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2022-02-24 04:04:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:07,694 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-02-24 04:04:07,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 45 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) [2022-02-24 04:04:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-02-24 04:04:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:04:07,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:07,695 INFO L514 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:07,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 04:04:07,695 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:07,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2043480408, now seen corresponding path program 42 times [2022-02-24 04:04:07,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:07,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693447491] [2022-02-24 04:04:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:07,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:07,817 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:07,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:08,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:08,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693447491] [2022-02-24 04:04:08,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [693447491] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:08,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:08,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 04:04:08,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262470171] [2022-02-24 04:04:08,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:08,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 04:04:08,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:08,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 04:04:08,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1302, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 04:04:08,735 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 46 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:09,767 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-02-24 04:04:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 04:04:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 46 states have internal predecessors, (50), 2 states have call successors, (3), 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 54 [2022-02-24 04:04:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:09,768 INFO L225 Difference]: With dead ends: 61 [2022-02-24 04:04:09,768 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 04:04:09,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2942, Invalid=5614, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 04:04:09,770 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:09,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 04:04:09,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-24 04:04:09,773 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) [2022-02-24 04:04:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-02-24 04:04:09,774 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2022-02-24 04:04:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:09,774 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-02-24 04:04:09,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 46 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-02-24 04:04:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:04:09,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:09,775 INFO L514 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:09,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 04:04:09,775 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:09,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1041227962, now seen corresponding path program 43 times [2022-02-24 04:04:09,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:09,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404656603] [2022-02-24 04:04:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:09,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:09,911 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:09,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:10,890 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:10,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404656603] [2022-02-24 04:04:10,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1404656603] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:10,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:10,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 04:04:10,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964106449] [2022-02-24 04:04:10,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:10,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 04:04:10,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 04:04:10,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1354, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 04:04:10,892 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 49 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 47 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) [2022-02-24 04:04:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:11,925 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-02-24 04:04:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 04:04:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 47 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 [2022-02-24 04:04:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:11,925 INFO L225 Difference]: With dead ends: 62 [2022-02-24 04:04:11,926 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 04:04:11,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3076, Invalid=5854, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 04:04:11,926 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:11,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 04:04:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-24 04:04:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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) [2022-02-24 04:04:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-02-24 04:04:11,930 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2022-02-24 04:04:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:11,931 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-02-24 04:04:11,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 47 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) [2022-02-24 04:04:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-02-24 04:04:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 04:04:11,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:11,931 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:11,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 04:04:11,931 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2117060376, now seen corresponding path program 44 times [2022-02-24 04:04:11,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:11,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347551888] [2022-02-24 04:04:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:11,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:12,058 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:12,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:12,983 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:12,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347551888] [2022-02-24 04:04:12,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [347551888] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:12,984 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:12,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 04:04:12,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053813919] [2022-02-24 04:04:12,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:12,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 04:04:12,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:12,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 04:04:12,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1407, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 04:04:12,985 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 50 states, 50 states have (on average 1.04) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:14,119 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-02-24 04:04:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 04:04:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.04) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 04:04:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:14,120 INFO L225 Difference]: With dead ends: 63 [2022-02-24 04:04:14,120 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 04:04:14,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3213, Invalid=6099, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 04:04:14,121 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:14,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 04:04:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-02-24 04:04:14,125 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) [2022-02-24 04:04:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-02-24 04:04:14,125 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2022-02-24 04:04:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:14,126 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-02-24 04:04:14,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.04) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:14,126 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-02-24 04:04:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 04:04:14,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:14,126 INFO L514 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:14,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 04:04:14,127 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:14,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1239751046, now seen corresponding path program 45 times [2022-02-24 04:04:14,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:14,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60914379] [2022-02-24 04:04:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:14,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:14,216 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:14,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:15,296 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:15,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60914379] [2022-02-24 04:04:15,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [60914379] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:15,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:15,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 04:04:15,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360561114] [2022-02-24 04:04:15,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:15,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 04:04:15,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 04:04:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1461, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 04:04:15,299 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 51 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 49 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) [2022-02-24 04:04:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:16,510 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-02-24 04:04:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 04:04:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 49 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 [2022-02-24 04:04:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:16,511 INFO L225 Difference]: With dead ends: 64 [2022-02-24 04:04:16,511 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 04:04:16,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3353, Invalid=6349, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 04:04:16,512 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:16,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 04:04:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-24 04:04:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-02-24 04:04:16,516 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2022-02-24 04:04:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:16,517 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-02-24 04:04:16,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 49 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) [2022-02-24 04:04:16,517 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-02-24 04:04:16,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 04:04:16,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:16,517 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:16,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 04:04:16,517 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:16,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:16,518 INFO L85 PathProgramCache]: Analyzing trace with hash -187034408, now seen corresponding path program 46 times [2022-02-24 04:04:16,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:16,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128093506] [2022-02-24 04:04:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:16,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:16,615 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:16,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:17,623 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:17,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128093506] [2022-02-24 04:04:17,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [128093506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:17,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:17,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-24 04:04:17,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189892837] [2022-02-24 04:04:17,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:17,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-24 04:04:17,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-24 04:04:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1516, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 04:04:17,624 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 52 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 50 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:18,781 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-02-24 04:04:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 04:04:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 50 states have internal predecessors, (54), 2 states have call successors, (3), 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 58 [2022-02-24 04:04:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:18,782 INFO L225 Difference]: With dead ends: 65 [2022-02-24 04:04:18,782 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 04:04:18,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3496, Invalid=6604, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 04:04:18,783 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:18,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 04:04:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-24 04:04:18,787 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) [2022-02-24 04:04:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-02-24 04:04:18,787 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2022-02-24 04:04:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:18,787 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-02-24 04:04:18,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 50 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-02-24 04:04:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 04:04:18,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:18,788 INFO L514 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:18,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 04:04:18,788 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1467710522, now seen corresponding path program 47 times [2022-02-24 04:04:18,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:18,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99317573] [2022-02-24 04:04:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:18,876 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:18,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:19,905 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:19,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99317573] [2022-02-24 04:04:19,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [99317573] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:19,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:19,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 04:04:19,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158684910] [2022-02-24 04:04:19,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:19,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 04:04:19,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 04:04:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=1572, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 04:04:19,907 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 53 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 51 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) [2022-02-24 04:04:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:21,106 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-02-24 04:04:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 04:04:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 51 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 [2022-02-24 04:04:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:21,107 INFO L225 Difference]: With dead ends: 66 [2022-02-24 04:04:21,107 INFO L226 Difference]: Without dead ends: 61 [2022-02-24 04:04:21,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3642, Invalid=6864, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 04:04:21,108 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:21,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-24 04:04:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-24 04:04:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 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) [2022-02-24 04:04:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-02-24 04:04:21,113 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2022-02-24 04:04:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:21,113 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-02-24 04:04:21,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 51 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) [2022-02-24 04:04:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-02-24 04:04:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 04:04:21,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:21,114 INFO L514 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:21,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 04:04:21,114 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1781002904, now seen corresponding path program 48 times [2022-02-24 04:04:21,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:21,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696489757] [2022-02-24 04:04:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:21,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:21,238 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:21,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:22,388 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:22,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696489757] [2022-02-24 04:04:22,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1696489757] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:22,388 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:22,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 04:04:22,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755564235] [2022-02-24 04:04:22,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:22,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 04:04:22,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:22,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 04:04:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1629, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 04:04:22,390 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 54 states, 54 states have (on average 1.037037037037037) internal successors, (56), 52 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:23,700 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-02-24 04:04:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 04:04:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.037037037037037) internal successors, (56), 52 states have internal predecessors, (56), 2 states have call successors, (3), 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 60 [2022-02-24 04:04:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:23,701 INFO L225 Difference]: With dead ends: 67 [2022-02-24 04:04:23,701 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 04:04:23,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3791, Invalid=7129, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 04:04:23,702 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:23,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 04:04:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-24 04:04:23,706 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) [2022-02-24 04:04:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-02-24 04:04:23,706 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2022-02-24 04:04:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-02-24 04:04:23,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.037037037037037) internal successors, (56), 52 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-02-24 04:04:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:04:23,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:23,707 INFO L514 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:23,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 04:04:23,707 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash -588095994, now seen corresponding path program 49 times [2022-02-24 04:04:23,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:23,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577317067] [2022-02-24 04:04:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:23,833 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:23,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:24,959 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:24,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577317067] [2022-02-24 04:04:24,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [577317067] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:24,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:24,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-24 04:04:24,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044436369] [2022-02-24 04:04:24,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:24,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-24 04:04:24,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:24,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-24 04:04:24,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1687, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 04:04:24,961 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 55 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 53 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) [2022-02-24 04:04:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:26,262 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-02-24 04:04:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 04:04:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 53 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 [2022-02-24 04:04:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:26,263 INFO L225 Difference]: With dead ends: 68 [2022-02-24 04:04:26,263 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 04:04:26,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3943, Invalid=7399, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 04:04:26,265 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:26,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:26,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 04:04:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-24 04:04:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 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) [2022-02-24 04:04:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-02-24 04:04:26,269 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2022-02-24 04:04:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:26,269 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-02-24 04:04:26,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 53 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) [2022-02-24 04:04:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-02-24 04:04:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 04:04:26,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:26,270 INFO L514 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:26,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 04:04:26,270 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:26,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1015717800, now seen corresponding path program 50 times [2022-02-24 04:04:26,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:26,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032164094] [2022-02-24 04:04:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:26,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:26,413 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:26,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:27,578 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:27,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032164094] [2022-02-24 04:04:27,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1032164094] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:27,578 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:27,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 04:04:27,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201408257] [2022-02-24 04:04:27,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:27,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 04:04:27,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 04:04:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=1746, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 04:04:27,580 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 56 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 54 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:28,923 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-02-24 04:04:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 04:04:28,924 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 54 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 04:04:28,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:28,924 INFO L225 Difference]: With dead ends: 69 [2022-02-24 04:04:28,924 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 04:04:28,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4098, Invalid=7674, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 04:04:28,926 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:28,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 04:04:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-24 04:04:28,929 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) [2022-02-24 04:04:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-02-24 04:04:28,930 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2022-02-24 04:04:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:28,930 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-02-24 04:04:28,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 54 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-02-24 04:04:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 04:04:28,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:28,931 INFO L514 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:28,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 04:04:28,931 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:28,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1387091898, now seen corresponding path program 51 times [2022-02-24 04:04:28,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:28,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620443615] [2022-02-24 04:04:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:28,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:29,054 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:29,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:30,244 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:30,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620443615] [2022-02-24 04:04:30,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [620443615] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:30,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:30,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 04:04:30,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922403780] [2022-02-24 04:04:30,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:30,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 04:04:30,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:30,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 04:04:30,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=1806, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 04:04:30,246 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 57 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 55 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) [2022-02-24 04:04:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:31,631 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-02-24 04:04:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 04:04:31,632 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 55 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 [2022-02-24 04:04:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:31,632 INFO L225 Difference]: With dead ends: 70 [2022-02-24 04:04:31,632 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 04:04:31,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4256, Invalid=7954, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 04:04:31,634 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:31,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:31,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 04:04:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-02-24 04:04:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-02-24 04:04:31,639 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2022-02-24 04:04:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:31,639 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-02-24 04:04:31,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 55 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) [2022-02-24 04:04:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-02-24 04:04:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 04:04:31,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:31,640 INFO L514 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:31,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 04:04:31,640 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash -14787048, now seen corresponding path program 52 times [2022-02-24 04:04:31,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:31,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197037452] [2022-02-24 04:04:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:31,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:31,772 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:33,017 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:33,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197037452] [2022-02-24 04:04:33,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197037452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:33,018 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:33,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-24 04:04:33,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842304233] [2022-02-24 04:04:33,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:33,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-24 04:04:33,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-24 04:04:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1867, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 04:04:33,019 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 58 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:34,429 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-02-24 04:04:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 04:04:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (3), 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 64 [2022-02-24 04:04:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:34,430 INFO L225 Difference]: With dead ends: 71 [2022-02-24 04:04:34,430 INFO L226 Difference]: Without dead ends: 66 [2022-02-24 04:04:34,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4417, Invalid=8239, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 04:04:34,431 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:34,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-24 04:04:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-02-24 04:04:34,435 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) [2022-02-24 04:04:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-02-24 04:04:34,436 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2022-02-24 04:04:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:34,436 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-02-24 04:04:34,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-02-24 04:04:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 04:04:34,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:34,437 INFO L514 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:34,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 04:04:34,437 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash -423009658, now seen corresponding path program 53 times [2022-02-24 04:04:34,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:34,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639702030] [2022-02-24 04:04:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:34,562 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:34,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:35,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:35,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639702030] [2022-02-24 04:04:35,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639702030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:35,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:35,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 04:04:35,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935621956] [2022-02-24 04:04:35,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:35,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 04:04:35,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 04:04:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=1929, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 04:04:35,832 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 59 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 57 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) [2022-02-24 04:04:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:37,454 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-02-24 04:04:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 04:04:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 57 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 [2022-02-24 04:04:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:37,455 INFO L225 Difference]: With dead ends: 72 [2022-02-24 04:04:37,455 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 04:04:37,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4581, Invalid=8529, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 04:04:37,456 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:37,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 04:04:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-24 04:04:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 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) [2022-02-24 04:04:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-02-24 04:04:37,461 