/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/heapsort.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:30:03,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:30:03,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:30:03,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:30:03,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:30:03,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:30:03,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:30:03,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:30:03,903 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:30:03,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:30:03,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:30:03,905 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:30:03,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:30:03,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:30:03,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:30:03,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:30:03,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:30:03,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:30:03,906 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:30:03,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:30:03,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:30:03,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:30:03,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:30:03,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:30:03,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:30:03,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:30:03,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:30:03,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:30:03,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:30:03,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:30:03,907 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:30:03,908 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:30:04,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:30:04,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:30:04,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:30:04,111 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:30:04,113 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:30:04,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/heapsort.i [2022-02-15 01:30:04,185 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54f1a1c1d/4a3679a87fdb495baaf4b249e5e574f7/FLAG611f5b951 [2022-02-15 01:30:04,532 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:30:04,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i [2022-02-15 01:30:04,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54f1a1c1d/4a3679a87fdb495baaf4b249e5e574f7/FLAG611f5b951 [2022-02-15 01:30:04,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54f1a1c1d/4a3679a87fdb495baaf4b249e5e574f7 [2022-02-15 01:30:04,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:30:04,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:30:04,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:30:04,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:30:04,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:30:04,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc1bab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04, skipping insertion in model container [2022-02-15 01:30:04,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:30:04,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:30:04,737 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-invgen/heapsort.i[893,906] [2022-02-15 01:30:04,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:30:04,766 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:30:04,774 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-invgen/heapsort.i[893,906] [2022-02-15 01:30:04,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:30:04,797 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:30:04,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04 WrapperNode [2022-02-15 01:30:04,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:30:04,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:30:04,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:30:04,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:30:04,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:30:04,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:30:04,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:30:04,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:30:04,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04" (1/1) ... [2022-02-15 01:30:04,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:30:04,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:30:04,880 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) [2022-02-15 01:30:04,899 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 [2022-02-15 01:30:04,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:30:04,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:30:04,950 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:30:04,950 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 01:30:04,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:30:04,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:30:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:30:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:30:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:30:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:30:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:30:04,994 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:30:04,995 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:30:05,142 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:30:05,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:30:05,146 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 01:30:05,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:30:05 BoogieIcfgContainer [2022-02-15 01:30:05,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:30:05,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:30:05,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:30:05,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:30:05,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:30:04" (1/3) ... [2022-02-15 01:30:05,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b75652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:30:05, skipping insertion in model container [2022-02-15 01:30:05,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:30:04" (2/3) ... [2022-02-15 01:30:05,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b75652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:30:05, skipping insertion in model container [2022-02-15 01:30:05,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:30:05" (3/3) ... [2022-02-15 01:30:05,162 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2022-02-15 01:30:05,165 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:30:05,165 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:30:05,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:30:05,207 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=JORDAN [2022-02-15 01:30:05,207 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:30:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 01:30:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 01:30:05,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:05,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:05,227 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:05,230 INFO L85 PathProgramCache]: Analyzing trace with hash -250128701, now seen corresponding path program 1 times [2022-02-15 01:30:05,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:05,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704069335] [2022-02-15 01:30:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:05,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:05,278 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:05,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:05,458 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:05,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704069335] [2022-02-15 01:30:05,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [704069335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:05,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:05,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:30:05,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758375122] [2022-02-15 01:30:05,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:05,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:30:05,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:30:05,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:30:05,483 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 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) [2022-02-15 01:30:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:05,726 INFO L93 Difference]: Finished difference Result 88 states and 148 transitions. [2022-02-15 01:30:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:30:05,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 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 [2022-02-15 01:30:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:05,733 INFO L225 Difference]: With dead ends: 88 [2022-02-15 01:30:05,733 INFO L226 Difference]: Without dead ends: 44 [2022-02-15 01:30:05,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:30:05,738 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:05,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 63 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-15 01:30:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-02-15 01:30:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-15 01:30:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-02-15 01:30:05,803 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 15 [2022-02-15 01:30:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:05,803 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-02-15 01:30:05,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 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) [2022-02-15 01:30:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-02-15 01:30:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 01:30:05,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:05,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:05,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:30:05,820 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:05,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:05,820 INFO L85 PathProgramCache]: Analyzing trace with hash -254865470, now seen corresponding path program 1 times [2022-02-15 01:30:05,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:05,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501391949] [2022-02-15 01:30:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:05,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:05,822 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:05,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:05,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:05,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501391949] [2022-02-15 01:30:05,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501391949] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:05,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:05,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:30:05,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952940397] [2022-02-15 01:30:05,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:05,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:30:05,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:05,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:30:05,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:30:05,913 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-02-15 01:30:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:06,154 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2022-02-15 01:30:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:30:06,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-02-15 01:30:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:06,164 INFO L225 Difference]: With dead ends: 71 [2022-02-15 01:30:06,164 INFO L226 Difference]: Without dead ends: 69 [2022-02-15 01:30:06,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:30:06,165 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:06,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-15 01:30:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2022-02-15 01:30:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-15 01:30:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-15 01:30:06,186 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 15 [2022-02-15 01:30:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:06,186 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-15 01:30:06,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-02-15 01:30:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-15 01:30:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 01:30:06,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:06,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:06,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:30:06,187 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash -216435080, now seen corresponding path program 1 times [2022-02-15 01:30:06,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:06,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827520563] [2022-02-15 01:30:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:06,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:06,198 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:06,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:06,304 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:06,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827520563] [2022-02-15 01:30:06,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [827520563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:06,304 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:06,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:30:06,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610218018] [2022-02-15 01:30:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:06,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:30:06,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:30:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:30:06,306 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:06,565 INFO L93 Difference]: Finished difference Result 80 states and 115 transitions. [2022-02-15 01:30:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:30:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-15 01:30:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:06,567 INFO L225 Difference]: With dead ends: 80 [2022-02-15 01:30:06,567 INFO L226 Difference]: Without dead ends: 78 [2022-02-15 01:30:06,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:30:06,569 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:06,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 65 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-15 01:30:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2022-02-15 01:30:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-15 01:30:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 98 transitions. [2022-02-15 01:30:06,603 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 98 transitions. Word has length 15 [2022-02-15 01:30:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:06,604 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 98 transitions. [2022-02-15 01:30:06,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:06,604 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 98 transitions. [2022-02-15 01:30:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 01:30:06,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:06,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:06,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:30:06,605 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash -228679181, now seen corresponding path program 1 times [2022-02-15 01:30:06,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:06,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516244705] [2022-02-15 01:30:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:06,607 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:06,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:06,651 