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2022-02-24 04:04:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:37,461 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-02-24 04:04:37,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 57 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) [2022-02-24 04:04:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-02-24 04:04:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 04:04:37,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:37,462 INFO L514 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:37,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 04:04:37,462 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:37,462 INFO L85 PathProgramCache]: Analyzing trace with hash -193008680, now seen corresponding path program 54 times [2022-02-24 04:04:37,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:37,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546966390] [2022-02-24 04:04:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:37,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:37,552 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:37,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:38,883 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:38,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546966390] [2022-02-24 04:04:38,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [546966390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:38,883 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:38,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 04:04:38,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974043166] [2022-02-24 04:04:38,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:38,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 04:04:38,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 04:04:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=1992, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 04:04:38,885 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 60 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 58 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:40,416 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-02-24 04:04:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 04:04:40,416 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 58 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-02-24 04:04:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:40,417 INFO L225 Difference]: With dead ends: 73 [2022-02-24 04:04:40,417 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 04:04:40,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4748, Invalid=8824, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 04:04:40,418 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:40,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 04:04:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-02-24 04:04:40,423 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) [2022-02-24 04:04:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-02-24 04:04:40,423 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2022-02-24 04:04:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:40,423 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-02-24 04:04:40,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 58 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-02-24 04:04:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 04:04:40,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:40,424 INFO L514 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:40,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 04:04:40,424 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:40,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1652912954, now seen corresponding path program 55 times [2022-02-24 04:04:40,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:40,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917618953] [2022-02-24 04:04:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:40,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:40,557 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:40,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:41,919 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:41,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917618953] [2022-02-24 04:04:41,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [917618953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:41,920 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:41,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 04:04:41,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481830952] [2022-02-24 04:04:41,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:41,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 04:04:41,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 04:04:41,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=2056, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 04:04:41,922 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 61 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 59 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) [2022-02-24 04:04:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:43,485 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-02-24 04:04:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 04:04:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 59 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 [2022-02-24 04:04:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:43,486 INFO L225 Difference]: With dead ends: 74 [2022-02-24 04:04:43,486 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 04:04:43,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4918, Invalid=9124, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 04:04:43,487 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:43,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 04:04:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-02-24 04:04:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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) [2022-02-24 04:04:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-02-24 04:04:43,491 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2022-02-24 04:04:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:43,491 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-02-24 04:04:43,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 59 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) [2022-02-24 04:04:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-02-24 04:04:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 04:04:43,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:43,491 INFO L514 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:43,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 04:04:43,492 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:43,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash 334694808, now seen corresponding path program 56 times [2022-02-24 04:04:43,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:43,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117824481] [2022-02-24 04:04:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:43,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:43,624 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:43,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:45,099 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:45,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117824481] [2022-02-24 04:04:45,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [117824481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:45,099 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:45,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-24 04:04:45,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098836551] [2022-02-24 04:04:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:45,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-24 04:04:45,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-24 04:04:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1661, Invalid=2121, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 04:04:45,101 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 62 states, 62 states have (on average 1.032258064516129) internal successors, (64), 60 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:46,724 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-02-24 04:04:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 04:04:46,724 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.032258064516129) internal successors, (64), 60 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 04:04:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:46,725 INFO L225 Difference]: With dead ends: 75 [2022-02-24 04:04:46,725 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 04:04:46,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5091, Invalid=9429, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 04:04:46,726 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:46,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 04:04:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-24 04:04:46,729 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) [2022-02-24 04:04:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-02-24 04:04:46,729 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2022-02-24 04:04:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:46,729 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-02-24 04:04:46,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.032258064516129) internal successors, (64), 60 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-02-24 04:04:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 04:04:46,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:46,730 INFO L514 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:46,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 04:04:46,730 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:46,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1820993286, now seen corresponding path program 57 times [2022-02-24 04:04:46,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:46,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971140451] [2022-02-24 04:04:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:46,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:46,873 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:46,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:48,365 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:48,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971140451] [2022-02-24 04:04:48,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971140451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:48,366 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:48,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 04:04:48,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90525344] [2022-02-24 04:04:48,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:48,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 04:04:48,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 04:04:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=2187, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 04:04:48,367 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 63 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 61 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) [2022-02-24 04:04:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:50,044 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-02-24 04:04:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 04:04:50,045 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 61 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 [2022-02-24 04:04:50,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:50,045 INFO L225 Difference]: With dead ends: 76 [2022-02-24 04:04:50,045 INFO L226 Difference]: Without dead ends: 71 [2022-02-24 04:04:50,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5267, Invalid=9739, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 04:04:50,047 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:50,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-24 04:04:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-02-24 04:04:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-02-24 04:04:50,052 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2022-02-24 04:04:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:50,052 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-02-24 04:04:50,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 61 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) [2022-02-24 04:04:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-02-24 04:04:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 04:04:50,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:50,053 INFO L514 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:50,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 04:04:50,054 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash 651605848, now seen corresponding path program 58 times [2022-02-24 04:04:50,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:50,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317116936] [2022-02-24 04:04:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:50,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:50,188 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:50,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:51,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:51,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317116936] [2022-02-24 04:04:51,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317116936] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:51,699 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:51,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-24 04:04:51,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148523301] [2022-02-24 04:04:51,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:51,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-24 04:04:51,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-24 04:04:51,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=2254, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 04:04:51,701 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 64 states, 64 states have (on average 1.03125) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:53,419 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2022-02-24 04:04:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-24 04:04:53,419 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.03125) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (3), 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 70 [2022-02-24 04:04:53,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:53,419 INFO L225 Difference]: With dead ends: 77 [2022-02-24 04:04:53,419 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 04:04:53,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5446, Invalid=10054, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 04:04:53,420 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:53,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 04:04:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-24 04:04:53,423 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) [2022-02-24 04:04:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-02-24 04:04:53,424 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2022-02-24 04:04:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:53,424 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-02-24 04:04:53,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.03125) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-02-24 04:04:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 04:04:53,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:53,425 INFO L514 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:53,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 04:04:53,425 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1239666362, now seen corresponding path program 59 times [2022-02-24 04:04:53,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:53,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281802016] [2022-02-24 04:04:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:53,518 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:53,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:55,058 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:55,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281802016] [2022-02-24 04:04:55,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [281802016] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:55,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:55,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 04:04:55,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619982741] [2022-02-24 04:04:55,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:55,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 04:04:55,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:55,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 04:04:55,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1838, Invalid=2322, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 04:04:55,059 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 65 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 63 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) [2022-02-24 04:04:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:56,858 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-02-24 04:04:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 04:04:56,859 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 63 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 [2022-02-24 04:04:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:56,859 INFO L225 Difference]: With dead ends: 78 [2022-02-24 04:04:56,859 INFO L226 Difference]: Without dead ends: 73 [2022-02-24 04:04:56,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5628, Invalid=10374, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 04:04:56,861 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:56,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:04:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-24 04:04:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-02-24 04:04:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 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) [2022-02-24 04:04:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-02-24 04:04:56,866 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2022-02-24 04:04:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:56,866 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-02-24 04:04:56,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 63 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) [2022-02-24 04:04:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-02-24 04:04:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 04:04:56,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:56,867 INFO L514 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:56,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 04:04:56,867 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash 260437272, now seen corresponding path program 60 times [2022-02-24 04:04:56,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:56,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058133711] [2022-02-24 04:04:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:56,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:57,016 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:57,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:58,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:58,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058133711] [2022-02-24 04:04:58,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058133711] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:58,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:58,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-24 04:04:58,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826847840] [2022-02-24 04:04:58,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:58,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-24 04:04:58,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-24 04:04:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1899, Invalid=2391, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 04:04:58,602 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 66 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:00,483 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-02-24 04:05:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-24 04:05:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (3), 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 72 [2022-02-24 04:05:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:00,488 INFO L225 Difference]: With dead ends: 79 [2022-02-24 04:05:00,488 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 04:05:00,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5813, Invalid=10699, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 04:05:00,490 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:00,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 04:05:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-02-24 04:05:00,494 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) [2022-02-24 04:05:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-02-24 04:05:00,495 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2022-02-24 04:05:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:00,495 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-02-24 04:05:00,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-02-24 04:05:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:05:00,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:00,496 INFO L514 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:00,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 04:05:00,496 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:00,496 INFO L85 PathProgramCache]: Analyzing trace with hash -480990330, now seen corresponding path program 61 times [2022-02-24 04:05:00,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:00,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559002146] [2022-02-24 04:05:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:00,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:00,657 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:00,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:02,285 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:02,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559002146] [2022-02-24 04:05:02,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [559002146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:02,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:02,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 04:05:02,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28890050] [2022-02-24 04:05:02,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:02,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 04:05:02,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:02,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 04:05:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=2461, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 04:05:02,287 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 67 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 65 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) [2022-02-24 04:05:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:04,191 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-02-24 04:05:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 04:05:04,192 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 65 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 [2022-02-24 04:05:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:04,192 INFO L225 Difference]: With dead ends: 80 [2022-02-24 04:05:04,192 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 04:05:04,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6001, Invalid=11029, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 04:05:04,194 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:04,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 04:05:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-02-24 04:05:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 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) [2022-02-24 04:05:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-02-24 04:05:04,200 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2022-02-24 04:05:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:04,200 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-02-24 04:05:04,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 65 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) [2022-02-24 04:05:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-02-24 04:05:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 04:05:04,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:04,201 INFO L514 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:04,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 04:05:04,202 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1990409512, now seen corresponding path program 62 times [2022-02-24 04:05:04,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:04,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608577447] [2022-02-24 04:05:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:04,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:04,367 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:04,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:06,082 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:06,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608577447] [2022-02-24 04:05:06,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608577447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:06,082 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:06,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-24 04:05:06,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233531491] [2022-02-24 04:05:06,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:06,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-24 04:05:06,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:06,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-24 04:05:06,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=2532, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 04:05:06,083 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 68 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 66 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:08,032 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2022-02-24 04:05:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-24 04:05:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 66 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 04:05:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:08,033 INFO L225 Difference]: With dead ends: 81 [2022-02-24 04:05:08,033 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 04:05:08,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6192, Invalid=11364, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 04:05:08,035 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:08,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 04:05:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-02-24 04:05:08,039 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) [2022-02-24 04:05:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-02-24 04:05:08,040 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2022-02-24 04:05:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:08,040 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-02-24 04:05:08,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 66 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-02-24 04:05:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 04:05:08,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:08,041 INFO L514 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:08,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 04:05:08,041 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:08,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:08,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1537763898, now seen corresponding path program 63 times [2022-02-24 04:05:08,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:08,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136734904] [2022-02-24 04:05:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:08,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:08,173 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:09,927 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:09,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136734904] [2022-02-24 04:05:09,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [136734904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:09,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:09,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 04:05:09,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425999203] [2022-02-24 04:05:09,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:09,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 04:05:09,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 04:05:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=2604, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 04:05:09,930 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 69 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 67 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) [2022-02-24 04:05:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:11,918 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-02-24 04:05:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 04:05:11,918 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 67 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 [2022-02-24 04:05:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:11,919 INFO L225 Difference]: With dead ends: 82 [2022-02-24 04:05:11,920 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 04:05:11,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6386, Invalid=11704, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 04:05:11,922 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:11,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 04:05:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-02-24 04:05:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-02-24 04:05:11,928 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2022-02-24 04:05:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:11,928 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-02-24 04:05:11,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 67 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) [2022-02-24 04:05:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-02-24 04:05:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 04:05:11,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:11,929 INFO L514 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:11,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 04:05:11,929 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash -390651752, now seen corresponding path program 64 times [2022-02-24 04:05:11,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:11,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801358935] [2022-02-24 04:05:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:11,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:12,104 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:13,886 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:13,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801358935] [2022-02-24 04:05:13,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801358935] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:13,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:13,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-24 04:05:13,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46563708] [2022-02-24 04:05:13,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:13,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-24 04:05:13,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:13,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-24 04:05:13,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2153, Invalid=2677, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 04:05:13,888 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 70 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 68 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:15,917 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2022-02-24 04:05:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-24 04:05:15,917 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 68 states have internal predecessors, (72), 2 states have call successors, (3), 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 76 [2022-02-24 04:05:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:15,918 INFO L225 Difference]: With dead ends: 83 [2022-02-24 04:05:15,918 INFO L226 Difference]: Without dead ends: 78 [2022-02-24 04:05:15,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2336 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6583, Invalid=12049, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 04:05:15,919 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:15,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-24 04:05:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-02-24 04:05:15,924 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) [2022-02-24 04:05:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-02-24 04:05:15,925 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2022-02-24 04:05:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:15,925 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-02-24 04:05:15,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 68 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-02-24 04:05:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 04:05:15,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:15,926 INFO L514 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:15,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 04:05:15,926 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash 810086406, now seen corresponding path program 65 times [2022-02-24 04:05:15,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:15,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547878606] [2022-02-24 04:05:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:15,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:16,055 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:17,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:17,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547878606] [2022-02-24 04:05:17,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [547878606] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:17,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:17,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-24 04:05:17,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875987587] [2022-02-24 04:05:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:17,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-24 04:05:17,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-24 04:05:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=2751, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 04:05:17,846 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 71 states, 71 states have (on average 1.028169014084507) internal successors, (73), 69 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) [2022-02-24 04:05:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:19,960 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-02-24 04:05:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 04:05:19,960 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.028169014084507) internal successors, (73), 69 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 [2022-02-24 04:05:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:19,961 INFO L225 Difference]: With dead ends: 84 [2022-02-24 04:05:19,961 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 04:05:19,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6783, Invalid=12399, Unknown=0, NotChecked=0, Total=19182 [2022-02-24 04:05:19,964 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:19,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 04:05:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-02-24 