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:06,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516244705] [2022-02-15 01:30:06,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516244705] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:06,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:06,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:30:06,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048484293] [2022-02-15 01:30:06,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:06,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:30:06,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:30:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:30:06,653 INFO L87 Difference]: Start difference. First operand 68 states and 98 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:06,875 INFO L93 Difference]: Finished difference Result 122 states and 183 transitions. [2022-02-15 01:30:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:30:06,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-15 01:30:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:06,877 INFO L225 Difference]: With dead ends: 122 [2022-02-15 01:30:06,877 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 01:30:06,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:30:06,878 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:06,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:06,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 01:30:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2022-02-15 01:30:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 38 states have call successors, (38), 7 states have call predecessors, (38), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-15 01:30:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 140 transitions. [2022-02-15 01:30:06,895 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 140 transitions. Word has length 15 [2022-02-15 01:30:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:06,896 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 140 transitions. [2022-02-15 01:30:06,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 140 transitions. [2022-02-15 01:30:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:30:06,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:06,897 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:06,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:30:06,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1266022048, now seen corresponding path program 1 times [2022-02-15 01:30:06,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:06,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484406942] [2022-02-15 01:30:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:06,899 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:06,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:06,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:06,944 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:06,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484406942] [2022-02-15 01:30:06,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484406942] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:06,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:06,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:30:06,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923930355] [2022-02-15 01:30:06,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:06,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:30:06,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:30:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:30:06,946 INFO L87 Difference]: Start difference. First operand 94 states and 140 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:30:07,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:07,068 INFO L93 Difference]: Finished difference Result 100 states and 145 transitions. [2022-02-15 01:30:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:30:07,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-15 01:30:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:07,070 INFO L225 Difference]: With dead ends: 100 [2022-02-15 01:30:07,070 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:30:07,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:30:07,071 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:07,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:30:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:30:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-02-15 01:30:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 38 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-15 01:30:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 143 transitions. [2022-02-15 01:30:07,087 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 143 transitions. Word has length 20 [2022-02-15 01:30:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:07,087 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 143 transitions. [2022-02-15 01:30:07,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:30:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 143 transitions. [2022-02-15 01:30:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:30:07,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:07,088 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:07,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:30:07,088 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash 884659585, now seen corresponding path program 1 times [2022-02-15 01:30:07,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:07,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867572672] [2022-02-15 01:30:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:07,090 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:07,157 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:07,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867572672] [2022-02-15 01:30:07,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867572672] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:07,157 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:07,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:30:07,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530808042] [2022-02-15 01:30:07,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:07,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:30:07,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:30:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:30:07,158 INFO L87 Difference]: Start difference. First operand 98 states and 143 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:30:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:07,379 INFO L93 Difference]: Finished difference Result 131 states and 194 transitions. [2022-02-15 01:30:07,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:30:07,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-15 01:30:07,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:07,382 INFO L225 Difference]: With dead ends: 131 [2022-02-15 01:30:07,382 INFO L226 Difference]: Without dead ends: 129 [2022-02-15 01:30:07,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:30:07,384 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:07,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:30:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-15 01:30:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2022-02-15 01:30:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 65 states have (on average 1.323076923076923) internal successors, (86), 66 states have internal predecessors, (86), 52 states have call successors, (52), 9 states have call predecessors, (52), 8 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-15 01:30:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 189 transitions. [2022-02-15 01:30:07,427 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 189 transitions. Word has length 20 [2022-02-15 01:30:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:07,428 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 189 transitions. [2022-02-15 01:30:07,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:30:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 189 transitions. [2022-02-15 01:30:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:30:07,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:07,432 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:07,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:30:07,432 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1424204299, now seen corresponding path program 1 times [2022-02-15 01:30:07,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:07,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106906227] [2022-02-15 01:30:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:07,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:07,435 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:07,504 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:07,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106906227] [2022-02-15 01:30:07,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [106906227] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:07,504 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:07,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:30:07,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619126] [2022-02-15 01:30:07,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:07,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:30:07,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:07,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:30:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:30:07,505 INFO L87 Difference]: Start difference. First operand 126 states and 189 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:30:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:07,699 INFO L93 Difference]: Finished difference Result 188 states and 291 transitions. [2022-02-15 01:30:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:30:07,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-15 01:30:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:07,703 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:30:07,703 INFO L226 Difference]: Without dead ends: 186 [2022-02-15 01:30:07,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:30:07,704 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:07,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 65 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:30:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-15 01:30:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2022-02-15 01:30:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 81 states have internal predecessors, (101), 76 states have call successors, (76), 10 states have call predecessors, (76), 9 states have return successors, (75), 70 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-15 01:30:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 252 transitions. [2022-02-15 01:30:07,745 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 252 transitions. Word has length 20 [2022-02-15 01:30:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:07,746 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 252 transitions. [2022-02-15 01:30:07,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:30:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 252 transitions. [2022-02-15 01:30:07,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:30:07,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:07,748 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:07,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:30:07,748 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash 297853571, now seen corresponding path program 1 times [2022-02-15 01:30:07,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:07,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365466197] [2022-02-15 01:30:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:07,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:07,751 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:07,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:07,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365466197] [2022-02-15 01:30:07,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [365466197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:07,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:07,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:30:07,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162170775] [2022-02-15 01:30:07,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:07,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:30:07,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:30:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:30:07,794 INFO L87 Difference]: Start difference. First operand 162 states and 252 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:30:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:07,905 INFO L93 Difference]: Finished difference Result 329 states and 524 transitions. [2022-02-15 01:30:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:30:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-15 01:30:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:07,908 INFO L225 Difference]: With dead ends: 329 [2022-02-15 01:30:07,908 INFO L226 Difference]: Without dead ends: 239 [2022-02-15 01:30:07,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:30:07,911 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:07,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:30:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-15 01:30:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 209. [2022-02-15 01:30:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 101 states have internal predecessors, (129), 104 states have call successors, (104), 10 states have call predecessors, (104), 9 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2022-02-15 01:30:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 336 transitions. [2022-02-15 01:30:07,954 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 336 transitions. Word has length 20 [2022-02-15 01:30:07,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:07,956 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 336 transitions. [2022-02-15 01:30:07,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:30:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 336 transitions. [2022-02-15 01:30:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 01:30:07,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:07,957 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:07,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:30:07,957 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:07,957 INFO L85 PathProgramCache]: Analyzing trace with hash 288094237, now seen corresponding path program 1 times [2022-02-15 01:30:07,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:07,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144591351] [2022-02-15 01:30:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:07,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:07,959 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:08,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:08,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:08,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:08,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144591351] [2022-02-15 01:30:08,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144591351] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:08,007 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:08,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:30:08,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813492900] [2022-02-15 01:30:08,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:08,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:30:08,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:08,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:30:08,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:30:08,008 INFO L87 Difference]: Start difference. First operand 209 states and 336 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 01:30:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:08,273 INFO L93 Difference]: Finished difference Result 275 states and 448 transitions. [2022-02-15 01:30:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:30:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-02-15 01:30:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:08,275 INFO L225 Difference]: With dead ends: 275 [2022-02-15 01:30:08,275 INFO L226 Difference]: Without dead ends: 273 [2022-02-15 01:30:08,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:30:08,276 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:08,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 61 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:08,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-02-15 01:30:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 249. [2022-02-15 01:30:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 114 states have (on average 1.3859649122807018) internal successors, (158), 124 states have internal predecessors, (158), 124 states have call successors, (124), 11 states have call predecessors, (124), 10 states have return successors, (123), 113 states have call predecessors, (123), 123 states have call successors, (123) [2022-02-15 01:30:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 405 transitions. [2022-02-15 01:30:08,312 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 405 transitions. Word has length 27 [2022-02-15 01:30:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:08,312 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 405 transitions. [2022-02-15 01:30:08,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 01:30:08,313 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 405 transitions. [2022-02-15 01:30:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:30:08,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:08,313 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:08,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:30:08,313 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash -870562259, now seen corresponding path program 1 times [2022-02-15 01:30:08,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:08,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919342783] [2022-02-15 01:30:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:08,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:08,440 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:30:08,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:08,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:08,540 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:08,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919342783] [2022-02-15 01:30:08,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1919342783] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:08,540 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:08,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:30:08,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285373482] [2022-02-15 01:30:08,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:08,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:30:08,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:08,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:30:08,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:30:08,541 INFO L87 Difference]: Start difference. First operand 249 states and 405 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 01:30:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:08,933 INFO L93 Difference]: Finished difference Result 481 states and 764 transitions. [2022-02-15 01:30:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:30:08,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-02-15 01:30:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:08,941 INFO L225 Difference]: With dead ends: 481 [2022-02-15 01:30:08,942 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 01:30:08,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:30:08,943 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 89 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:08,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 67 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:30:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 01:30:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 263. [2022-02-15 01:30:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 124 states have (on average 1.3548387096774193) internal successors, (168), 135 states have internal predecessors, (168), 125 states have call successors, (125), 14 states have call predecessors, (125), 13 states have return successors, (124), 113 states have call predecessors, (124), 124 states have call successors, (124) [2022-02-15 01:30:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 417 transitions. [2022-02-15 01:30:09,003 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 417 transitions. Word has length 29 [2022-02-15 01:30:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:09,003 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 417 transitions. [2022-02-15 01:30:09,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 01:30:09,004 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 417 transitions. [2022-02-15 01:30:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:30:09,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:09,008 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:09,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:30:09,009 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:09,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:09,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1319777776, now seen corresponding path program 1 times [2022-02-15 01:30:09,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:09,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340093256] [2022-02-15 01:30:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:09,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:09,011 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 01:30:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 01:30:09,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:09,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340093256] [2022-02-15 01:30:09,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [340093256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:09,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:09,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:30:09,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864136971] [2022-02-15 01:30:09,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:09,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:30:09,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:30:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:30:09,074 INFO L87 Difference]: Start difference. First operand 263 states and 417 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 01:30:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:09,306 INFO L93 Difference]: Finished difference Result 339 states and 537 transitions. [2022-02-15 01:30:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:30:09,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-15 01:30:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:09,309 INFO L225 Difference]: With dead ends: 339 [2022-02-15 01:30:09,309 INFO L226 Difference]: Without dead ends: 337 [2022-02-15 01:30:09,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:30:09,309 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:09,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 75 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:09,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-02-15 01:30:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 313. [2022-02-15 01:30:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 142 states have (on average 1.352112676056338) internal successors, (192), 159 states have internal predecessors, (192), 155 states have call successors, (155), 16 states have call predecessors, (155), 15 states have return successors, (154), 137 states have call predecessors, (154), 154 states have call successors, (154) [2022-02-15 01:30:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 501 transitions. [2022-02-15 01:30:09,356 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 501 transitions. Word has length 30 [2022-02-15 01:30:09,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:09,357 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 501 transitions. [2022-02-15 01:30:09,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 01:30:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 501 transitions. [2022-02-15 01:30:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:30:09,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:09,357 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:09,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:30:09,358 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:09,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:09,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1828949766, now seen corresponding path program 1 times [2022-02-15 01:30:09,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:09,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370955883] [2022-02-15 01:30:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:09,359 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-15 01:30:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:09,406 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:09,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370955883] [2022-02-15 01:30:09,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370955883] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:09,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:09,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:30:09,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225961224] [2022-02-15 01:30:09,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:09,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:30:09,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:09,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:30:09,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:30:09,407 INFO L87 Difference]: Start difference. First operand 313 states and 501 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 01:30:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:09,788 INFO L93 Difference]: Finished difference Result 484 states and 802 transitions. [2022-02-15 01:30:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:30:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-02-15 01:30:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:09,791 INFO L225 Difference]: With dead ends: 484 [2022-02-15 01:30:09,791 INFO L226 Difference]: Without dead ends: 482 [2022-02-15 01:30:09,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:30:09,792 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:09,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 76 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-02-15 01:30:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 436. [2022-02-15 01:30:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 189 states have (on average 1.3915343915343916) internal successors, (263), 217 states have internal predecessors, (263), 230 states have call successors, (230), 17 states have call predecessors, (230), 16 states have return successors, (229), 201 states have call predecessors, (229), 229 states have call successors, (229) [2022-02-15 01:30:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 722 transitions. [2022-02-15 01:30:09,857 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 722 transitions. Word has length 32 [2022-02-15 01:30:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:09,857 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 722 transitions. [2022-02-15 01:30:09,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 01:30:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 722 transitions. [2022-02-15 01:30:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:30:09,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:09,858 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:09,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:30:09,858 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1969498376, now seen corresponding path program 1 times [2022-02-15 01:30:09,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:09,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828824828] [2022-02-15 01:30:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:09,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:09,859 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-15 01:30:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:09,918 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:09,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828824828] [2022-02-15 01:30:09,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [828824828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:09,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:09,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:30:09,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716361937] [2022-02-15 01:30:09,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:09,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:30:09,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:30:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:30:09,919 INFO L87 Difference]: Start difference. First operand 436 states and 722 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 01:30:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:10,206 INFO L93 Difference]: Finished difference Result 503 states and 831 transitions. [2022-02-15 01:30:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:30:10,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-02-15 01:30:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:10,210 INFO L225 Difference]: With dead ends: 503 [2022-02-15 01:30:10,210 INFO L226 Difference]: Without dead ends: 501 [2022-02-15 01:30:10,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:30:10,210 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 109 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:10,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 66 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-02-15 01:30:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 443. [2022-02-15 01:30:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 192 states have (on average 1.3854166666666667) internal successors, (266), 220 states have internal predecessors, (266), 233 states have call successors, (233), 18 states have call predecessors, (233), 17 states have return successors, (232), 204 states have call predecessors, (232), 232 states have call successors, (232) [2022-02-15 01:30:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 731 transitions. [2022-02-15 01:30:10,278 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 731 transitions. Word has length 32 [2022-02-15 01:30:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:10,278 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 731 transitions. [2022-02-15 01:30:10,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 01:30:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 731 transitions. [2022-02-15 01:30:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:30:10,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:10,279 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:10,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:30:10,279 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash 154781133, now seen corresponding path program 1 times [2022-02-15 01:30:10,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:10,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657475693] [2022-02-15 01:30:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:10,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:10,281 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:10,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:10,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:10,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:10,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 01:30:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:10,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-15 01:30:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:10,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-15 01:30:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-15 01:30:10,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:10,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657475693] [2022-02-15 