04:05:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 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) [2022-02-24 04:05:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-02-24 04:05:19,970 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2022-02-24 04:05:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:19,970 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-02-24 04:05:19,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.028169014084507) internal successors, (73), 69 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) [2022-02-24 04:05:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-02-24 04:05:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 04:05:19,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:19,971 INFO L514 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:19,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 04:05:19,971 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash -621736360, now seen corresponding path program 66 times [2022-02-24 04:05:19,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:19,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350283187] [2022-02-24 04:05:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:19,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:20,100 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:21,958 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:21,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350283187] [2022-02-24 04:05:21,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350283187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:21,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:21,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 04:05:21,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699632462] [2022-02-24 04:05:21,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:21,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 04:05:21,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 04:05:21,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2286, Invalid=2826, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 04:05:21,960 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 72 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 70 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:24,125 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-02-24 04:05:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 04:05:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 70 states have internal predecessors, (74), 2 states have call successors, (3), 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 78 [2022-02-24 04:05:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:24,126 INFO L225 Difference]: With dead ends: 85 [2022-02-24 04:05:24,126 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 04:05:24,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6986, Invalid=12754, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 04:05:24,127 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:24,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 04:05:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-02-24 04:05:24,132 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) [2022-02-24 04:05:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-02-24 04:05:24,133 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2022-02-24 04:05:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:24,133 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-02-24 04:05:24,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 70 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-02-24 04:05:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 04:05:24,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:24,134 INFO L514 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:24,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 04:05:24,134 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:24,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2058569146, now seen corresponding path program 67 times [2022-02-24 04:05:24,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:24,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431659966] [2022-02-24 04:05:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:24,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:24,271 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:24,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:26,210 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:26,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431659966] [2022-02-24 04:05:26,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [431659966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:26,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:26,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 04:05:26,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425832650] [2022-02-24 04:05:26,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:26,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 04:05:26,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 04:05:26,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2354, Invalid=2902, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 04:05:26,213 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 73 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 71 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) [2022-02-24 04:05:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:28,430 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-02-24 04:05:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 04:05:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 71 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 [2022-02-24 04:05:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:28,431 INFO L225 Difference]: With dead ends: 86 [2022-02-24 04:05:28,431 INFO L226 Difference]: Without dead ends: 81 [2022-02-24 04:05:28,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2546 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7192, Invalid=13114, Unknown=0, NotChecked=0, Total=20306 [2022-02-24 04:05:28,433 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:28,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-24 04:05:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-02-24 04:05:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 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) [2022-02-24 04:05:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-02-24 04:05:28,438 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2022-02-24 04:05:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:28,438 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-02-24 04:05:28,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 71 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) [2022-02-24 04:05:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-02-24 04:05:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 04:05:28,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:28,439 INFO L514 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:28,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 04:05:28,439 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash 644254744, now seen corresponding path program 68 times [2022-02-24 04:05:28,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:28,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395309919] [2022-02-24 04:05:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:28,572 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:28,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:30,538 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:30,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395309919] [2022-02-24 04:05:30,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [395309919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:30,538 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:30,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-24 04:05:30,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545818944] [2022-02-24 04:05:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:30,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-24 04:05:30,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-24 04:05:30,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=2979, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 04:05:30,540 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 74 states, 74 states have (on average 1.027027027027027) internal successors, (76), 72 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:32,796 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2022-02-24 04:05:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-24 04:05:32,796 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.027027027027027) internal successors, (76), 72 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-24 04:05:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:32,797 INFO L225 Difference]: With dead ends: 87 [2022-02-24 04:05:32,797 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 04:05:32,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7401, Invalid=13479, Unknown=0, NotChecked=0, Total=20880 [2022-02-24 04:05:32,798 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:32,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 04:05:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-24 04:05:32,804 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) [2022-02-24 04:05:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-02-24 04:05:32,804 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2022-02-24 04:05:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:32,804 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-02-24 04:05:32,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.027027027027027) internal successors, (76), 72 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-02-24 04:05:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 04:05:32,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:32,805 INFO L514 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:32,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 04:05:32,805 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1467550586, now seen corresponding path program 69 times [2022-02-24 04:05:32,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:32,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242739288] [2022-02-24 04:05:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:32,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:32,946 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:32,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:34,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:34,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242739288] [2022-02-24 04:05:34,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [242739288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:34,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:34,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 04:05:34,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047594963] [2022-02-24 04:05:34,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:34,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 04:05:34,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 04:05:34,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2493, Invalid=3057, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 04:05:34,983 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 75 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 73 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) [2022-02-24 04:05:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:37,320 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-02-24 04:05:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 04:05:37,320 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 73 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 [2022-02-24 04:05:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:37,320 INFO L225 Difference]: With dead ends: 88 [2022-02-24 04:05:37,320 INFO L226 Difference]: Without dead ends: 83 [2022-02-24 04:05:37,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7613, Invalid=13849, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 04:05:37,322 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:37,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-24 04:05:37,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-02-24 04:05:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-02-24 04:05:37,327 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2022-02-24 04:05:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:37,327 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-02-24 04:05:37,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 73 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) [2022-02-24 04:05:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-02-24 04:05:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 04:05:37,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:37,328 INFO L514 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:37,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 04:05:37,328 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:37,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1785960920, now seen corresponding path program 70 times [2022-02-24 04:05:37,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:37,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510109022] [2022-02-24 04:05:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:37,455 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:39,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:39,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510109022] [2022-02-24 04:05:39,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [510109022] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:39,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:39,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-24 04:05:39,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346543163] [2022-02-24 04:05:39,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:39,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-24 04:05:39,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-24 04:05:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2564, Invalid=3136, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 04:05:39,588 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 76 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 74 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:42,195 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-02-24 04:05:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-24 04:05:42,195 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 74 states have internal predecessors, (78), 2 states have call successors, (3), 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 82 [2022-02-24 04:05:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:42,195 INFO L225 Difference]: With dead ends: 89 [2022-02-24 04:05:42,195 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 04:05:42,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2765 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7828, Invalid=14224, Unknown=0, NotChecked=0, Total=22052 [2022-02-24 04:05:42,197 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:42,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:05:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 04:05:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-02-24 04:05:42,200 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) [2022-02-24 04:05:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-02-24 04:05:42,201 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2022-02-24 04:05:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:42,201 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-02-24 04:05:42,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 74 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-02-24 04:05:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 04:05:42,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:42,201 INFO L514 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:42,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 04:05:42,202 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:42,202 INFO L85 PathProgramCache]: Analyzing trace with hash -434397498, now seen corresponding path program 71 times [2022-02-24 04:05:42,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:42,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445871813] [2022-02-24 04:05:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:42,326 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:42,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:44,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:44,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445871813] [2022-02-24 04:05:44,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [445871813] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:44,452 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:44,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 04:05:44,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483200524] [2022-02-24 04:05:44,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:44,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 04:05:44,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:44,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 04:05:44,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2636, Invalid=3216, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 04:05:44,453 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 77 states, 77 states have (on average 1.025974025974026) internal successors, (79), 75 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) [2022-02-24 04:05:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:46,928 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-02-24 04:05:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 04:05:46,929 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.025974025974026) internal successors, (79), 75 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 [2022-02-24 04:05:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:46,929 INFO L225 Difference]: With dead ends: 90 [2022-02-24 04:05:46,929 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 04:05:46,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2840 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8046, Invalid=14604, Unknown=0, NotChecked=0, Total=22650 [2022-02-24 04:05:46,931 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:46,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:05:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 04:05:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-24 04:05:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 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) [2022-02-24 04:05:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-02-24 04:05:46,937 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2022-02-24 04:05:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:46,937 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-02-24 04:05:46,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.025974025974026) internal successors, (79), 75 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) [2022-02-24 04:05:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-02-24 04:05:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 04:05:46,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:46,938 INFO L514 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:46,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 04:05:46,938 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:46,938 INFO L85 PathProgramCache]: Analyzing trace with hash -546031720, now seen corresponding path program 72 times [2022-02-24 04:05:46,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:46,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103721048] [2022-02-24 04:05:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:46,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:47,073 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:47,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:49,189 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:49,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103721048] [2022-02-24 04:05:49,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1103721048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:49,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:49,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 04:05:49,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402254693] [2022-02-24 04:05:49,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:49,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 04:05:49,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 04:05:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=3297, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 04:05:49,191 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 78 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 76 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:51,676 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2022-02-24 04:05:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-24 04:05:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 76 states have internal predecessors, (80), 2 states have call successors, (3), 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 84 [2022-02-24 04:05:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:51,678 INFO L225 Difference]: With dead ends: 91 [2022-02-24 04:05:51,678 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 04:05:51,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2916 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8267, Invalid=14989, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 04:05:51,681 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:51,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 04:05:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-02-24 04:05:51,685 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) [2022-02-24 04:05:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-02-24 04:05:51,685 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2022-02-24 04:05:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:51,686 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-02-24 04:05:51,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 76 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-02-24 04:05:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 04:05:51,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:51,686 INFO L514 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:51,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 04:05:51,686 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:51,686 INFO L85 PathProgramCache]: Analyzing trace with hash 288274694, now seen corresponding path program 73 times [2022-02-24 04:05:51,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:51,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643712719] [2022-02-24 04:05:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:51,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:51,814 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:51,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:54,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:54,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643712719] [2022-02-24 04:05:54,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643712719] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:54,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:54,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 04:05:54,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897635003] [2022-02-24 04:05:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:54,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 04:05:54,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 04:05:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=3379, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 04:05:54,030 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 79 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 77 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) [2022-02-24 04:05:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:56,593 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-02-24 04:05:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 04:05:56,593 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 77 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 [2022-02-24 04:05:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:56,594 INFO L225 Difference]: With dead ends: 92 [2022-02-24 04:05:56,594 INFO L226 Difference]: Without dead ends: 87 [2022-02-24 04:05:56,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8491, Invalid=15379, Unknown=0, NotChecked=0, Total=23870 [2022-02-24 04:05:56,595 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:56,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:05:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-24 04:05:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-02-24 04:05:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 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) [2022-02-24 04:05:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-02-24 04:05:56,601 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2022-02-24 04:05:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:56,601 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-02-24 04:05:56,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 77 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) [2022-02-24 04:05:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-02-24 04:05:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 04:05:56,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:56,602 INFO L514 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:56,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 04:05:56,602 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:56,602 INFO L85 PathProgramCache]: Analyzing trace with hash 381969752, now seen corresponding path program 74 times [2022-02-24 04:05:56,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:56,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500226452] [2022-02-24 04:05:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:56,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:56,740 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:56,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:58,949 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:58,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500226452] [2022-02-24 04:05:58,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [500226452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:58,949 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:58,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-24 04:05:58,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70110981] [2022-02-24 04:05:58,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:58,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-24 04:05:58,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-24 04:05:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=3462, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 04:05:58,950 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 80 states, 80 states have (on average 1.025) internal successors, (82), 78 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:01,525 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-02-24 04:06:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-24 04:06:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.025) internal successors, (82), 78 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-24 04:06:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:01,526 INFO L225 Difference]: With dead ends: 93 [2022-02-24 04:06:01,526 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 04:06:01,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8718, Invalid=15774, Unknown=0, NotChecked=0, Total=24492 [2022-02-24 04:06:01,528 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:01,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 04:06:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-02-24 04:06:01,533 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) [2022-02-24 04:06:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-02-24 04:06:01,533 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2022-02-24 04:06:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:01,534 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-02-24 04:06:01,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.025) internal successors, (82), 78 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-02-24 04:06:01,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-24 04:06:01,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:01,534 INFO L514 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:01,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 04:06:01,535 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1008450746, now seen corresponding path program 75 times [2022-02-24 04:06:01,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:01,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709914402] [2022-02-24 04:06:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:01,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:01,667 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:01,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:04,003 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:04,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709914402] [2022-02-24 04:06:04,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [709914402] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:04,003 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:04,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 04:06:04,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372688677] [2022-02-24 04:06:04,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:04,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 04:06:04,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 04:06:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2934, Invalid=3546, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 04:06:04,005 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 81 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 79 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) [2022-02-24 04:06:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:06,625 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-02-24 04:06:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 04:06:06,625 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 79 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 [2022-02-24 04:06:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:06,626 INFO L225 Difference]: With dead ends: 94 [2022-02-24 04:06:06,626 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 04:06:06,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8948, Invalid=16174, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 04:06:06,627 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:06,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 04:06:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-02-24 04:06:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-02-24 04:06:06,631 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2022-02-24 04:06:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:06,631 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-02-24 04:06:06,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 79 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) [2022-02-24 04:06:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-02-24 04:06:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 04:06:06,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:06,631 INFO L514 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:06,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 04:06:06,632 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1161813224, now seen corresponding path program 76 times [2022-02-24 04:06:06,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:06,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223964176] [2022-02-24 04:06:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:06,764 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:06,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:09,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:09,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223964176] [2022-02-24 04:06:09,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1223964176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:09,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:09,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-24 04:06:09,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555462511] [2022-02-24 04:06:09,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:09,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-24 04:06:09,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-24 04:06:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3011, Invalid=3631, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 04:06:09,077 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 82 states, 82 states have (on average 1.024390243902439) internal successors, (84), 80 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:11,738 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-02-24 04:06:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-24 04:06:11,738 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.024390243902439) internal successors, (84), 80 states have internal predecessors, (84), 2 states have call successors, (3), 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 88 [2022-02-24 04:06:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:11,739 INFO L225 Difference]: With dead ends: 95 [2022-02-24 04:06:11,739 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 04:06:11,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9181, Invalid=16579, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 04:06:11,740 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:11,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 04:06:11,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-02-24 04:06:11,744 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) [2022-02-24 04:06:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-02-24 04:06:11,744 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2022-02-24 04:06:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:11,744 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-02-24 04:06:11,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.024390243902439) internal successors, (84), 80 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-02-24 04:06:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 04:06:11,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:11,745 INFO L514 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:11,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 04:06:11,745 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:11,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:11,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1621082746, now seen corresponding path program 77 times [2022-02-24 04:06:11,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:11,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438900851] [2022-02-24 04:06:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:11,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:11,890 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:14,292 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:14,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438900851] [2022-02-24 04:06:14,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [438900851] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:14,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:14,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 04:06:14,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780360336] [2022-02-24 04:06:14,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:14,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 04:06:14,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:14,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 04:06:14,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3089, Invalid=3717, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 04:06:14,293 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 83 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 81 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) [2022-02-24 