01:30:10,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [657475693] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:10,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:10,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:30:10,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965715156] [2022-02-15 01:30:10,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:10,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:30:10,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:30:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:30:10,338 INFO L87 Difference]: Start difference. First operand 443 states and 731 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-15 01:30:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:10,632 INFO L93 Difference]: Finished difference Result 500 states and 809 transitions. [2022-02-15 01:30:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:30:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-02-15 01:30:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:10,635 INFO L225 Difference]: With dead ends: 500 [2022-02-15 01:30:10,635 INFO L226 Difference]: Without dead ends: 498 [2022-02-15 01:30:10,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:30:10,636 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:10,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 77 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-15 01:30:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 447. [2022-02-15 01:30:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 195 states have (on average 1.3794871794871795) internal successors, (269), 223 states have internal predecessors, (269), 233 states have call successors, (233), 19 states have call predecessors, (233), 18 states have return successors, (232), 204 states have call predecessors, (232), 232 states have call successors, (232) [2022-02-15 01:30:10,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 734 transitions. [2022-02-15 01:30:10,703 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 734 transitions. Word has length 42 [2022-02-15 01:30:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:10,703 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 734 transitions. [2022-02-15 01:30:10,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-15 01:30:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 734 transitions. [2022-02-15 01:30:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:30:10,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:10,704 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:10,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:30:10,704 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash -756625364, now seen corresponding path program 1 times [2022-02-15 01:30:10,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:10,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954769806] [2022-02-15 01:30:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:10,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:10,850 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:30:10,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:10,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:11,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:11,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954769806] [2022-02-15 01:30:11,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954769806] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:11,308 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:11,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:30:11,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695243606] [2022-02-15 01:30:11,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:11,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:30:11,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:30:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:30:11,309 INFO L87 Difference]: Start difference. First operand 447 states and 734 transitions. Second operand has 23 states, 20 states have (on average 1.35) internal successors, (27), 16 states have internal predecessors, (27), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:30:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:12,151 INFO L93 Difference]: Finished difference Result 621 states and 979 transitions. [2022-02-15 01:30:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:30:12,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 16 states have internal predecessors, (27), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2022-02-15 01:30:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:12,154 INFO L225 Difference]: With dead ends: 621 [2022-02-15 01:30:12,155 INFO L226 Difference]: Without dead ends: 619 [2022-02-15 01:30:12,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=2170, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:30:12,157 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 151 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:12,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 111 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 892 Invalid, 0 Unknown, 268 Unchecked, 0.4s Time] [2022-02-15 01:30:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-15 01:30:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 561. [2022-02-15 01:30:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 252 states have (on average 1.3333333333333333) internal successors, (336), 286 states have internal predecessors, (336), 278 states have call successors, (278), 31 states have call predecessors, (278), 30 states have return successors, (277), 243 states have call predecessors, (277), 277 states have call successors, (277) [2022-02-15 01:30:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 891 transitions. [2022-02-15 01:30:12,271 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 891 transitions. Word has length 42 [2022-02-15 01:30:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:12,271 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 891 transitions. [2022-02-15 01:30:12,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 16 states have internal predecessors, (27), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:30:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 891 transitions. [2022-02-15 01:30:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:30:12,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:12,273 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:12,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:30:12,273 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash 202086614, now seen corresponding path program 1 times [2022-02-15 01:30:12,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:12,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027381987] [2022-02-15 01:30:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:12,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:12,433 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:30:12,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:12,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:12,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:30:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:12,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 01:30:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:12,831 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:12,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027381987] [2022-02-15 01:30:12,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027381987] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:12,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:12,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:30:12,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446398242] [2022-02-15 01:30:12,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:12,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:30:12,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:30:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:30:12,832 INFO L87 Difference]: Start difference. First operand 561 states and 891 transitions. Second operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-15 01:30:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:14,628 INFO L93 Difference]: Finished difference Result 1087 states and 1761 transitions. [2022-02-15 01:30:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:30:14,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.6) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2022-02-15 01:30:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:14,634 INFO L225 Difference]: With dead ends: 1087 [2022-02-15 01:30:14,634 INFO L226 Difference]: Without dead ends: 1085 [2022-02-15 01:30:14,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=4260, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:30:14,635 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 278 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:14,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 137 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 1961 Invalid, 0 Unknown, 356 Unchecked, 1.0s Time] [2022-02-15 01:30:14,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-02-15 01:30:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 843. [2022-02-15 01:30:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 381 states have (on average 1.3648293963254594) internal successors, (520), 429 states have internal predecessors, (520), 424 states have call successors, (424), 39 states have call predecessors, (424), 37 states have return successors, (423), 374 states have call predecessors, (423), 423 states have call successors, (423) [2022-02-15 01:30:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1367 transitions. [2022-02-15 01:30:14,799 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1367 transitions. Word has length 54 [2022-02-15 01:30:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:14,800 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1367 transitions. [2022-02-15 01:30:14,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.6) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-15 01:30:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1367 transitions. [2022-02-15 01:30:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:30:14,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:14,801 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:14,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:30:14,801 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:14,802 INFO L85 PathProgramCache]: Analyzing trace with hash -667500302, now seen corresponding path program 1 times [2022-02-15 01:30:14,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:14,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43775592] [2022-02-15 01:30:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:14,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:14,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-02-15 01:30:14,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:14,806 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-15 01:30:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-15 01:30:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-15 01:30:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 01:30:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:30:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:30:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 01:30:14,859 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:14,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43775592] [2022-02-15 01:30:14,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [43775592] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:14,859 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:14,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:30:14,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826451890] [2022-02-15 01:30:14,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:14,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:30:14,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:30:14,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:30:14,860 INFO L87 Difference]: Start difference. First operand 843 states and 1367 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 01:30:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:15,328 INFO L93 Difference]: Finished difference Result 886 states and 1430 transitions. [2022-02-15 01:30:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:30:15,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-02-15 01:30:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:15,333 INFO L225 Difference]: With dead ends: 886 [2022-02-15 01:30:15,333 INFO L226 Difference]: Without dead ends: 884 [2022-02-15 01:30:15,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:30:15,334 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:15,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 77 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:30:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-02-15 01:30:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 819. [2022-02-15 01:30:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 370 states have (on average 1.354054054054054) internal successors, (501), 418 states have internal predecessors, (501), 410 states have call successors, (410), 40 states have call predecessors, (410), 38 states have return successors, (409), 360 states have call predecessors, (409), 409 states have call successors, (409) [2022-02-15 01:30:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1320 transitions. [2022-02-15 01:30:15,498 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1320 transitions. Word has length 62 [2022-02-15 01:30:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:15,498 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1320 transitions. [2022-02-15 01:30:15,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 01:30:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1320 transitions. [2022-02-15 01:30:15,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 01:30:15,499 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:15,499 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:15,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:30:15,499 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash 820904785, now seen corresponding path program 2 times [2022-02-15 01:30:15,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:15,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389165463] [2022-02-15 01:30:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:15,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:15,504 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-02-15 01:30:15,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:15,505 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-15 01:30:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-15 01:30:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-15 01:30:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 01:30:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:30:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:30:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-15 01:30:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 01:30:15,565 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:15,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389165463] [2022-02-15 01:30:15,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389165463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:15,565 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:15,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:30:15,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197672517] [2022-02-15 01:30:15,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:15,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:30:15,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:15,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:30:15,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:30:15,566 INFO L87 Difference]: Start difference. First operand 819 states and 1320 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-15 01:30:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:16,126 INFO L93 Difference]: Finished difference Result 1133 states and 1839 transitions. [2022-02-15 01:30:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:30:16,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2022-02-15 01:30:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:16,132 INFO L225 Difference]: With