04:06:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:17,063 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-02-24 04:06:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 04:06:17,063 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 81 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 [2022-02-24 04:06:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:17,063 INFO L225 Difference]: With dead ends: 96 [2022-02-24 04:06:17,063 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 04:06:17,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=9417, Invalid=16989, Unknown=0, NotChecked=0, Total=26406 [2022-02-24 04:06:17,065 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:17,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 04:06:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-02-24 04:06:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 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) [2022-02-24 04:06:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-02-24 04:06:17,069 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2022-02-24 04:06:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:17,069 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-02-24 04:06:17,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 81 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) [2022-02-24 04:06:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-02-24 04:06:17,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-24 04:06:17,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:17,069 INFO L514 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:17,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 04:06:17,069 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1321431256, now seen corresponding path program 78 times [2022-02-24 04:06:17,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:17,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399910147] [2022-02-24 04:06:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:17,202 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:17,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:19,646 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:19,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399910147] [2022-02-24 04:06:19,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399910147] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:19,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:19,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-24 04:06:19,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817656340] [2022-02-24 04:06:19,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:19,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-24 04:06:19,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-24 04:06:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3168, Invalid=3804, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 04:06:19,648 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 84 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:22,438 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2022-02-24 04:06:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-24 04:06:22,438 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (3), 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 90 [2022-02-24 04:06:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:22,439 INFO L225 Difference]: With dead ends: 97 [2022-02-24 04:06:22,439 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 04:06:22,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9656, Invalid=17404, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 04:06:22,440 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:22,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 04:06:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-02-24 04:06:22,444 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) [2022-02-24 04:06:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-02-24 04:06:22,444 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2022-02-24 04:06:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:22,444 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-02-24 04:06:22,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-02-24 04:06:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 04:06:22,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:22,445 INFO L514 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:22,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 04:06:22,445 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:22,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1949915194, now seen corresponding path program 79 times [2022-02-24 04:06:22,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:22,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230869230] [2022-02-24 04:06:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:22,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:22,573 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:25,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:25,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230869230] [2022-02-24 04:06:25,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [230869230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:25,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:25,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-24 04:06:25,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884788284] [2022-02-24 04:06:25,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:25,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-24 04:06:25,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-24 04:06:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=3892, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 04:06:25,044 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 85 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 83 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) [2022-02-24 04:06:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:27,885 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-02-24 04:06:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-24 04:06:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 83 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 [2022-02-24 04:06:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:27,886 INFO L225 Difference]: With dead ends: 98 [2022-02-24 04:06:27,886 INFO L226 Difference]: Without dead ends: 93 [2022-02-24 04:06:27,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3476 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9898, Invalid=17824, Unknown=0, NotChecked=0, Total=27722 [2022-02-24 04:06:27,887 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:27,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-24 04:06:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-24 04:06:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 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) [2022-02-24 04:06:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-02-24 04:06:27,891 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2022-02-24 04:06:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:27,891 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-02-24 04:06:27,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 83 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) [2022-02-24 04:06:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-02-24 04:06:27,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 04:06:27,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:27,892 INFO L514 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:27,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 04:06:27,892 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash -282440040, now seen corresponding path program 80 times [2022-02-24 04:06:27,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:27,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643895643] [2022-02-24 04:06:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:27,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:27,985 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:28,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:30,573 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:30,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643895643] [2022-02-24 04:06:30,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643895643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:30,574 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:30,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-24 04:06:30,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121540195] [2022-02-24 04:06:30,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:30,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-24 04:06:30,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-24 04:06:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3329, Invalid=3981, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 04:06:30,576 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 86 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:33,573 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2022-02-24 04:06:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-24 04:06:33,573 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-24 04:06:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:33,574 INFO L225 Difference]: With dead ends: 99 [2022-02-24 04:06:33,574 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 04:06:33,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3560 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=10143, Invalid=18249, Unknown=0, NotChecked=0, Total=28392 [2022-02-24 04:06:33,575 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:33,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:06:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 04:06:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-02-24 04:06:33,580 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) [2022-02-24 04:06:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-02-24 04:06:33,580 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2022-02-24 04:06:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:33,580 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-02-24 04:06:33,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-02-24 04:06:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 04:06:33,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:33,581 INFO L514 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:33,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 04:06:33,581 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash -130317818, now seen corresponding path program 81 times [2022-02-24 04:06:33,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:33,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224624665] [2022-02-24 04:06:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:33,714 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:33,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:36,336 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:36,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224624665] [2022-02-24 04:06:36,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224624665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:36,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:36,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 04:06:36,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538281741] [2022-02-24 04:06:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:36,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 04:06:36,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:36,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 04:06:36,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3411, Invalid=4071, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 04:06:36,338 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 87 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 85 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) [2022-02-24 04:06:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:39,322 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-02-24 04:06:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 04:06:39,322 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 85 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 [2022-02-24 04:06:39,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:39,323 INFO L225 Difference]: With dead ends: 100 [2022-02-24 04:06:39,323 INFO L226 Difference]: Without dead ends: 95 [2022-02-24 04:06:39,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3645 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=10391, Invalid=18679, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 04:06:39,325 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:39,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-24 04:06:39,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-02-24 04:06:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-02-24 04:06:39,330 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2022-02-24 04:06:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:39,330 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-02-24 04:06:39,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 85 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) [2022-02-24 04:06:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-02-24 04:06:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 04:06:39,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:39,330 INFO L514 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:39,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 04:06:39,330 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:39,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash 290503768, now seen corresponding path program 82 times [2022-02-24 04:06:39,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:39,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834005436] [2022-02-24 04:06:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:39,464 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:42,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:42,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834005436] [2022-02-24 04:06:42,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1834005436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:42,131 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:42,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-24 04:06:42,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693151795] [2022-02-24 04:06:42,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:42,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-24 04:06:42,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:42,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-24 04:06:42,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3494, Invalid=4162, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 04:06:42,133 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 88 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 86 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:45,179 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2022-02-24 04:06:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-24 04:06:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 86 states have internal predecessors, (90), 2 states have call successors, (3), 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 94 [2022-02-24 04:06:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:45,180 INFO L225 Difference]: With dead ends: 101 [2022-02-24 04:06:45,180 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 04:06:45,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3731 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=10642, Invalid=19114, Unknown=0, NotChecked=0, Total=29756 [2022-02-24 04:06:45,181 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:45,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 04:06:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-02-24 04:06:45,187 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) [2022-02-24 04:06:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-02-24 04:06:45,187 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2022-02-24 04:06:45,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:45,187 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-02-24 04:06:45,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 86 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-02-24 04:06:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-24 04:06:45,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:45,188 INFO L514 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:45,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 04:06:45,188 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 451071046, now seen corresponding path program 83 times [2022-02-24 04:06:45,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:45,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237532241] [2022-02-24 04:06:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:45,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:45,328 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:45,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:48,053 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:48,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237532241] [2022-02-24 04:06:48,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1237532241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:48,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:48,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-24 04:06:48,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121414839] [2022-02-24 04:06:48,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:48,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-24 04:06:48,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-24 04:06:48,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3578, Invalid=4254, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 04:06:48,055 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 89 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 87 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) [2022-02-24 04:06:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:51,180 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-02-24 04:06:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-24 04:06:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 87 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 [2022-02-24 04:06:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:51,181 INFO L225 Difference]: With dead ends: 102 [2022-02-24 04:06:51,181 INFO L226 Difference]: Without dead ends: 97 [2022-02-24 04:06:51,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3818 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=10896, Invalid=19554, Unknown=0, NotChecked=0, Total=30450 [2022-02-24 04:06:51,182 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:51,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-24 04:06:51,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-02-24 04:06:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 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) [2022-02-24 04:06:51,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-02-24 04:06:51,186 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2022-02-24 04:06:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:51,186 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-02-24 04:06:51,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 87 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) [2022-02-24 04:06:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-02-24 04:06:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 04:06:51,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:51,187 INFO L514 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:51,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 04:06:51,187 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:51,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1133689368, now seen corresponding path program 84 times [2022-02-24 04:06:51,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:51,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409254688] [2022-02-24 04:06:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:51,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:51,317 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:54,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:54,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409254688] [2022-02-24 04:06:54,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [409254688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:54,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:54,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-24 04:06:54,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954013270] [2022-02-24 04:06:54,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:54,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-24 04:06:54,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:54,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-24 04:06:54,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3663, Invalid=4347, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 04:06:54,077 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 90 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 88 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:57,272 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2022-02-24 04:06:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-24 04:06:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 88 states have internal predecessors, (92), 2 states have call successors, (3), 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 96 [2022-02-24 04:06:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:57,273 INFO L225 Difference]: With dead ends: 103 [2022-02-24 04:06:57,273 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 04:06:57,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=11153, Invalid=19999, Unknown=0, NotChecked=0, Total=31152 [2022-02-24 04:06:57,274 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:57,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:06:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 04:06:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-02-24 04:06:57,278 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) [2022-02-24 04:06:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-02-24 04:06:57,278 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2022-02-24 04:06:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:57,279 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-02-24 04:06:57,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 88 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-02-24 04:06:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 04:06:57,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:57,279 INFO L514 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:57,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 04:06:57,280 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:57,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:57,280 INFO L85 PathProgramCache]: Analyzing trace with hash 820020870, now seen corresponding path program 85 times [2022-02-24 04:06:57,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:57,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998083387] [2022-02-24 04:06:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:57,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:57,380 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:57,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:00,216 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:00,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998083387] [2022-02-24 04:07:00,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [998083387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:00,216 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:00,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-24 04:07:00,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447969179] [2022-02-24 04:07:00,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:00,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-24 04:07:00,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-24 04:07:00,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3749, Invalid=4441, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 04:07:00,218 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 91 states, 91 states have (on average 1.021978021978022) internal successors, (93), 89 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) [2022-02-24 04:07:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:03,446 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-02-24 04:07:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-24 04:07:03,447 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.021978021978022) internal successors, (93), 89 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 [2022-02-24 04:07:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:03,447 INFO L225 Difference]: With dead ends: 104 [2022-02-24 04:07:03,447 INFO L226 Difference]: Without dead ends: 99 [2022-02-24 04:07:03,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=11413, Invalid=20449, Unknown=0, NotChecked=0, Total=31862 [2022-02-24 04:07:03,450 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:03,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:07:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-24 04:07:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-02-24 04:07:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 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) [2022-02-24 04:07:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-02-24 04:07:03,463 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2022-02-24 04:07:03,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:03,464 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-02-24 04:07:03,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.021978021978022) internal successors, (93), 89 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) [2022-02-24 04:07:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-02-24 04:07:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-24 04:07:03,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:03,468 INFO L514 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:03,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 04:07:03,468 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash -313767976, now seen corresponding path program 86 times [2022-02-24 04:07:03,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:03,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478249238] [2022-02-24 04:07:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:03,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:03,612 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:03,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:06,470 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:06,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478249238] [2022-02-24 04:07:06,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [478249238] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:06,470 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:06,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-24 04:07:06,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623041553] [2022-02-24 04:07:06,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:06,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-24 04:07:06,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:06,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-24 04:07:06,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3836, Invalid=4536, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 04:07:06,472 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 92 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 90 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:09,833 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-02-24 04:07:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-24 04:07:09,833 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 90 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-02-24 04:07:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:09,834 INFO L225 Difference]: With dead ends: 105 [2022-02-24 04:07:09,834 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 04:07:09,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=11676, Invalid=20904, Unknown=0, NotChecked=0, Total=32580 [2022-02-24 04:07:09,836 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:09,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:07:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 04:07:09,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-24 04:07:09,840 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) [2022-02-24 04:07:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2022-02-24 04:07:09,840 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2022-02-24 04:07:09,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:09,840 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2022-02-24 04:07:09,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 90 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2022-02-24 04:07:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 04:07:09,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:09,841 INFO L514 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:09,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 04:07:09,841 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1101483834, now seen corresponding path program 87 times [2022-02-24 04:07:09,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:09,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547603056] [2022-02-24 04:07:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:09,981 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:10,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:12,933 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:12,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547603056] [2022-02-24 04:07:12,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547603056] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:12,933 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:12,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-24 04:07:12,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002113082] [2022-02-24 04:07:12,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:12,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-24 04:07:12,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-24 04:07:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3924, Invalid=4632, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 04:07:12,934 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 93 states, 93 states have (on average 1.021505376344086) internal successors, (95), 91 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) [2022-02-24 04:07:16,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:16,282 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-02-24 04:07:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-24 04:07:16,282 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.021505376344086) internal successors, (95), 91 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 [2022-02-24 04:07:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:16,283 INFO L225 Difference]: With dead ends: 106 [2022-02-24 04:07:16,283 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 04:07:16,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4176 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=11942, Invalid=21364, Unknown=0, NotChecked=0, Total=33306 [2022-02-24 04:07:16,284 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:16,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:07:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 04:07:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-24 04:07:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-02-24 04:07:16,289 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2022-02-24 04:07:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:16,289 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-02-24 04:07:16,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.021505376344086) internal successors, (95), 91 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) [2022-02-24 04:07:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-02-24 04:07:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-24 04:07:16,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:16,290 INFO L514 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:16,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 04:07:16,290 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:16,290 INFO L85 PathProgramCache]: Analyzing trace with hash 249128344, now seen corresponding path program 88 times [2022-02-24 04:07:16,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:16,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364211726] [2022-02-24 04:07:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:16,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:16,425 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:16,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:19,417 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:19,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364211726] [2022-02-24 04:07:19,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [364211726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:19,418 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:19,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-24 04:07:19,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812660368] [2022-02-24 04:07:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:19,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-24 04:07:19,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-24 04:07:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4013, Invalid=4729, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 04:07:19,419 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 94 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 92 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:22,893 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2022-02-24 04:07:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-24 04:07:22,893 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 92 states have internal predecessors, (96), 2 states have call successors, (3), 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 100 [2022-02-24 04:07:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:22,894 INFO L225 Difference]: With dead ends: 107 [2022-02-24 04:07:22,894 INFO L226 Difference]: Without dead ends: 102 [2022-02-24 04:07:22,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4268 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=12211, Invalid=21829, Unknown=0, NotChecked=0, Total=34040 [2022-02-24 04:07:22,896 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:22,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:07:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-24 04:07:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-02-24 04:07:22,900 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) [2022-02-24 04:07:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2022-02-24 04:07:22,900 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2022-02-24 04:07:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:22,900 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2022-02-24 04:07:22,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 92 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2022-02-24 04:07:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 04:07:22,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:22,901 INFO L514 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:22,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 04:07:22,901 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:22,901 INFO L85 PathProgramCache]: Analyzing trace with hash -831567098, now seen corresponding path program 89 times [2022-02-24 04:07:22,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:22,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257686160] [2022-02-24 04:07:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:22,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:23,056 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:23,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:26,119 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:26,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257686160] [2022-02-24 04:07:26,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257686160] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:26,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:26,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-02-24 04:07:26,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114498703] [2022-02-24 04:07:26,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:26,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-24 04:07:26,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:26,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-24 04:07:26,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4103, Invalid=4827, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 04:07:26,121 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 95 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 93 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) [2022-02-24 04:07:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:29,649 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-02-24 04:07:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-24 04:07:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 93 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 [2022-02-24 04:07:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:29,649 INFO L225 Difference]: With dead ends: 108 [2022-02-24 04:07:29,649 INFO L226 Difference]: Without dead ends: 103 [2022-02-24 04:07:29,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4361 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=12483, Invalid=22299, Unknown=0, NotChecked=0, Total=34782 [2022-02-24 04:07:29,651 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:29,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:07:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-24 04:07:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-02-24 04:07:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2022-02-24 04:07:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-02-24 04:07:29,655 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2022-02-24 04:07:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:29,655 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-02-24 04:07:29,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 93 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) [2022-02-24 04:07:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-02-24 04:07:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 04:07:29,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:29,656 INFO L514 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:29,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 04:07:29,656 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash 26612568, now seen corresponding path program 90 times [2022-02-24 04:07:29,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:29,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340813269] [2022-02-24 04:07:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:29,748 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:29,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:32,864 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:32,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340813269] [2022-02-24 04:07:32,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340813269] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:32,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:32,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-24 04:07:32,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385178669] [2022-02-24 04:07:32,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:32,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-24 04:07:32,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:32,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-24 04:07:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4194, Invalid=4926, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 04:07:32,866 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 94 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:36,490 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2022-02-24 04:07:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 04:07:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 94 states have internal predecessors, (98), 2 states have call successors, (3), 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 102 [2022-02-24 04:07:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:36,491 INFO L225 Difference]: With dead ends: 109 [2022-02-24 04:07:36,491 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 04:07:36,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4455 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=12758, Invalid=22774, Unknown=0, NotChecked=0, Total=35532 [2022-02-24 04:07:36,493 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:36,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:07:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 04:07:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-02-24 04:07:36,498 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) [2022-02-24 04:07:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-02-24 04:07:36,498 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2022-02-24 04:07:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:36,499 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-02-24 04:07:36,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 94 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-02-24 04:07:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-24 04:07:36,499 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:36,500 INFO L514 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:36,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 04:07:36,500 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash 860378438, now seen corresponding path program 91 times [2022-02-24 04:07:36,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:36,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829853661] [2022-02-24 04:07:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:36,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:36,601 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:36,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:39,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:39,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829853661] [2022-02-24 04:07:39,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [829853661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:39,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:39,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-24 04:07:39,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634380543] [2022-02-24 04:07:39,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:39,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-24 04:07:39,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:39,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-24 04:07:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4286, Invalid=5026, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 04:07:39,795 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 97 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 95 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) [2022-02-24 04:07:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:43,482 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-02-24 04:07:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-24 04:07:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 95 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 [2022-02-24 04:07:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:43,483 INFO L225 Difference]: With dead ends: 110 [2022-02-24 04:07:43,483 INFO L226 Difference]: Without dead ends: 105 [2022-02-24 04:07:43,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4550 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=13036, Invalid=23254, Unknown=0, NotChecked=0, Total=36290 [2022-02-24 04:07:43,485 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:43,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:07:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-24 04:07:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-02-24 04:07:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 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) [2022-02-24 04:07:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-02-24 04:07:43,492 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2022-02-24 04:07:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:43,492 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-02-24 04:07:43,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 95 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) [2022-02-24 04:07:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-02-24 04:07:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-24 04:07:43,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:43,493 INFO L514 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:43,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-24 04:07:43,493 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:43,493 INFO L85 PathProgramCache]: Analyzing trace with hash 937316632, now seen corresponding path program 92 times [2022-02-24 04:07:43,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:43,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570175065] [2022-02-24 04:07:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:43,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:43,664 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:43,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:46,922 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:46,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570175065] [2022-02-24 04:07:46,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570175065] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:46,922 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:46,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-24 04:07:46,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016594183] [2022-02-24 04:07:46,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:46,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-24 04:07:46,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-24 04:07:46,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4379, Invalid=5127, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 04:07:46,924 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 98 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 96 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:50,672 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2022-02-24 04:07:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-24 04:07:50,673 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 96 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-02-24 04:07:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:50,673 INFO L225 Difference]: With dead ends: 111 [2022-02-24 04:07:50,673 INFO L226 Difference]: Without dead ends: 106 [2022-02-24 04:07:50,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4646 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=13317, Invalid=23739, Unknown=0, NotChecked=0, Total=37056 [2022-02-24 04:07:50,675 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:50,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:07:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-24 04:07:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-02-24 04:07:50,681 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) [2022-02-24 04:07:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2022-02-24 04:07:50,681 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2022-02-24 04:07:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:50,682 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2022-02-24 04:07:50,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 96 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2022-02-24 04:07:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-24 04:07:50,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:50,682 INFO L514 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:50,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-24 04:07:50,683 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:50,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:50,683 INFO L85 PathProgramCache]: Analyzing trace with hash -972566650, now seen corresponding path program 93 times [2022-02-24 04:07:50,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:50,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378311353] [2022-02-24 04:07:50,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:50,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:50,817 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:50,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:54,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:54,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378311353] [2022-02-24 04:07:54,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1378311353] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:54,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:54,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-24 04:07:54,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298533544] [2022-02-24 04:07:54,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:54,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-24 04:07:54,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-24 04:07:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4473, Invalid=5229, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 04:07:54,142 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 99 states, 99 states have (on average 1.02020202020202) internal successors, (101), 97 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) [2022-02-24 04:07:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:57,979 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-02-24 04:07:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-24 04:07:57,980 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.02020202020202) internal successors, (101), 97 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 [2022-02-24 04:07:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:57,983 INFO L225 Difference]: With dead ends: 112 [2022-02-24 04:07:57,983 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 04:07:57,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4743 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=13601, Invalid=24229, Unknown=0, NotChecked=0, Total=37830 [2022-02-24 04:07:57,986 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:57,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:07:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 04:07:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-02-24 04:07:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-02-24 04:07:58,003 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2022-02-24 04:07:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:58,003 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-02-24 04:07:58,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.02020202020202) internal successors, (101), 97 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) [2022-02-24 04:07:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-02-24 04:07:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-24 04:07:58,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:58,004 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:58,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-24 04:07:58,004 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:58,005 INFO L85 PathProgramCache]: Analyzing trace with hash -49406248, now seen corresponding path program 94 times [2022-02-24 04:07:58,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:58,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465629164] [2022-02-24 04:07:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:58,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:58,180 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:58,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:08:01,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:01,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465629164] [2022-02-24 04:08:01,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465629164] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:01,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:01,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-24 04:08:01,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625019167] [2022-02-24 04:08:01,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:01,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-24 04:08:01,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:01,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-24 04:08:01,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4568, Invalid=5332, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 04:08:01,602 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 100 states, 100 states have (on average 1.02) internal successors, (102), 98 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:08:05,597 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2022-02-24 04:08:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-24 04:08:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.02) internal successors, (102), 98 states have internal predecessors, (102), 2 states have call successors, (3), 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 106 [2022-02-24 04:08:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:08:05,598 INFO L225 Difference]: With dead ends: 113 [2022-02-24 04:08:05,598 INFO L226 Difference]: Without dead ends: 108 [2022-02-24 04:08:05,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4841 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=13888, Invalid=24724, Unknown=0, NotChecked=0, Total=38612 [2022-02-24 04:08:05,601 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:08:05,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:08:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-24 04:08:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-02-24 04:08:05,607 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) [2022-02-24 04:08:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-02-24 04:08:05,607 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2022-02-24 04:08:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:08:05,607 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-02-24 04:08:05,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.02) internal successors, (102), 98 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-02-24 04:08:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-24 04:08:05,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:08:05,608 INFO L514 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:08:05,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-24 04:08:05,608 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:08:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:08:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1496204858, now seen corresponding path program 95 times [2022-02-24 04:08:05,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:08:05,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631737647] [2022-02-24 04:08:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:08:05,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:08:05,705 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:08:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:05,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:08:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:08:09,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:09,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631737647] [2022-02-24 04:08:09,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1631737647] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:09,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:09,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-24 04:08:09,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20677110] [2022-02-24 04:08:09,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:09,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-24 04:08:09,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-24 04:08:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4664, Invalid=5436, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 04:08:09,179 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 101 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 99 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) [2022-02-24 04:08:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:08:13,194 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-02-24 04:08:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-24 04:08:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 99 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 [2022-02-24 04:08:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:08:13,195 INFO L225 Difference]: With dead ends: 114 [2022-02-24 04:08:13,196 INFO L226 Difference]: Without dead ends: 109 [2022-02-24 04:08:13,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4940 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=14178, Invalid=25224, Unknown=0, NotChecked=0, Total=39402 [2022-02-24 04:08:13,197 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:08:13,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:08:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-24 04:08:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-02-24 04:08:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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) [2022-02-24 04:08:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-02-24 04:08:13,202 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2022-02-24 04:08:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:08:13,202 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-02-24 04:08:13,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 99 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) [2022-02-24 04:08:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-02-24 04:08:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-24 04:08:13,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:08:13,203 INFO L514 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:08:13,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-24 04:08:13,203 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:08:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:08:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash 897678488, now seen corresponding path program 96 times [2022-02-24 04:08:13,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:08:13,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113541041] [2022-02-24 04:08:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:08:13,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:08:13,300 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:08:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:13,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:08:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:08:16,815 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:16,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113541041] [2022-02-24 04:08:16,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113541041] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:16,816 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:16,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-24 04:08:16,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592789158] [2022-02-24 04:08:16,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:16,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-24 04:08:16,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-24 04:08:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4761, Invalid=5541, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 04:08:16,818 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 102 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 100 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:08:20,895 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2022-02-24 04:08:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-24 04:08:20,895 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 100 states have internal predecessors, (104), 2 states have call successors, (3), 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 108 [2022-02-24 04:08:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:08:20,896 INFO L225 Difference]: With dead ends: 115 [2022-02-24 04:08:20,896 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 04:08:20,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5040 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=14471, Invalid=25729, Unknown=0, NotChecked=0, Total=40200 [2022-02-24 04:08:20,897 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:08:20,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:08:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 04:08:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-02-24 04:08:20,902 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) [2022-02-24 04:08:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2022-02-24 04:08:20,902 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2022-02-24 04:08:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:08:20,902 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2022-02-24 04:08:20,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 100 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2022-02-24 04:08:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-24 04:08:20,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:08:20,903 INFO L514 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:08:20,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-24 04:08:20,904 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:08:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:08:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2093618182, now seen corresponding path program 97 times [2022-02-24 04:08:20,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:08:20,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853106889] [2022-02-24 04:08:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:08:20,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:08:21,057 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:08:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:21,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:08:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:08:24,879 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:24,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853106889] [2022-02-24 04:08:24,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [853106889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:24,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:24,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-02-24 04:08:24,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711700861] [2022-02-24 04:08:24,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:24,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-24 04:08:24,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:24,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-24 04:08:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4859, Invalid=5647, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 04:08:24,882 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 103 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 101 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) [2022-02-24 04:08:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:08:29,019 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-02-24 04:08:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-24 04:08:29,020 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 101 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 [2022-02-24 04:08:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:08:29,020 INFO L225 Difference]: With dead ends: 116 [2022-02-24 04:08:29,020 INFO L226 Difference]: Without dead ends: 111 [2022-02-24 04:08:29,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5141 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=14767, Invalid=26239, Unknown=0, NotChecked=0, Total=41006 [2022-02-24 04:08:29,022 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:08:29,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:08:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-24 04:08:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-02-24 04:08:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 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) [2022-02-24 04:08:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-02-24 04:08:29,027 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2022-02-24 04:08:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:08:29,027 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-02-24 04:08:29,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 101 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) [2022-02-24 04:08:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-02-24 04:08:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-24 04:08:29,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:08:29,028 INFO L514 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:08:29,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-24 04:08:29,028 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:08:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:08:29,028 INFO L85 PathProgramCache]: Analyzing trace with hash 513043032, now seen corresponding path program 98 times [2022-02-24 04:08:29,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:08:29,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692594838] [2022-02-24 04:08:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:08:29,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:08:29,163 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:08:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:29,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:08:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:08:32,816 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:32,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692594838] [2022-02-24 04:08:32,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [692594838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:32,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:32,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-24 04:08:32,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392529432] [2022-02-24 04:08:32,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:32,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-24 04:08:32,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:32,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-24 04:08:32,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4958, Invalid=5754, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 04:08:32,819 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 104 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 102 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:08:37,044 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2022-02-24 04:08:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-24 04:08:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 102 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-02-24 04:08:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:08:37,045 INFO L225 Difference]: With dead ends: 117 [2022-02-24 04:08:37,045 INFO L226 Difference]: Without dead ends: 112 [2022-02-24 04:08:37,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5243 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=15066, Invalid=26754, Unknown=0, NotChecked=0, Total=41820 [2022-02-24 04:08:37,047 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:08:37,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:08:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-24 04:08:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-02-24 04:08:37,051 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) [2022-02-24 04:08:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2022-02-24 04:08:37,051 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2022-02-24 04:08:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:08:37,051 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2022-02-24 04:08:37,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 102 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2022-02-24 04:08:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-24 04:08:37,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:08:37,052 INFO L514 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:08:37,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-24 04:08:37,052 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:08:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:08:37,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1240146362, now seen corresponding path program 99 times [2022-02-24 04:08:37,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:08:37,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468434421] [2022-02-24 04:08:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:08:37,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:08:37,198 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:08:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:37,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:08:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:08:40,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:40,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468434421] [2022-02-24 04:08:40,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [468434421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:40,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:40,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-24 04:08:40,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678858812] [2022-02-24 04:08:40,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:40,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-24 04:08:40,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-24 04:08:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5058, Invalid=5862, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 04:08:40,956 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 105 states, 105 states have (on average 1.019047619047619) internal successors, (107), 103 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) [2022-02-24 04:08:45,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:08:45,279 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-02-24 04:08:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-24 04:08:45,279 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.019047619047619) internal successors, (107), 103 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 [2022-02-24 04:08:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:08:45,281 INFO L225 Difference]: With dead ends: 118 [2022-02-24 04:08:45,281 INFO L226 Difference]: Without dead ends: 113 [2022-02-24 04:08:45,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5346 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=15368, Invalid=27274, Unknown=0, NotChecked=0, Total=42642 [2022-02-24 04:08:45,283 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:08:45,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:08:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-24 04:08:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-02-24 04:08:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-02-24 04:08:45,288 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2022-02-24 04:08:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:08:45,288 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-02-24 04:08:45,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.019047619047619) internal successors, (107), 103 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) [2022-02-24 04:08:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-02-24 04:08:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-02-24 04:08:45,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:08:45,289 INFO L514 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:08:45,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-24 04:08:45,289 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:08:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:08:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash 245557272, now seen corresponding path program 100 times [2022-02-24 