dead ends: 1133 [2022-02-15 01:30:16,132 INFO L226 Difference]: Without dead ends: 1131 [2022-02-15 01:30:16,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:30:16,133 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:16,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 95 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:30:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-02-15 01:30:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1039. [2022-02-15 01:30:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 464 states have (on average 1.3599137931034482) internal successors, (631), 525 states have internal predecessors, (631), 527 states have call successors, (527), 49 states have call predecessors, (527), 47 states have return successors, (526), 464 states have call predecessors, (526), 526 states have call successors, (526) [2022-02-15 01:30:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1684 transitions. [2022-02-15 01:30:16,315 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1684 transitions. Word has length 67 [2022-02-15 01:30:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:16,316 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1684 transitions. [2022-02-15 01:30:16,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-15 01:30:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1684 transitions. [2022-02-15 01:30:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 01:30:16,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:16,317 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:16,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:30:16,317 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1022728719, now seen corresponding path program 1 times [2022-02-15 01:30:16,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:16,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267584654] [2022-02-15 01:30:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:16,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:16,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-02-15 01:30:16,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:16,323 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-15 01:30:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-15 01:30:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-15 01:30:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 01:30:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:30:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:30:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-15 01:30:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 01:30:16,363 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:16,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267584654] [2022-02-15 01:30:16,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [267584654] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:16,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:16,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:30:16,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734331218] [2022-02-15 01:30:16,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:16,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:30:16,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:30:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:30:16,364 INFO L87 Difference]: Start difference. First operand 1039 states and 1684 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 01:30:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:16,564 INFO L93 Difference]: Finished difference Result 1098 states and 1729 transitions. [2022-02-15 01:30:16,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:30:16,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-02-15 01:30:16,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:16,570 INFO L225 Difference]: With dead ends: 1098 [2022-02-15 01:30:16,570 INFO L226 Difference]: Without dead ends: 891 [2022-02-15 01:30:16,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:30:16,571 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:16,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 54 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:30:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-02-15 01:30:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 891. [2022-02-15 01:30:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 395 states have (on average 1.369620253164557) internal successors, (541), 446 states have internal predecessors, (541), 457 states have call successors, (457), 40 states have call predecessors, (457), 38 states have return successors, (456), 404 states have call predecessors, (456), 456 states have call successors, (456) [2022-02-15 01:30:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1454 transitions. [2022-02-15 01:30:16,728 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1454 transitions. Word has length 67 [2022-02-15 01:30:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:16,728 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1454 transitions. [2022-02-15 01:30:16,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 01:30:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1454 transitions. [2022-02-15 01:30:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:30:16,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:16,733 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:16,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:30:16,734 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1143810957, now seen corresponding path program 1 times [2022-02-15 01:30:16,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:16,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467182210] [2022-02-15 01:30:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:16,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:16,983 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:16,983 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:30:16,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:17,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:17,814 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:17,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467182210] [2022-02-15 01:30:17,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467182210] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:17,815 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:17,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:30:17,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588968072] [2022-02-15 01:30:17,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:17,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:30:17,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:30:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:30:17,816 INFO L87 Difference]: Start difference. First operand 891 states and 1454 transitions. Second operand has 38 states, 32 states have (on average 1.28125) internal successors, (41), 26 states have internal predecessors, (41), 9 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 01:30:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:18,843 INFO L93 Difference]: Finished difference Result 971 states and 1565 transitions. [2022-02-15 01:30:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:30:18,843 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.28125) internal successors, (41), 26 states have internal predecessors, (41), 9 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-02-15 01:30:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:18,848 INFO L225 Difference]: With dead ends: 971 [2022-02-15 01:30:18,848 INFO L226 Difference]: Without dead ends: 969 [2022-02-15 01:30:18,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 16 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=745, Invalid=5107, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:30:18,850 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 164 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:18,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 244 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 841 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-02-15 01:30:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-02-15 01:30:18,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 924. [2022-02-15 01:30:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 417 states have (on average 1.369304556354916) internal successors, (571), 470 states have internal predecessors, (571), 465 states have call successors, (465), 43 states have call predecessors, (465), 41 states have return successors, (464), 410 states have call predecessors, (464), 464 states have call successors, (464) [2022-02-15 01:30:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1500 transitions. [2022-02-15 01:30:18,998 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1500 transitions. Word has length 69 [2022-02-15 01:30:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:18,998 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1500 transitions. [2022-02-15 01:30:18,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.28125) internal successors, (41), 26 states have internal predecessors, (41), 9 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 01:30:18,998 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1500 transitions. [2022-02-15 01:30:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 01:30:18,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:18,999 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:18,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:30:18,999 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:19,000 INFO L85 PathProgramCache]: Analyzing trace with hash 152819220, now seen corresponding path program 1 times [2022-02-15 01:30:19,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:19,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297806615] [2022-02-15 01:30:19,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:19,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:19,118 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:30:19,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:19,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:19,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:30:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:19,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 01:30:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:19,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 01:30:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:19,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 01:30:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:19,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 01:30:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:19,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 01:30:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-15 01:30:19,582 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:19,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297806615] [2022-02-15 01:30:19,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [297806615] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:19,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:19,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:30:19,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083018733] [2022-02-15 01:30:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:19,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:30:19,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:30:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:30:19,583 INFO L87 Difference]: Start difference. First operand 924 states and 1500 transitions. Second operand has 24 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-02-15 01:30:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:20,441 INFO L93 Difference]: Finished difference Result 1003 states and 1590 transitions. [2022-02-15 01:30:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:30:20,441 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 76 [2022-02-15 01:30:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:20,448 INFO L225 Difference]: With dead ends: 1003 [2022-02-15 01:30:20,448 INFO L226 Difference]: Without dead ends: 1001 [2022-02-15 01:30:20,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:30:20,449 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 177 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:20,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 108 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1017 Invalid, 0 Unknown, 194 Unchecked, 0.4s Time] [2022-02-15 01:30:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-02-15 01:30:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 945. [2022-02-15 01:30:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 436 states have (on average 1.3509174311926606) internal successors, (589), 488 states have internal predecessors, (589), 460 states have call successors, (460), 50 states have call predecessors, (460), 48 states have return successors, (459), 406 states have call predecessors, (459), 459 states have call successors, (459) [2022-02-15 01:30:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1508 transitions. [2022-02-15 01:30:20,604 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1508 transitions. Word has length 76 [2022-02-15 01:30:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:20,604 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1508 transitions. [2022-02-15 01:30:20,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-02-15 01:30:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1508 transitions. [2022-02-15 01:30:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 01:30:20,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:20,607 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:20,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:30:20,607 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1636642221, now seen corresponding path program 1 times [2022-02-15 01:30:20,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:20,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974537189] [2022-02-15 01:30:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:20,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:20,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:20,947 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:30:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:20,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:21,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-15 01:30:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:21,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 01:30:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:21,810 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:21,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974537189] [2022-02-15 01:30:21,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [974537189] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:21,810 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:21,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:30:21,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451847256] [2022-02-15 01:30:21,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:21,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:30:21,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:30:21,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:30:21,812 INFO L87 Difference]: Start difference. First operand 945 states and 1508 transitions. Second operand has 38 states, 32 states have (on average 1.375) internal successors, (44), 26 states have internal predecessors, (44), 9 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-15 01:30:22,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:22,879 INFO L93 Difference]: Finished difference Result 1000 states and 1587 transitions. [2022-02-15 01:30:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 01:30:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.375) internal successors, (44), 26 states have internal predecessors, (44), 9 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 79 [2022-02-15 01:30:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:22,885 INFO L225 Difference]: With dead ends: 1000 [2022-02-15 01:30:22,885 INFO L226 Difference]: Without dead ends: 998 [2022-02-15 01:30:22,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 29 SyntacticMatches, 16 