04:08:45,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:08:45,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131990023] [2022-02-24 04:08:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:08:45,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:08:45,429 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:08:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:45,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:08:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:08:49,234 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:49,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131990023] [2022-02-24 04:08:49,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131990023] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:49,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:49,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-24 04:08:49,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456526403] [2022-02-24 04:08:49,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:49,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-24 04:08:49,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-24 04:08:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5159, Invalid=5971, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 04:08:49,236 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 106 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 104 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:08:53,684 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2022-02-24 04:08:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-24 04:08:53,684 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 104 states have internal predecessors, (108), 2 states have call successors, (3), 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 112 [2022-02-24 04:08:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:08:53,684 INFO L225 Difference]: With dead ends: 119 [2022-02-24 04:08:53,685 INFO L226 Difference]: Without dead ends: 114 [2022-02-24 04:08:53,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5450 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=15673, Invalid=27799, Unknown=0, NotChecked=0, Total=43472 [2022-02-24 04:08:53,687 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:08:53,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:08:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-24 04:08:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-02-24 04:08:53,693 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) [2022-02-24 04:08:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-02-24 04:08:53,693 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2022-02-24 04:08:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:08:53,693 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-02-24 04:08:53,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 104 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-02-24 04:08:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 04:08:53,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:08:53,694 INFO L514 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:08:53,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-24 04:08:53,695 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:08:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:08:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash -942270330, now seen corresponding path program 101 times [2022-02-24 04:08:53,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:08:53,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811261103] [2022-02-24 04:08:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:08:53,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:08:53,856 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:08:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:53,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:08:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:08:57,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:57,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811261103] [2022-02-24 04:08:57,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811261103] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:57,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:57,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-24 04:08:57,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881632251] [2022-02-24 04:08:57,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:57,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-24 04:08:57,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-24 04:08:57,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5261, Invalid=6081, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 04:08:57,754 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 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) [2022-02-24 04:09:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:09:02,258 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-02-24 04:09:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-24 04:09:02,258 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 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 [2022-02-24 04:09:02,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:09:02,259 INFO L225 Difference]: With dead ends: 120 [2022-02-24 04:09:02,259 INFO L226 Difference]: Without dead ends: 115 [2022-02-24 04:09:02,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5555 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=15981, Invalid=28329, Unknown=0, NotChecked=0, Total=44310 [2022-02-24 04:09:02,261 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:09:02,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:09:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-24 04:09:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-02-24 04:09:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 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) [2022-02-24 04:09:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-02-24 04:09:02,268 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2022-02-24 04:09:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:09:02,268 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-02-24 04:09:02,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 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) [2022-02-24 04:09:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-02-24 04:09:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-24 04:09:02,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:02,269 INFO L514 BasicCegarLoop]: trace histogram [102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:02,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-24 04:09:02,269 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:02,270 INFO L85 PathProgramCache]: Analyzing trace with hash 889779672, now seen corresponding path program 102 times [2022-02-24 04:09:02,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:02,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121982850] [2022-02-24 04:09:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:02,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:02,404 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:09:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:02,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:09:06,354 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:09:06,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121982850] [2022-02-24 04:09:06,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1121982850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:09:06,354 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:09:06,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-24 04:09:06,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330133326] [2022-02-24 04:09:06,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:09:06,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-24 04:09:06,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:09:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-24 04:09:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5364, Invalid=6192, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 04:09:06,356 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 108 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 106 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:09:10,984 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2022-02-24 04:09:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-24 04:09:10,985 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 106 states have internal predecessors, (110), 2 states have call successors, (3), 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 114 [2022-02-24 04:09:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:09:10,986 INFO L225 Difference]: With dead ends: 121 [2022-02-24 04:09:10,986 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 04:09:10,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5661 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=16292, Invalid=28864, Unknown=0, NotChecked=0, Total=45156 [2022-02-24 04:09:10,988 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:09:10,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:09:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 04:09:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-02-24 04:09:10,995 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) [2022-02-24 04:09:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2022-02-24 04:09:10,995 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2022-02-24 04:09:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:09:10,995 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2022-02-24 04:09:10,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 106 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2022-02-24 04:09:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-02-24 04:09:10,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:10,996 INFO L514 BasicCegarLoop]: trace histogram [103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:10,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-24 04:09:10,996 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1848754886, now seen corresponding path program 103 times [2022-02-24 04:09:10,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:10,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026412972] [2022-02-24 04:09:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:11,097 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:09:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:11,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:09:15,103 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:09:15,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026412972] [2022-02-24 04:09:15,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026412972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:09:15,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:09:15,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-02-24 04:09:15,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116163022] [2022-02-24 04:09:15,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:09:15,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-02-24 04:09:15,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:09:15,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-02-24 04:09:15,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5468, Invalid=6304, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 04:09:15,105 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand has 109 states, 109 states have (on average 1.018348623853211) internal successors, (111), 107 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) [2022-02-24 04:09:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:09:19,753 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-02-24 04:09:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-24 04:09:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.018348623853211) internal successors, (111), 107 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 [2022-02-24 04:09:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:09:19,754 INFO L225 Difference]: With dead ends: 122 [2022-02-24 04:09:19,754 INFO L226 Difference]: Without dead ends: 117 [2022-02-24 04:09:19,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5768 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=16606, Invalid=29404, Unknown=0, NotChecked=0, Total=46010 [2022-02-24 04:09:19,757 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:09:19,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:09:19,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-02-24 04:09:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-02-24 04:09:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 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) [2022-02-24 04:09:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-02-24 04:09:19,762 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2022-02-24 04:09:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:09:19,762 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-02-24 04:09:19,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.018348623853211) internal successors, (111), 107 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) [2022-02-24 04:09:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-02-24 04:09:19,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-24 04:09:19,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:19,762 INFO L514 BasicCegarLoop]: trace histogram [104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:19,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-24 04:09:19,763 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:19,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1512215448, now seen corresponding path program 104 times [2022-02-24 04:09:19,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:19,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962383000] [2022-02-24 04:09:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:19,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:19,866 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:09:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:19,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:09:23,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:09:23,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962383000] [2022-02-24 04:09:23,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [962383000] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:09:23,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:09:23,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-24 04:09:23,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134931992] [2022-02-24 04:09:23,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:09:23,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-24 04:09:23,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:09:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-24 04:09:23,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5573, Invalid=6417, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 04:09:23,980 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 110 states, 110 states have (on average 1.018181818181818) internal successors, (112), 108 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:09:28,745 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2022-02-24 04:09:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-24 04:09:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.018181818181818) internal successors, (112), 108 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-02-24 04:09:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:09:28,746 INFO L225 Difference]: With dead ends: 123 [2022-02-24 04:09:28,746 INFO L226 Difference]: Without dead ends: 118 [2022-02-24 04:09:28,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5876 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=16923, Invalid=29949, Unknown=0, NotChecked=0, Total=46872 [2022-02-24 04:09:28,748 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:09:28,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:09:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-24 04:09:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-02-24 04:09:28,753 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) [2022-02-24 04:09:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2022-02-24 04:09:28,753 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2022-02-24 04:09:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:09:28,754 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2022-02-24 04:09:28,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.018181818181818) internal successors, (112), 108 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2022-02-24 04:09:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-24 04:09:28,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:28,754 INFO L514 BasicCegarLoop]: trace histogram [105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:28,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-24 04:09:28,755 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:28,755 INFO L85 PathProgramCache]: Analyzing trace with hash -330572538, now seen corresponding path program 105 times [2022-02-24 04:09:28,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:28,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892215505] [2022-02-24 04:09:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:28,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:28,866 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:09:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:28,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:09:33,079 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:09:33,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892215505] [2022-02-24 04:09:33,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892215505] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:09:33,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:09:33,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-24 04:09:33,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877150175] [2022-02-24 04:09:33,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:09:33,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-24 04:09:33,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:09:33,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-24 04:09:33,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5679, Invalid=6531, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 04:09:33,082 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 111 states, 111 states have (on average 1.018018018018018) internal successors, (113), 109 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) [2022-02-24 04:09:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:09:37,926 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-02-24 04:09:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-24 04:09:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.018018018018018) internal successors, (113), 109 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 [2022-02-24 04:09:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:09:37,927 INFO L225 Difference]: With dead ends: 124 [2022-02-24 04:09:37,927 INFO L226 Difference]: Without dead ends: 119 [2022-02-24 04:09:37,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=17243, Invalid=30499, Unknown=0, NotChecked=0, Total=47742 [2022-02-24 04:09:37,929 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:09:37,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:09:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-24 04:09:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-02-24 04:09:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-02-24 04:09:37,949 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2022-02-24 04:09:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:09:37,950 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-02-24 04:09:37,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.018018018018018) internal successors, (113), 109 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) [2022-02-24 04:09:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-02-24 04:09:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-24 04:09:37,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:37,951 INFO L514 BasicCegarLoop]: trace histogram [106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:37,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-24 04:09:37,951 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:37,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:37,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1622425256, now seen corresponding path program 106 times [2022-02-24 04:09:37,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:37,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203617779] [2022-02-24 04:09:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:37,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:38,116 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:09:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:38,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:09:42,584 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:09:42,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203617779] [2022-02-24 04:09:42,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203617779] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:09:42,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:09:42,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-24 04:09:42,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830121705] [2022-02-24 04:09:42,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:09:42,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-24 04:09:42,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:09:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-24 04:09:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5786, Invalid=6646, Unknown=0, NotChecked=0, Total=12432 [2022-02-24 04:09:42,587 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 112 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 110 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:09:47,560 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2022-02-24 04:09:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-24 04:09:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 110 states have internal predecessors, (114), 2 states have call successors, (3), 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 118 [2022-02-24 04:09:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:09:47,561 INFO L225 Difference]: With dead ends: 125 [2022-02-24 04:09:47,561 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 04:09:47,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6095 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=17566, Invalid=31054, Unknown=0, NotChecked=0, Total=48620 [2022-02-24 04:09:47,563 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:09:47,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:09:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 04:09:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-02-24 04:09:47,567 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) [2022-02-24 04:09:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2022-02-24 04:09:47,568 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2022-02-24 04:09:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:09:47,568 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2022-02-24 04:09:47,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 110 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2022-02-24 04:09:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-24 04:09:47,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:47,569 INFO L514 BasicCegarLoop]: trace histogram [107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:47,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-24 04:09:47,569 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1279813446, now seen corresponding path program 107 times [2022-02-24 04:09:47,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:47,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636848706] [2022-02-24 04:09:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:47,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:47,705 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:09:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:47,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:09:52,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:09:52,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636848706] [2022-02-24 04:09:52,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1636848706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:09:52,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:09:52,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-24 04:09:52,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796467931] [2022-02-24 04:09:52,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:09:52,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-24 04:09:52,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:09:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-24 04:09:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5894, Invalid=6762, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 04:09:52,034 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand has 113 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 111 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) [2022-02-24 04:09:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:09:57,209 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-02-24 04:09:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-24 04:09:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 111 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 [2022-02-24 04:09:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:09:57,209 INFO L225 Difference]: With dead ends: 126 [2022-02-24 04:09:57,209 INFO L226 Difference]: Without dead ends: 121 [2022-02-24 04:09:57,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6206 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=17892, Invalid=31614, Unknown=0, NotChecked=0, Total=49506 [2022-02-24 04:09:57,212 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:09:57,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:09:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-24 04:09:57,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-02-24 04:09:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 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) [2022-02-24 04:09:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2022-02-24 04:09:57,219 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2022-02-24 04:09:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:09:57,219 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2022-02-24 04:09:57,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 111 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) [2022-02-24 04:09:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2022-02-24 04:09:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-24 04:09:57,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:57,220 INFO L514 BasicCegarLoop]: trace histogram [108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:57,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-24 04:09:57,220 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1054899992, now seen corresponding path program 108 times [2022-02-24 04:09:57,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:57,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926244516] [2022-02-24 04:09:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:57,331 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:09:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:57,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:10:01,750 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:01,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926244516] [2022-02-24 04:10:01,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [926244516] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:01,750 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:01,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-24 04:10:01,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965567031] [2022-02-24 04:10:01,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:01,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-24 04:10:01,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-24 04:10:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6003, Invalid=6879, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 04:10:01,753 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 114 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 112 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:06,991 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2022-02-24 04:10:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-24 04:10:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 112 states have internal predecessors, (116), 2 states have call successors, (3), 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 120 [2022-02-24 04:10:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:06,991 INFO L225 Difference]: With dead ends: 127 [2022-02-24 04:10:06,991 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 04:10:06,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6318 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=18221, Invalid=32179, Unknown=0, NotChecked=0, Total=50400 [2022-02-24 04:10:06,994 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:07,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:10:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 04:10:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-02-24 04:10:07,006 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) [2022-02-24 04:10:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2022-02-24 04:10:07,006 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2022-02-24 04:10:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:07,006 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2022-02-24 04:10:07,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 112 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2022-02-24 04:10:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-24 04:10:07,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:07,007 INFO L514 BasicCegarLoop]: trace histogram [109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:07,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-24 04:10:07,007 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1622449786, now seen corresponding path program 109 times [2022-02-24 04:10:07,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:07,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780128631] [2022-02-24 04:10:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:07,106 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:10:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:07,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:10:11,578 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:11,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780128631] [2022-02-24 04:10:11,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [780128631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:11,578 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:11,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-02-24 04:10:11,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012731622] [2022-02-24 04:10:11,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:11,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-24 04:10:11,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:11,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-24 04:10:11,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6113, Invalid=6997, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 04:10:11,580 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand has 115 states, 115 states have (on average 1.017391304347826) internal successors, (117), 113 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) [2022-02-24 04:10:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:16,868 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-02-24 04:10:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-24 04:10:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.017391304347826) internal successors, (117), 113 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 [2022-02-24 04:10:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:16,869 INFO L225 Difference]: With dead ends: 128 [2022-02-24 04:10:16,869 INFO L226 Difference]: Without dead ends: 123 [2022-02-24 04:10:16,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6431 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=18553, Invalid=32749, Unknown=0, NotChecked=0, Total=51302 [2022-02-24 04:10:16,872 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:16,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:10:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-24 04:10:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-02-24 04:10:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 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) [2022-02-24 04:10:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-02-24 04:10:16,879 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2022-02-24 04:10:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:16,879 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-02-24 04:10:16,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.017391304347826) internal successors, (117), 113 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) [2022-02-24 04:10:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-02-24 04:10:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-24 04:10:16,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:16,881 INFO L514 BasicCegarLoop]: trace histogram [110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:16,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-24 04:10:16,881 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1279053016, now seen corresponding path program 110 times [2022-02-24 04:10:16,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:16,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474764990] [2022-02-24 04:10:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:16,980 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:10:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:17,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:10:21,594 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:21,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474764990] [2022-02-24 04:10:21,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [474764990] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:21,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:21,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-24 04:10:21,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286358797] [2022-02-24 04:10:21,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:21,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-24 04:10:21,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:21,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-24 04:10:21,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6224, Invalid=7116, Unknown=0, NotChecked=0, Total=13340 [2022-02-24 04:10:21,596 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 116 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 114 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:26,974 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2022-02-24 04:10:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-24 04:10:26,974 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 114 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-02-24 04:10:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:26,975 INFO L225 Difference]: With dead ends: 129 [2022-02-24 04:10:26,975 INFO L226 Difference]: Without dead ends: 124 [2022-02-24 04:10:26,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6545 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=18888, Invalid=33324, Unknown=0, NotChecked=0, Total=52212 [2022-02-24 04:10:26,977 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:26,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:10:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-24 04:10:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-02-24 04:10:26,985 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) [2022-02-24 04:10:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2022-02-24 04:10:26,985 