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=786, Invalid=5534, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:30:22,888 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 164 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:22,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 217 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 782 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-02-15 01:30:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-02-15 01:30:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 958. [2022-02-15 01:30:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 442 states have (on average 1.3461538461538463) internal successors, (595), 495 states have internal predecessors, (595), 465 states have call successors, (465), 52 states have call predecessors, (465), 50 states have return successors, (464), 410 states have call predecessors, (464), 464 states have call successors, (464) [2022-02-15 01:30:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1524 transitions. [2022-02-15 01:30:23,048 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1524 transitions. Word has length 79 [2022-02-15 01:30:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:23,048 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1524 transitions. [2022-02-15 01:30:23,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.375) internal successors, (44), 26 states have internal predecessors, (44), 9 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-15 01:30:23,049 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1524 transitions. [2022-02-15 01:30:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:30:23,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:23,050 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:23,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:30:23,050 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:23,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:23,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1924470375, now seen corresponding path program 1 times [2022-02-15 01:30:23,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:23,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003908016] [2022-02-15 01:30:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:23,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:23,265 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 01:30:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 01:30:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 01:30:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 01:30:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 01:30:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 01:30:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 01:30:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-15 01:30:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:23,345 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:23,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003908016] [2022-02-15 01:30:23,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2003908016] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:23,345 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:23,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:30:23,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447638379] [2022-02-15 01:30:23,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:23,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:30:23,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:23,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:30:23,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:30:23,346 INFO L87 Difference]: Start difference. First operand 958 states and 1524 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-15 01:30:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:23,938 INFO L93 Difference]: Finished difference Result 1625 states and 2620 transitions. [2022-02-15 01:30:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:30:23,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 83 [2022-02-15 01:30:23,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:23,944 INFO L225 Difference]: With dead ends: 1625 [2022-02-15 01:30:23,944 INFO L226 Difference]: Without dead ends: 1302 [2022-02-15 01:30:23,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:30:23,945 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:23,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 79 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:30:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-02-15 01:30:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 910. [2022-02-15 01:30:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 422 states have (on average 1.3436018957345972) internal successors, (567), 471 states have internal predecessors, (567), 439 states have call successors, (439), 50 states have call predecessors, (439), 48 states have return successors, (438), 388 states have call predecessors, (438), 438 states have call successors, (438) [2022-02-15 01:30:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1444 transitions. [2022-02-15 01:30:24,099 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1444 transitions. Word has length 83 [2022-02-15 01:30:24,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:24,100 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 1444 transitions. [2022-02-15 01:30:24,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-15 01:30:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1444 transitions. [2022-02-15 01:30:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:30:24,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:24,101 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:24,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:30:24,101 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash 557910969, now seen corresponding path program 2 times [2022-02-15 01:30:24,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:24,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796056842] [2022-02-15 01:30:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:24,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:24,374 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 01:30:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 01:30:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 01:30:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 01:30:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 01:30:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 01:30:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 01:30:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-02-15 01:30:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 01:30:24,444 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:24,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796056842] [2022-02-15 01:30:24,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1796056842] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:24,444 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:24,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:30:24,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405942851] [2022-02-15 01:30:24,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:24,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:30:24,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:24,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:30:24,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:30:24,447 INFO L87 Difference]: Start difference. First operand 910 states and 1444 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-15 01:30:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:24,697 INFO L93 Difference]: Finished difference Result 918 states and 1451 transitions. [2022-02-15 01:30:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:30:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 83 [2022-02-15 01:30:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:24,702 INFO L225 Difference]: With dead ends: 918 [2022-02-15 01:30:24,702 INFO L226 Difference]: Without dead ends: 916 [2022-02-15 01:30:24,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:30:24,702 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:24,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 57 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:30:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-02-15 01:30:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 745. [2022-02-15 01:30:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 360 states have (on average 1.3083333333333333) internal successors, (471), 398 states have internal predecessors, (471), 335 states have call successors, (335), 51 states have call predecessors, (335), 49 states have return successors, (334), 295 states have call predecessors, (334), 334 states have call successors, (334) [2022-02-15 01:30:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1140 transitions. [2022-02-15 01:30:24,839 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1140 transitions. Word has length 83 [2022-02-15 01:30:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:24,841 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1140 transitions. [2022-02-15 01:30:24,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-15 01:30:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1140 transitions. [2022-02-15 01:30:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:30:24,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:24,843 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:24,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:30:24,843 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -578278577, now seen corresponding path program 1 times [2022-02-15 01:30:24,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:24,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912452626] [2022-02-15 01:30:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:24,867 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:24,867 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-02-15 01:30:24,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:24,868 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 01:30:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 01:30:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-15 01:30:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-15 01:30:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 01:30:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 01:30:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 01:30:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-15 01:30:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 01:30:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-15 01:30:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-15 01:30:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-15 01:30:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-15 01:30:24,961 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:24,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912452626] [2022-02-15 01:30:24,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1912452626] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:24,961 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:24,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:30:24,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120424006] [2022-02-15 01:30:24,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:24,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:30:24,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:30:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:30:24,962 INFO L87 Difference]: Start difference. First operand 745 states and 1140 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-02-15 01:30:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:25,321 INFO L93 Difference]: Finished difference Result 767 states and 1169 transitions. [2022-02-15 01:30:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:30:25,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2022-02-15 01:30:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:25,325 INFO L225 Difference]: With dead ends: 767 [2022-02-15 01:30:25,325 INFO L226 Difference]: Without dead ends: 625 [2022-02-15 01:30:25,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:30:25,326 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 66 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:25,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 64 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:30:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-02-15 01:30:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 468. [2022-02-15 01:30:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 242 states have (on average 1.2479338842975207) internal successors, (302), 259 states have internal predecessors, (302), 184 states have call successors, (184), 43 states have call predecessors, (184), 41 states have return successors, (183), 165 states have call predecessors, (183), 183 states have call successors, (183) [2022-02-15 01:30:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 669 transitions. [2022-02-15 01:30:25,421 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 669 transitions. Word has length 89 [2022-02-15 01:30:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:25,421 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 669 transitions. [2022-02-15 01:30:25,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-02-15 01:30:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 669 transitions. [2022-02-15 01:30:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:30:25,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:25,435 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:25,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:30:25,436 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:25,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1038278041, now seen corresponding path program 1 times [2022-02-15 01:30:25,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:25,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519897009] [2022-02-15 01:30:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:25,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:25,608 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:30:25,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:30:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 01:30:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 01:30:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 01:30:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 01:30:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 01:30:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-15 01:30:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 01:30:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 01:30:26,040 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:26,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519897009] [2022-02-15 01:30:26,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [519897009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:26,041 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:26,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:30:26,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454688048] [2022-02-15 01:30:26,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:26,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:30:26,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:30:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:30:26,042 INFO L87 Difference]: Start difference. First operand 468 states and 669 transitions. Second operand has 25 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-02-15 01:30:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:27,642 INFO L93 Difference]: Finished difference Result 813 states and 1170 transitions. [2022-02-15 01:30:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 01:30:27,642 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 89 [2022-02-15 01:30:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:27,645 INFO L225 Difference]: With dead ends: 813 [2022-02-15 01:30:27,645 INFO L226 Difference]: Without dead ends: 611 [2022-02-15 01:30:27,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=690, Invalid=4712, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:30:27,648 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 295 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:27,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 147 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 1733 Invalid, 0 Unknown, 281 Unchecked, 0.9s Time] [2022-02-15 01:30:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-15 01:30:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 477. [2022-02-15 01:30:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 255 states have (on average 1.2470588235294118) internal successors, (318), 271 states have internal predecessors, (318), 178 states have call successors, (178), 45 states have call predecessors, (178), 43 states have return successors, (177), 160 states have call predecessors, (177), 177 states have call successors, (177) [2022-02-15 01:30:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 673 transitions. [2022-02-15 01:30:27,776 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 673 transitions. Word has length 89 [2022-02-15 01:30:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:27,776 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 673 transitions. [2022-02-15 01:30:27,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-02-15 01:30:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 673 transitions. [2022-02-15 01:30:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-15 01:30:27,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:27,778 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:27,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:30:27,778 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:27,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash -560912485, now seen corresponding path program 1 times [2022-02-15 01:30:27,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:27,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449328104] [2022-02-15 01:30:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:27,943 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:27,943 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:30:27,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:27,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:27,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:30:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 01:30:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 01:30:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 01:30:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 01:30:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 01:30:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:30:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:30:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 01:30:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-15 01:30:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 01:30:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-15 01:30:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-15 01:30:28,392 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:28,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449328104] [2022-02-15 01:30:28,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [449328104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:28,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:28,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:30:28,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256683244] [2022-02-15 01:30:28,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:28,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:30:28,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:28,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:30:28,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:30:28,393 INFO L87 Difference]: Start difference. First operand 477 states and 673 transitions. Second operand has 25 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-02-15 01:30:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:29,791 INFO L93 Difference]: Finished difference Result 703 states and 1019 transitions. [2022-02-15 01:30:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 01:30:29,792 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 111 [2022-02-15 01:30:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:29,800 INFO L225 Difference]: With dead ends: 703 [2022-02-15 01:30:29,800 INFO L226 Difference]: Without dead ends: 701 [2022-02-15 01:30:29,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=647, Invalid=4045, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:30:29,802 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 202 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:29,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 135 Invalid, 2715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 1792 Invalid, 0 Unknown, 466 Unchecked, 0.7s Time] [2022-02-15 01:30:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-02-15 01:30:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 502. [2022-02-15 01:30:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 263 states have (on average 1.2395437262357414) internal successors, (326), 282 states have internal predecessors, (326), 193 states have call successors, (193), 46 states have call predecessors, (193), 45 states have return successors, (192), 173 states have call predecessors, (192), 192 states have call successors, (192) [2022-02-15 01:30:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 711 transitions. [2022-02-15 01:30:29,931 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 711 transitions. Word has length 111 [2022-02-15 01:30:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:29,931 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 711 transitions. [2022-02-15 01:30:29,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 7 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-02-15 01:30:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 711 transitions. [2022-02-15 01:30:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-15 01:30:29,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:29,933 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:29,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:30:29,934 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1794256103, now seen corresponding path program 2 times [2022-02-15 01:30:29,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:29,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116475062] [2022-02-15 01:30:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:30,097 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:30,097 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:30:30,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:30:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 01:30:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 01:30:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 01:30:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 01:30:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 01:30:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:30:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:30:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 01:30:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-15 01:30:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 01:30:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-15 01:30:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-15 01:30:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-15 01:30:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-15 01:30:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-15 01:30:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-15 01:30:30,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:30,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116475062] [2022-02-15 01:30:30,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116475062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:30,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:30,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:30:30,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139919956] [2022-02-15 01:30:30,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:30,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:30:30,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:30:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:30:30,734 INFO L87 Difference]: Start difference. First operand 502 states and 711 transitions. Second operand has 26 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-15 01:30:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:31,621 INFO L93 Difference]: Finished difference Result 605 states and 844 transitions. [2022-02-15 01:30:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:30:31,622 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 133 [2022-02-15 01:30:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:31,624 INFO L225 Difference]: With dead ends: 605 [2022-02-15 01:30:31,624 INFO L226 Difference]: Without dead ends: 603 [2022-02-15 01:30:31,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=410, Invalid=3012, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:30:31,625 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 68 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:31,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 151 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 892 Invalid, 0 Unknown, 382 Unchecked, 0.4s Time] [2022-02-15 01:30:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-15 01:30:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 562. [2022-02-15 01:30:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 298 states have (on average 1.2315436241610738) internal successors, (367), 319 states have internal predecessors, (367), 210 states have call successors, (210), 54 states have call predecessors, (210), 53 states have return successors, (209), 188 states have call predecessors, (209), 209 states have call successors, (209) [2022-02-15 01:30:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 786 transitions. [2022-02-15 01:30:31,751 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 786 transitions. Word has length 133 [2022-02-15 01:30:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:31,751 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 786 transitions. [2022-02-15 01:30:31,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-15 01:30:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 786 transitions. [2022-02-15 01:30:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-15 01:30:31,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:31,753 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:31,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:30:31,753 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:31,753 INFO L85 PathProgramCache]: Analyzing trace with hash -907033257, now seen corresponding path program 1 times [2022-02-15 01:30:31,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:31,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205017992] [2022-02-15 01:30:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:31,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:31,912 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:30:31,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:31,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:31,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 01:30:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:31,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 01:30:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:31,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 01:30:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:31,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 01:30:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:31,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 01:30:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 01:30:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:30:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:30:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 01:30:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-15 01:30:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 01:30:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-15 01:30:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-15 01:30:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-02-15 01:30:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-02-15 01:30:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-15 01:30:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-02-15 01:30:32,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:32,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205017992] [2022-02-15 01:30:32,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205017992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:32,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:32,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:30:32,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227359637] [2022-02-15 01:30:32,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:32,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:30:32,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:32,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:30:32,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:30:32,438 INFO L87 Difference]: Start difference. First operand 562 states and 786 transitions. Second operand has 25 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-15 01:30:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:33,467 INFO L93 Difference]: Finished difference Result 811 states and 1145 transitions. [2022-02-15 01:30:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:30:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 133 [2022-02-15 01:30:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:33,472 INFO L225 Difference]: With dead ends: 811 [2022-02-15 01:30:33,472 INFO L226 Difference]: Without dead ends: 809 [2022-02-15 01:30:33,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=429, Invalid=2763, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:30:33,473 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 167 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:33,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 139 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1264 Invalid, 0 Unknown, 182 Unchecked, 0.5s Time] [2022-02-15 01:30:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-15 01:30:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 726. [2022-02-15 01:30:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 382 states have (on average 1.2329842931937174) internal successors, (471), 411 states have internal predecessors, (471), 276 states have call successors, (276), 68 states have call predecessors, (276), 67 states have return successors, (275), 246 states have call predecessors, (275), 275 states have call successors, (275) [2022-02-15 01:30:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1022 transitions. [2022-02-15 01:30:33,634 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1022 transitions. Word has length 133 [2022-02-15 01:30:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:33,635 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1022 transitions. [2022-02-15 01:30:33,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-15 01:30:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1022 transitions. [2022-02-15 01:30:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-15 01:30:33,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:33,637 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:33,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:30:33,637 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:33,638 INFO L85 PathProgramCache]: Analyzing trace with hash -59750820, now seen corresponding path program 1 times [2022-02-15 01:30:33,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:33,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144287850] [2022-02-15 01:30:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:33,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:33,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:33,897 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:30:34,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:34,021 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:30:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-15 01:30:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 01:30:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 01:30:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 