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2022-02-24 04:10:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:26,985 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2022-02-24 04:10:26,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 114 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2022-02-24 04:10:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-02-24 04:10:26,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:26,986 INFO L514 BasicCegarLoop]: trace histogram [111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:26,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-24 04:10:26,986 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:26,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1031326662, now seen corresponding path program 111 times [2022-02-24 04:10:26,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:26,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319127794] [2022-02-24 04:10:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:26,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:27,134 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:10:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:27,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:10:31,807 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:31,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319127794] [2022-02-24 04:10:31,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [319127794] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:31,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:31,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-24 04:10:31,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525375024] [2022-02-24 04:10:31,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:31,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-24 04:10:31,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:31,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-24 04:10:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6336, Invalid=7236, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 04:10:31,810 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand has 117 states, 117 states have (on average 1.017094017094017) internal successors, (119), 115 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) [2022-02-24 04:10:37,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:37,316 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-02-24 04:10:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-24 04:10:37,316 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.017094017094017) internal successors, (119), 115 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 [2022-02-24 04:10:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:37,317 INFO L225 Difference]: With dead ends: 130 [2022-02-24 04:10:37,317 INFO L226 Difference]: Without dead ends: 125 [2022-02-24 04:10:37,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6660 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=19226, Invalid=33904, Unknown=0, NotChecked=0, Total=53130 [2022-02-24 04:10:37,319 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:37,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:10:37,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-24 04:10:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-02-24 04:10:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2022-02-24 04:10:37,329 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2022-02-24 04:10:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:37,330 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2022-02-24 04:10:37,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.017094017094017) internal successors, (119), 115 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) [2022-02-24 04:10:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2022-02-24 04:10:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-24 04:10:37,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:37,331 INFO L514 BasicCegarLoop]: trace histogram [112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:37,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-24 04:10:37,331 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:37,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1941744280, now seen corresponding path program 112 times [2022-02-24 04:10:37,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:37,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623790448] [2022-02-24 04:10:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:37,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:37,498 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:10:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:37,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:10:42,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:42,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623790448] [2022-02-24 04:10:42,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623790448] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:42,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:42,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-02-24 04:10:42,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74819856] [2022-02-24 04:10:42,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:42,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-02-24 04:10:42,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-02-24 04:10:42,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6449, Invalid=7357, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 04:10:42,207 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 118 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 116 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:47,762 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2022-02-24 04:10:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-02-24 04:10:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 116 states have internal predecessors, (120), 2 states have call successors, (3), 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 124 [2022-02-24 04:10:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:47,763 INFO L225 Difference]: With dead ends: 131 [2022-02-24 04:10:47,763 INFO L226 Difference]: Without dead ends: 126 [2022-02-24 04:10:47,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6776 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=19567, Invalid=34489, Unknown=0, NotChecked=0, Total=54056 [2022-02-24 04:10:47,766 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:47,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:10:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-24 04:10:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-02-24 04:10:47,773 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) [2022-02-24 04:10:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2022-02-24 04:10:47,773 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2022-02-24 04:10:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:47,773 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2022-02-24 04:10:47,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 116 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2022-02-24 04:10:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-24 04:10:47,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:47,774 INFO L514 BasicCegarLoop]: trace histogram [113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:47,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-24 04:10:47,774 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:47,775 INFO L85 PathProgramCache]: Analyzing trace with hash 99919366, now seen corresponding path program 113 times [2022-02-24 04:10:47,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:47,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507905659] [2022-02-24 04:10:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:47,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:47,932 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:10:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:47,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:10:52,710 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:52,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507905659] [2022-02-24 04:10:52,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [507905659] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:52,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:52,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-24 04:10:52,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317120200] [2022-02-24 04:10:52,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:52,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-24 04:10:52,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-24 04:10:52,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6563, Invalid=7479, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 04:10:52,713 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand has 119 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 117 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) [2022-02-24 04:10:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:58,503 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-02-24 04:10:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-24 04:10:58,503 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 117 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 [2022-02-24 04:10:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:58,504 INFO L225 Difference]: With dead ends: 132 [2022-02-24 04:10:58,504 INFO L226 Difference]: Without dead ends: 127 [2022-02-24 04:10:58,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6893 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=19911, Invalid=35079, Unknown=0, NotChecked=0, Total=54990 [2022-02-24 04:10:58,506 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:58,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:10:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-24 04:10:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-02-24 04:10:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 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) [2022-02-24 04:10:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2022-02-24 04:10:58,512 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2022-02-24 04:10:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:58,512 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2022-02-24 04:10:58,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 117 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) [2022-02-24 04:10:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2022-02-24 04:10:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-24 04:10:58,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:58,512 INFO L514 BasicCegarLoop]: trace histogram [114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:58,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-24 04:10:58,513 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1162078120, now seen corresponding path program 114 times [2022-02-24 04:10:58,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:58,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561573301] [2022-02-24 04:10:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:58,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:58,638 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:10:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:58,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:11:03,528 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:11:03,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561573301] [2022-02-24 04:11:03,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [561573301] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:11:03,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:11:03,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-24 04:11:03,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224755197] [2022-02-24 04:11:03,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:11:03,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-24 04:11:03,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:11:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-24 04:11:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6678, Invalid=7602, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 04:11:03,530 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 120 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 118 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:11:09,455 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2022-02-24 04:11:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-24 04:11:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 118 states have internal predecessors, (122), 2 states have call successors, (3), 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 126 [2022-02-24 04:11:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:11:09,456 INFO L225 Difference]: With dead ends: 133 [2022-02-24 04:11:09,456 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 04:11:09,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7011 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=20258, Invalid=35674, Unknown=0, NotChecked=0, Total=55932 [2022-02-24 04:11:09,459 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:11:09,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:11:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 04:11:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-02-24 04:11:09,463 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) [2022-02-24 04:11:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2022-02-24 04:11:09,464 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2022-02-24 04:11:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:11:09,464 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2022-02-24 04:11:09,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 118 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2022-02-24 04:11:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-24 04:11:09,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:11:09,464 INFO L514 BasicCegarLoop]: trace histogram [115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:11:09,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-24 04:11:09,464 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:11:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:11:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1629294522, now seen corresponding path program 115 times [2022-02-24 04:11:09,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:11:09,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549535330] [2022-02-24 04:11:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:11:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:11:09,561 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:11:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:11:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:11:14,524 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:11:14,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549535330] [2022-02-24 04:11:14,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549535330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:11:14,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:11:14,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-02-24 04:11:14,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763897533] [2022-02-24 04:11:14,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:11:14,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-24 04:11:14,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:11:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-24 04:11:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6794, Invalid=7726, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 04:11:14,526 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand has 121 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 119 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) [2022-02-24 04:11:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:11:20,422 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-02-24 04:11:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-24 04:11:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 119 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 [2022-02-24 04:11:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:11:20,423 INFO L225 Difference]: With dead ends: 134 [2022-02-24 04:11:20,423 INFO L226 Difference]: Without dead ends: 129 [2022-02-24 04:11:20,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7130 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=20608, Invalid=36274, Unknown=0, NotChecked=0, Total=56882 [2022-02-24 04:11:20,425 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:11:20,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:11:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-24 04:11:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-02-24 04:11:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 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) [2022-02-24 04:11:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-02-24 04:11:20,430 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2022-02-24 04:11:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:11:20,430 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-02-24 04:11:20,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 119 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) [2022-02-24 04:11:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-02-24 04:11:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-24 04:11:20,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:11:20,431 INFO L514 BasicCegarLoop]: trace histogram [116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:11:20,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-24 04:11:20,431 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:11:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:11:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1066866200, now seen corresponding path program 116 times [2022-02-24 04:11:20,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:11:20,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711769732] [2022-02-24 04:11:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:11:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:11:20,531 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:11:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:20,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:11:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:11:25,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:11:25,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711769732] [2022-02-24 04:11:25,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1711769732] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:11:25,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:11:25,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-02-24 04:11:25,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753744334] [2022-02-24 04:11:25,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:11:25,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-02-24 04:11:25,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:11:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-02-24 04:11:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6911, Invalid=7851, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 04:11:25,678 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 122 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 120 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:11:31,652 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2022-02-24 04:11:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-02-24 04:11:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 120 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-02-24 04:11:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:11:31,652 INFO L225 Difference]: With dead ends: 135 [2022-02-24 04:11:31,652 INFO L226 Difference]: Without dead ends: 130 [2022-02-24 04:11:31,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7250 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=20961, Invalid=36879, Unknown=0, NotChecked=0, Total=57840 [2022-02-24 04:11:31,655 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:11:31,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:11:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-24 04:11:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-02-24 04:11:31,659 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) [2022-02-24 04:11:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2022-02-24 04:11:31,660 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2022-02-24 04:11:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:11:31,660 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2022-02-24 04:11:31,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 120 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2022-02-24 04:11:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 04:11:31,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:11:31,661 INFO L514 BasicCegarLoop]: trace histogram [117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:11:31,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-24 04:11:31,661 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:11:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:11:31,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1251497338, now seen corresponding path program 117 times [2022-02-24 04:11:31,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:11:31,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193129005] [2022-02-24 04:11:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:11:31,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:11:31,803 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:11:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:11:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:11:36,974 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:11:36,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193129005] [2022-02-24 04:11:36,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193129005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:11:36,974 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:11:36,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-02-24 04:11:36,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784618214] [2022-02-24 04:11:36,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:11:36,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-02-24 04:11:36,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:11:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-02-24 04:11:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7029, Invalid=7977, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 04:11:36,976 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand has 123 states, 123 states have (on average 1.016260162601626) internal successors, (125), 121 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) [2022-02-24 04:11:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:11:43,125 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-02-24 04:11:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-24 04:11:43,125 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.016260162601626) internal successors, (125), 121 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 [2022-02-24 04:11:43,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:11:43,125 INFO L225 Difference]: With dead ends: 136 [2022-02-24 04:11:43,125 INFO L226 Difference]: Without dead ends: 131 [2022-02-24 04:11:43,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7371 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=21317, Invalid=37489, Unknown=0, NotChecked=0, Total=58806 [2022-02-24 04:11:43,128 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:11:43,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:11:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-24 04:11:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-02-24 04:11:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2022-02-24 04:11:43,133 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2022-02-24 04:11:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:11:43,133 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2022-02-24 04:11:43,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.016260162601626) internal successors, (125), 121 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) [2022-02-24 04:11:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2022-02-24 04:11:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-02-24 04:11:43,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:11:43,134 INFO L514 BasicCegarLoop]: trace histogram [118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:11:43,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-24 04:11:43,134 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:11:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:11:43,134 INFO L85 PathProgramCache]: Analyzing trace with hash -106322984, now seen corresponding path program 118 times [2022-02-24 04:11:43,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:11:43,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554799187] [2022-02-24 04:11:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:11:43,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:11:43,283 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:11:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:43,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:11:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:11:48,496 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:11:48,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554799187] [2022-02-24 04:11:48,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [554799187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:11:48,496 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:11:48,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-24 04:11:48,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496407547] [2022-02-24 04:11:48,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:11:48,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-24 04:11:48,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:11:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-24 04:11:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7148, Invalid=8104, Unknown=0, NotChecked=0, Total=15252 [2022-02-24 04:11:48,499 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 124 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 122 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:11:54,688 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2022-02-24 04:11:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-24 04:11:54,688 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 122 states have internal predecessors, (126), 2 states have call successors, (3), 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 130 [2022-02-24 04:11:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:11:54,688 INFO L225 Difference]: With dead ends: 137 [2022-02-24 04:11:54,688 INFO L226 Difference]: Without dead ends: 132 [2022-02-24 04:11:54,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7493 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=21676, Invalid=38104, Unknown=0, NotChecked=0, Total=59780 [2022-02-24 04:11:54,691 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:11:54,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:11:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-24 04:11:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-02-24 04:11:54,699 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) [2022-02-24 04:11:54,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2022-02-24 04:11:54,699 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2022-02-24 04:11:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:11:54,699 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2022-02-24 04:11:54,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 122 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2022-02-24 04:11:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-02-24 04:11:54,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:11:54,700 INFO L514 BasicCegarLoop]: trace histogram [119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:11:54,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-24 04:11:54,700 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:11:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:11:54,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1034343622, now seen corresponding path program 119 times [2022-02-24 04:11:54,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:11:54,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530643082] [2022-02-24 04:11:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:11:54,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:11:54,798 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:11:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:54,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:11:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:12:00,096 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:12:00,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530643082] [2022-02-24 04:12:00,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [530643082] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:12:00,096 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:12:00,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-02-24 04:12:00,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084365028] [2022-02-24 04:12:00,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:12:00,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-02-24 04:12:00,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:12:00,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-02-24 04:12:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7268, Invalid=8232, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 04:12:00,099 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand has 125 states, 125 states have (on average 1.016) internal successors, (127), 123 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) [2022-02-24 04:12:06,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:12:06,390 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-02-24 04:12:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-02-24 04:12:06,390 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.016) internal successors, (127), 123 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 [2022-02-24 04:12:06,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:12:06,391 INFO L225 Difference]: With dead ends: 138 [2022-02-24 04:12:06,391 INFO L226 Difference]: Without dead ends: 133 [2022-02-24 04:12:06,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7616 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=22038, Invalid=38724, Unknown=0, NotChecked=0, Total=60762 [2022-02-24 04:12:06,394 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:12:06,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:12:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-24 04:12:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-02-24 04:12:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 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) [2022-02-24 04:12:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-02-24 04:12:06,402 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2022-02-24 04:12:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:12:06,402 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-02-24 04:12:06,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.016) internal successors, (127), 123 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) [2022-02-24 04:12:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-02-24 04:12:06,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-24 04:12:06,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:12:06,403 INFO L514 BasicCegarLoop]: trace histogram [120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:12:06,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-24 04:12:06,403 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:12:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:12:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2035270040, now seen corresponding path program 120 times [2022-02-24 04:12:06,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:12:06,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220382614] [2022-02-24 04:12:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:12:06,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:12:06,607 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:12:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:06,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:12:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:12:12,030 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:12:12,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220382614] [2022-02-24 04:12:12,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1220382614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:12:12,031 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:12:12,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-24 04:12:12,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53787244] [2022-02-24 04:12:12,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:12:12,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-24 04:12:12,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:12:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-24 04:12:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7389, Invalid=8361, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 04:12:12,033 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 126 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 124 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:12:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:12:18,438 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2022-02-24 04:12:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-24 04:12:18,438 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 124 states have internal predecessors, (128), 2 states have call successors, (3), 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 132 [2022-02-24 04:12:18,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:12:18,439 INFO L225 Difference]: With dead ends: 139 [2022-02-24 04:12:18,439 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 04:12:18,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7740 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=22403, Invalid=39349, Unknown=0, NotChecked=0, Total=61752 [2022-02-24 04:12:18,441 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:12:18,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:12:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 04:12:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-02-24 04:12:18,446 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) [2022-02-24 04:12:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2022-02-24 04:12:18,446 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2022-02-24 04:12:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:12:18,446 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2022-02-24 04:12:18,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 124 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:12:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2022-02-24 04:12:18,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-24 04:12:18,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:12:18,447 INFO L514 BasicCegarLoop]: trace histogram [121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:12:18,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-24 04:12:18,447 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:12:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:12:18,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1295749370, now seen corresponding path program 121 times [2022-02-24 04:12:18,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:12:18,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126226680] [2022-02-24 04:12:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:12:18,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:12:18,547 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:12:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:18,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:12:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:12:24,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:12:24,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126226680] [2022-02-24 