01:30:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-15 01:30:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 01:30:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 01:30:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 01:30:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-15 01:30:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-15 01:30:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-15 01:30:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-15 01:30:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-15 01:30:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-15 01:30:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-15 01:30:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-15 01:30:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-02-15 01:30:35,165 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:35,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144287850] [2022-02-15 01:30:35,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144287850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:35,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:35,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:30:35,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579119921] [2022-02-15 01:30:35,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:35,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:30:35,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:35,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:30:35,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:30:35,167 INFO L87 Difference]: Start difference. First operand 726 states and 1022 transitions. Second operand has 47 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 33 states have internal predecessors, (63), 12 states have call successors, (30), 11 states have call predecessors, (30), 8 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2022-02-15 01:30:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:37,073 INFO L93 Difference]: Finished difference Result 1028 states and 1449 transitions. [2022-02-15 01:30:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 01:30:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 33 states have internal predecessors, (63), 12 states have call successors, (30), 11 states have call predecessors, (30), 8 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) Word has length 182 [2022-02-15 01:30:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:37,078 INFO L225 Difference]: With dead ends: 1028 [2022-02-15 01:30:37,078 INFO L226 Difference]: Without dead ends: 1026 [2022-02-15 01:30:37,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 76 SyntacticMatches, 22 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1177, Invalid=10165, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 01:30:37,080 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 280 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:37,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 168 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 1734 Invalid, 0 Unknown, 401 Unchecked, 0.8s Time] [2022-02-15 01:30:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-02-15 01:30:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 917. [2022-02-15 01:30:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 491 states have (on average 1.2240325865580448) internal successors, (601), 525 states have internal predecessors, (601), 335 states have call successors, (335), 91 states have call predecessors, (335), 90 states have return successors, (334), 300 states have call predecessors, (334), 334 states have call successors, (334) [2022-02-15 01:30:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1270 transitions. [2022-02-15 01:30:37,279 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1270 transitions. Word has length 182 [2022-02-15 01:30:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:37,279 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1270 transitions. [2022-02-15 01:30:37,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 33 states have internal predecessors, (63), 12 states have call successors, (30), 11 states have call predecessors, (30), 8 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2022-02-15 01:30:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1270 transitions. [2022-02-15 01:30:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-15 01:30:37,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:37,283 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:37,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:30:37,283 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:37,283 INFO L85 PathProgramCache]: Analyzing trace with hash 827472026, now seen corresponding path program 1 times [2022-02-15 01:30:37,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:37,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845719392] [2022-02-15 01:30:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:37,407 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:37,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:37,547 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:30:37,656 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:37,656 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:30:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-15 01:30:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 01:30:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 01:30:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 01:30:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-15 01:30:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 01:30:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 01:30:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 01:30:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-15 01:30:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-15 01:30:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-15 01:30:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-02-15 01:30:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-15 01:30:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-15 01:30:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-15 01:30:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-15 01:30:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-15 01:30:38,537 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:38,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845719392] [2022-02-15 01:30:38,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [845719392] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:38,538 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:38,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 01:30:38,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511544473] [2022-02-15 01:30:38,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:38,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 01:30:38,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:38,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 01:30:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2038, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:30:38,540 INFO L87 Difference]: Start difference. First operand 917 states and 1270 transitions. Second operand has 48 states, 40 states have (on average 1.575) internal successors, (63), 32 states have internal predecessors, (63), 13 states have call successors, (30), 11 states have call predecessors, (30), 8 states have return successors, (28), 11 states have call predecessors, (28), 13 states have call successors, (28) [2022-02-15 01:30:39,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:39,879 INFO L93 Difference]: Finished difference Result 1259 states and 1733 transitions. [2022-02-15 01:30:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:30:39,879 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 40 states have (on average 1.575) internal successors, (63), 32 states have internal predecessors, (63), 13 states have call successors, (30), 11 states have call predecessors, (30), 8 states have return successors, (28), 11 states have call predecessors, (28), 13 states have call successors, (28) Word has length 182 [2022-02-15 01:30:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:39,884 INFO L225 Difference]: With dead ends: 1259 [2022-02-15 01:30:39,884 INFO L226 Difference]: Without dead ends: 1257 [2022-02-15 01:30:39,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 73 SyntacticMatches, 21 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 4498 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1135, Invalid=9785, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:30:39,886 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 172 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:39,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 423 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1397 Invalid, 0 Unknown, 269 Unchecked, 0.4s Time] [2022-02-15 01:30:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-02-15 01:30:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1164. [2022-02-15 01:30:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 632 states have (on average 1.2215189873417722) internal successors, (772), 676 states have internal predecessors, (772), 414 states have call successors, (414), 118 states have call predecessors, (414), 117 states have return successors, (413), 369 states have call predecessors, (413), 413 states have call successors, (413) [2022-02-15 01:30:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1599 transitions. [2022-02-15 01:30:40,173 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1599 transitions. Word has length 182 [2022-02-15 01:30:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:40,174 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 1599 transitions. [2022-02-15 01:30:40,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 40 states have (on average 1.575) internal successors, (63), 32 states have internal predecessors, (63), 13 states have call successors, (30), 11 states have call predecessors, (30), 8 states have return successors, (28), 11 states have call predecessors, (28), 13 states have call successors, (28) [2022-02-15 01:30:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1599 transitions. [2022-02-15 01:30:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-02-15 01:30:40,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:40,178 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:40,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:30:40,178 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:40,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:40,178 INFO L85 PathProgramCache]: Analyzing trace with hash -422609388, now seen corresponding path program 2 times [2022-02-15 01:30:40,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:40,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567289723] [2022-02-15 01:30:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:40,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:40,329 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:40,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:40,446 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:30:40,446 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:40,446 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:30:40,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:30:40,567 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:30:40,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 01:30:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 01:30:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-15 01:30:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-15 01:30:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 01:30:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 01:30:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 01:30:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-15 01:30:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 01:30:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 01:30:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-15 01:30:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-15 01:30:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-15 01:30:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-15 01:30:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-15 01:30:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-02-15 01:30:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-15 01:30:42,033 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:42,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567289723] [2022-02-15 01:30:42,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [567289723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:42,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:42,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 01:30:42,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885167246] [2022-02-15 01:30:42,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:42,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 01:30:42,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 01:30:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2567, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:30:42,035 INFO L87 Difference]: Start difference. First operand 1164 states and 1599 transitions. Second operand has 52 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 34 states have internal predecessors, (68), 14 states have call successors, (31), 12 states have call predecessors, (31), 9 states have return successors, (29), 11 states have call predecessors, (29), 14 states have call successors, (29) [2022-02-15 01:30:45,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:45,249 INFO L93 Difference]: Finished difference Result 2553 states and 3575 transitions. [2022-02-15 01:30:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 01:30:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 34 states have internal predecessors, (68), 14 states have call successors, (31), 12 states have call predecessors, (31), 9 states have return successors, (29), 11 states have call predecessors, (29), 14 states have call successors, (29) Word has length 196 [2022-02-15 01:30:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:45,252 INFO L225 Difference]: With dead ends: 2553 [2022-02-15 01:30:45,252 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 01:30:45,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 28 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 5478 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1903, Invalid=11669, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:30:45,258 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 319 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3473 mSolverCounterSat, 1256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 5295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1256 IncrementalHoareTripleChecker+Valid, 3473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:45,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 196 Invalid, 5295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1256 Valid, 3473 Invalid, 0 Unknown, 566 Unchecked, 1.4s Time] [2022-02-15 01:30:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 01:30:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 01:30:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 01:30:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 01:30:45,259 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 196 [2022-02-15 01:30:45,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:45,259 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 01:30:45,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 34 states have internal predecessors, (68), 14 states have call successors, (31), 12 states have call predecessors, (31), 9 states have return successors, (29), 11 states have call predecessors, (29), 14 states have call successors, (29) [2022-02-15 01:30:45,259 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 01:30:45,259 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 01:30:45,261 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 01:30:45,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:30:45,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-15 01:36:28,605 WARN L228 SmtUtils]: Spent 5.72m on a formula simplification. DAG size of input: 399 DAG size of output: 395 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)