04:12:24,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126226680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:12:24,015 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:12:24,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-02-24 04:12:24,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514092529] [2022-02-24 04:12:24,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:12:24,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-02-24 04:12:24,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:12:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-02-24 04:12:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7511, Invalid=8491, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 04:12:24,017 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 127 states, 127 states have (on average 1.015748031496063) internal successors, (129), 125 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) [2022-02-24 04:12:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:12:30,574 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-02-24 04:12:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-24 04:12:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.015748031496063) internal successors, (129), 125 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 [2022-02-24 04:12:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:12:30,575 INFO L225 Difference]: With dead ends: 140 [2022-02-24 04:12:30,575 INFO L226 Difference]: Without dead ends: 135 [2022-02-24 04:12:30,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7865 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=22771, Invalid=39979, Unknown=0, NotChecked=0, Total=62750 [2022-02-24 04:12:30,577 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:12:30,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:12:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-24 04:12:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-02-24 04:12:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 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) [2022-02-24 04:12:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2022-02-24 04:12:30,582 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2022-02-24 04:12:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:12:30,582 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2022-02-24 04:12:30,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.015748031496063) internal successors, (129), 125 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) [2022-02-24 04:12:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2022-02-24 04:12:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-24 04:12:30,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:12:30,583 INFO L514 BasicCegarLoop]: trace histogram [122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:12:30,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-24 04:12:30,583 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:12:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:12:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1478135976, now seen corresponding path program 122 times [2022-02-24 04:12:30,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:12:30,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403889750] [2022-02-24 04:12:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:12:30,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:12:30,743 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:12:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:30,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:12:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:12:36,303 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:12:36,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403889750] [2022-02-24 04:12:36,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [403889750] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:12:36,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:12:36,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-02-24 04:12:36,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070604298] [2022-02-24 04:12:36,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:12:36,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-02-24 04:12:36,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:12:36,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-02-24 04:12:36,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7634, Invalid=8622, Unknown=0, NotChecked=0, Total=16256 [2022-02-24 04:12:36,305 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 128 states, 128 states have (on average 1.015625) internal successors, (130), 126 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:12:42,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:12:42,946 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2022-02-24 04:12:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-24 04:12:42,946 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.015625) internal successors, (130), 126 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-24 04:12:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:12:42,947 INFO L225 Difference]: With dead ends: 141 [2022-02-24 04:12:42,947 INFO L226 Difference]: Without dead ends: 136 [2022-02-24 04:12:42,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7991 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=23142, Invalid=40614, Unknown=0, NotChecked=0, Total=63756 [2022-02-24 04:12:42,950 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:12:42,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:12:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-24 04:12:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-02-24 04:12:42,957 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) [2022-02-24 04:12:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-02-24 04:12:42,957 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2022-02-24 04:12:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:12:42,957 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-02-24 04:12:42,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.015625) internal successors, (130), 126 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:12:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-02-24 04:12:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-24 04:12:42,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:12:42,958 INFO L514 BasicCegarLoop]: trace histogram [123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:12:42,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-24 04:12:42,958 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:12:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:12:42,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1457813830, now seen corresponding path program 123 times [2022-02-24 04:12:42,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:12:42,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993345131] [2022-02-24 04:12:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:12:42,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:12:43,113 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:12:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:43,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:12:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:12:48,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:12:48,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993345131] [2022-02-24 04:12:48,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [993345131] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:12:48,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:12:48,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-02-24 04:12:48,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830921537] [2022-02-24 04:12:48,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:12:48,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-02-24 04:12:48,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:12:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-02-24 04:12:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7758, Invalid=8754, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 04:12:48,748 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 129 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 127 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) [2022-02-24 04:12:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:12:55,521 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-02-24 04:12:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-24 04:12:55,521 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 127 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 [2022-02-24 04:12:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:12:55,522 INFO L225 Difference]: With dead ends: 142 [2022-02-24 04:12:55,522 INFO L226 Difference]: Without dead ends: 137 [2022-02-24 04:12:55,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8118 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=23516, Invalid=41254, Unknown=0, NotChecked=0, Total=64770 [2022-02-24 04:12:55,525 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:12:55,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:12:55,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-24 04:12:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-02-24 04:12:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:12:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2022-02-24 04:12:55,530 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2022-02-24 04:12:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:12:55,530 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2022-02-24 04:12:55,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 127 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) [2022-02-24 04:12:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2022-02-24 04:12:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-02-24 04:12:55,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:12:55,531 INFO L514 BasicCegarLoop]: trace histogram [124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:12:55,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-24 04:12:55,531 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:12:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:12:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2017022696, now seen corresponding path program 124 times [2022-02-24 04:12:55,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:12:55,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617303948] [2022-02-24 04:12:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:12:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:12:55,675 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:12:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:55,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:12:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:13:01,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:13:01,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617303948] [2022-02-24 04:13:01,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617303948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:13:01,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:13:01,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-02-24 04:13:01,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652600630] [2022-02-24 04:13:01,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:13:01,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-02-24 04:13:01,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:13:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-02-24 04:13:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7883, Invalid=8887, Unknown=0, NotChecked=0, Total=16770 [2022-02-24 04:13:01,402 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 130 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 128 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:13:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:13:08,407 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2022-02-24 04:13:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-02-24 04:13:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 128 states have internal predecessors, (132), 2 states have call successors, (3), 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 136 [2022-02-24 04:13:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:13:08,409 INFO L225 Difference]: With dead ends: 143 [2022-02-24 04:13:08,409 INFO L226 Difference]: Without dead ends: 138 [2022-02-24 04:13:08,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8246 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=23893, Invalid=41899, Unknown=0, NotChecked=0, Total=65792 [2022-02-24 04:13:08,412 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:13:08,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:13:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-24 04:13:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-02-24 04:13:08,416 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) [2022-02-24 04:13:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2022-02-24 04:13:08,417 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2022-02-24 04:13:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:13:08,417 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2022-02-24 04:13:08,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 128 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:13:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2022-02-24 04:13:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-24 04:13:08,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:13:08,418 INFO L514 BasicCegarLoop]: trace histogram [125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:13:08,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-24 04:13:08,418 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:13:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:13:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1932194694, now seen corresponding path program 125 times [2022-02-24 04:13:08,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:13:08,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265348668] [2022-02-24 04:13:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:13:08,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:13:08,571 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:13:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:08,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:13:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:13:14,557 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:13:14,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265348668] [2022-02-24 04:13:14,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [265348668] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:13:14,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:13:14,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-02-24 04:13:14,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131460196] [2022-02-24 04:13:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:13:14,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-02-24 04:13:14,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:13:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-02-24 04:13:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8009, Invalid=9021, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 04:13:14,560 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand has 131 states, 131 states have (on average 1.015267175572519) internal successors, (133), 129 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) [2022-02-24 04:13:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:13:21,486 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-02-24 04:13:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-24 04:13:21,486 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.015267175572519) internal successors, (133), 129 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 [2022-02-24 04:13:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:13:21,487 INFO L225 Difference]: With dead ends: 144 [2022-02-24 04:13:21,487 INFO L226 Difference]: Without dead ends: 139 [2022-02-24 04:13:21,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8375 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=24273, Invalid=42549, Unknown=0, NotChecked=0, Total=66822 [2022-02-24 04:13:21,489 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:13:21,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:13:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-24 04:13:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-02-24 04:13:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 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) [2022-02-24 04:13:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-02-24 04:13:21,494 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2022-02-24 04:13:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:13:21,495 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-02-24 04:13:21,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.015267175572519) internal successors, (133), 129 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) [2022-02-24 04:13:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-02-24 04:13:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-24 04:13:21,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:13:21,495 INFO L514 BasicCegarLoop]: trace histogram [126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:13:21,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-24 04:13:21,495 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:13:21,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:13:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash -196117800, now seen corresponding path program 126 times [2022-02-24 04:13:21,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:13:21,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409377910] [2022-02-24 04:13:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:13:21,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:13:21,598 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:13:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:21,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:13:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:13:27,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:13:27,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409377910] [2022-02-24 04:13:27,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409377910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:13:27,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:13:27,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-24 04:13:27,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272670400] [2022-02-24 04:13:27,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:13:27,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-24 04:13:27,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:13:27,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-24 04:13:27,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8136, Invalid=9156, Unknown=0, NotChecked=0, Total=17292 [2022-02-24 04:13:27,493 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 132 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 130 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:13:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:13:34,487 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2022-02-24 04:13:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-24 04:13:34,488 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 130 states have internal predecessors, (134), 2 states have call successors, (3), 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 138 [2022-02-24 04:13:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:13:34,488 INFO L225 Difference]: With dead ends: 145 [2022-02-24 04:13:34,488 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 04:13:34,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=24656, Invalid=43204, Unknown=0, NotChecked=0, Total=67860 [2022-02-24 04:13:34,491 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:13:34,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:13:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 04:13:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-02-24 04:13:34,497 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) [2022-02-24 04:13:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2022-02-24 04:13:34,497 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2022-02-24 04:13:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:13:34,497 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2022-02-24 04:13:34,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 130 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:13:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2022-02-24 04:13:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-24 04:13:34,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:13:34,498 INFO L514 BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:13:34,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-24 04:13:34,498 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:13:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:13:34,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1749295674, now seen corresponding path program 127 times [2022-02-24 04:13:34,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:13:34,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482358449] [2022-02-24 04:13:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:13:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:13:34,616 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:13:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:34,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:13:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:13:40,585 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:13:40,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482358449] [2022-02-24 04:13:40,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1482358449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:13:40,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:13:40,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-02-24 04:13:40,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016768622] [2022-02-24 04:13:40,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:13:40,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-02-24 04:13:40,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:13:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-02-24 04:13:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8264, Invalid=9292, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 04:13:40,590 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand has 133 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 131 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) [2022-02-24 04:13:47,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:13:47,745 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-02-24 04:13:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-02-24 04:13:47,746 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 131 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 [2022-02-24 04:13:47,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:13:47,746 INFO L225 Difference]: With dead ends: 146 [2022-02-24 04:13:47,746 INFO L226 Difference]: Without dead ends: 141 [2022-02-24 04:13:47,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8636 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=25042, Invalid=43864, Unknown=0, NotChecked=0, Total=68906 [2022-02-24 04:13:47,750 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:13:47,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:13:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-24 04:13:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-02-24 04:13:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 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) [2022-02-24 04:13:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2022-02-24 04:13:47,756 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2022-02-24 04:13:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:13:47,756 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2022-02-24 04:13:47,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 131 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) [2022-02-24 04:13:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2022-02-24 04:13:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-24 04:13:47,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:13:47,757 INFO L514 BasicCegarLoop]: trace histogram [128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:13:47,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-24 04:13:47,757 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:13:47,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:13:47,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1641797784, now seen corresponding path program 128 times [2022-02-24 04:13:47,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:13:47,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443599866] [2022-02-24 04:13:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:13:47,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:13:47,917 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:13:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:47,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:13:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:13:54,001 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:13:54,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443599866] [2022-02-24 04:13:54,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [443599866] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:13:54,001 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:13:54,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-24 04:13:54,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149860807] [2022-02-24 04:13:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:13:54,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-24 04:13:54,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:13:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-24 04:13:54,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8393, Invalid=9429, Unknown=0, NotChecked=0, Total=17822 [2022-02-24 04:13:54,004 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 134 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 132 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:14:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:01,231 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2022-02-24 04:14:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-24 04:14:01,232 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 132 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-02-24 04:14:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:01,232 INFO L225 Difference]: With dead ends: 147 [2022-02-24 04:14:01,232 INFO L226 Difference]: Without dead ends: 142 [2022-02-24 04:14:01,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8768 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=25431, Invalid=44529, Unknown=0, NotChecked=0, Total=69960 [2022-02-24 04:14:01,235 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:01,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:14:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-24 04:14:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-02-24 04:14:01,240 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) [2022-02-24 04:14:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2022-02-24 04:14:01,241 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2022-02-24 04:14:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:01,241 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2022-02-24 04:14:01,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 132 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:14:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2022-02-24 04:14:01,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-24 04:14:01,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:01,242 INFO L514 BasicCegarLoop]: trace histogram [129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:14:01,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-24 04:14:01,242 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash -608487418, now seen corresponding path program 129 times [2022-02-24 04:14:01,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:01,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533274471] [2022-02-24 04:14:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:01,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:01,387 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:14:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:01,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:14:07,549 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:07,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533274471] [2022-02-24 04:14:07,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [533274471] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:07,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:07,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-02-24 04:14:07,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008755733] [2022-02-24 04:14:07,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:07,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-02-24 04:14:07,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:07,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-02-24 04:14:07,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8523, Invalid=9567, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 04:14:07,554 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand has 135 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 133 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) [2022-02-24 04:14:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:14,946 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-02-24 04:14:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-02-24 04:14:14,947 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 133 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 [2022-02-24 04:14:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:14,947 INFO L225 Difference]: With dead ends: 148 [2022-02-24 04:14:14,947 INFO L226 Difference]: Without dead ends: 143 [2022-02-24 04:14:14,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8901 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=25823, Invalid=45199, Unknown=0, NotChecked=0, Total=71022 [2022-02-24 04:14:14,950 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:14,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:14:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-24 04:14:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-02-24 04:14:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:14:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-02-24 04:14:14,955 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2022-02-24 04:14:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:14,955 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-02-24 04:14:14,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 133 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) [2022-02-24 04:14:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-02-24 04:14:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-02-24 04:14:14,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:14,955 INFO L514 BasicCegarLoop]: trace histogram [130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:14:14,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-24 04:14:14,956 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1647851944, now seen corresponding path program 130 times [2022-02-24 04:14:14,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:14,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977874633] [2022-02-24 04:14:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:15,121 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:14:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:15,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:14:21,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:21,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977874633] [2022-02-24 04:14:21,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977874633] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:21,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:21,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-02-24 04:14:21,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23423640] [2022-02-24 04:14:21,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:21,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-02-24 04:14:21,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-02-24 04:14:21,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8654, Invalid=9706, Unknown=0, NotChecked=0, Total=18360 [2022-02-24 04:14:21,363 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 136 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 134 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:14:28,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:28,852 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2022-02-24 04:14:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-02-24 04:14:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 134 states have internal predecessors, (138), 2 states have call successors, (3), 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 142 [2022-02-24 04:14:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:28,853 INFO L225 Difference]: With dead ends: 149 [2022-02-24 04:14:28,853 INFO L226 Difference]: Without dead ends: 144 [2022-02-24 04:14:28,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9035 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=26218, Invalid=45874, Unknown=0, NotChecked=0, Total=72092 [2022-02-24 04:14:28,856 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:28,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:14:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-24 04:14:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-02-24 04:14:28,871 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) [2022-02-24 04:14:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2022-02-24 04:14:28,872 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2022-02-24 04:14:28,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:28,872 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2022-02-24 04:14:28,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 134 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:14:28,872 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2022-02-24 04:14:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-24 04:14:28,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:28,873 INFO L514 BasicCegarLoop]: trace histogram [131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:14:28,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-24 04:14:28,873 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash 491586118, now seen corresponding path program 131 times [2022-02-24 04:14:28,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:28,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870713124] [2022-02-24 04:14:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:28,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:29,036 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:14:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:29,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:14:35,359 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:35,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870713124] [2022-02-24 04:14:35,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1870713124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:35,359 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:35,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-02-24 04:14:35,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577065640] [2022-02-24 04:14:35,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:35,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-02-24 04:14:35,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:35,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-02-24 04:14:35,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8786, Invalid=9846, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 04:14:35,362 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 137 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 135 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)