/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/sum01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:45:38,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:45:38,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:45:38,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 02:45:38,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 02:45:38,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 02:45:38,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 02:45:38,386 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:45:38,392 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:45:38,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:45:38,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:45:38,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:45:38,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:45:38,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:45:38,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:45:38,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:45:38,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:45:38,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:45:38,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:45:38,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:45:38,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:45:38,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:45:38,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:45:38,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:38,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:45:38,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:45:38,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:45:38,397 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:45:38,397 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:45:38,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:45:38,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:45:38,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:45:38,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:45:38,618 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:45:38,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-2.i [2022-02-24 02:45:38,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c779b986f/59244231f7514efda8f6dbb27dd12431/FLAG62ed142f7 [2022-02-24 02:45:39,000 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:45:39,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i [2022-02-24 02:45:39,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c779b986f/59244231f7514efda8f6dbb27dd12431/FLAG62ed142f7 [2022-02-24 02:45:39,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c779b986f/59244231f7514efda8f6dbb27dd12431 [2022-02-24 02:45:39,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:45:39,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:45:39,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:39,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:45:39,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:45:39,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226c369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39, skipping insertion in model container [2022-02-24 02:45:39,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:45:39,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:45:39,171 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i[849,862] [2022-02-24 02:45:39,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:39,195 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:45:39,203 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i[849,862] [2022-02-24 02:45:39,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:39,216 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:45:39,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39 WrapperNode [2022-02-24 02:45:39,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:39,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:45:39,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:45:39,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:45:39,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:45:39,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:45:39,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:45:39,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:45:39,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39" (1/1) ... [2022-02-24 02:45:39,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:39,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:45:39,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 02:45:39,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 02:45:39,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:45:39,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:45:39,302 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:45:39,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:45:39,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:45:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:45:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:45:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:45:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:45:39,343 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:45:39,344 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:45:39,439 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:45:39,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:45:39,442 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 02:45:39,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:39 BoogieIcfgContainer [2022-02-24 02:45:39,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:45:39,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:45:39,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:45:39,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:45:39,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:45:39" (1/3) ... [2022-02-24 02:45:39,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3587f00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:39, skipping insertion in model container [2022-02-24 02:45:39,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:39" (2/3) ... [2022-02-24 02:45:39,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3587f00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:39, skipping insertion in model container [2022-02-24 02:45:39,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:39" (3/3) ... [2022-02-24 02:45:39,448 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-2.i [2022-02-24 02:45:39,451 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:45:39,452 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:45:39,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:45:39,481 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 02:45:39,481 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:45:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 02:45:39,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:39,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:39,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash -241432906, now seen corresponding path program 1 times [2022-02-24 02:45:39,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:39,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601343592] [2022-02-24 02:45:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:39,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:39,541 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:45:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:39,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:39,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:39,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601343592] [2022-02-24 02:45:39,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [601343592] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:39,748 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:39,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:39,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960197608] [2022-02-24 02:45:39,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:39,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:39,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:39,786 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:39,927 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-02-24 02:45:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:39,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 02:45:39,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:39,935 INFO L225 Difference]: With dead ends: 39 [2022-02-24 02:45:39,935 INFO L226 Difference]: Without dead ends: 15 [2022-02-24 02:45:39,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:39,942 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:39,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-24 02:45:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-24 02:45:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-02-24 02:45:39,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-02-24 02:45:39,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:39,971 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-02-24 02:45:39,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-02-24 02:45:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 02:45:39,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:39,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:39,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:45:39,972 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:39,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1042759188, now seen corresponding path program 1 times [2022-02-24 02:45:39,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:39,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577172357] [2022-02-24 02:45:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:40,195 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:40,385 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:40,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577172357] [2022-02-24 02:45:40,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1577172357] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:40,385 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:40,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:40,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774934085] [2022-02-24 02:45:40,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:40,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:40,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:40,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:40,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:40,387 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:40,482 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-02-24 02:45:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 02:45:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:40,483 INFO L225 Difference]: With dead ends: 22 [2022-02-24 02:45:40,483 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 02:45:40,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:45:40,484 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:40,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 43 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 02:45:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-24 02:45:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-02-24 02:45:40,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-02-24 02:45:40,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:40,489 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-02-24 02:45:40,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:40,489 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-02-24 02:45:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 02:45:40,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:40,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:40,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:45:40,490 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1799219726, now seen corresponding path program 2 times [2022-02-24 02:45:40,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:40,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788740300] [2022-02-24 02:45:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:40,603 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:40,729 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:40,929 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:40,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788740300] [2022-02-24 02:45:40,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788740300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:40,930 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:40,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:45:40,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740789668] [2022-02-24 02:45:40,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:40,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:45:40,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:40,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:45:40,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:45:40,934 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:41,064 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-02-24 02:45:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:45:41,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 02:45:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:41,065 INFO L225 Difference]: With dead ends: 24 [2022-02-24 02:45:41,065 INFO L226 Difference]: Without dead ends: 19 [2022-02-24 02:45:41,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:45:41,070 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:41,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-24 02:45:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-24 02:45:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-02-24 02:45:41,077 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2022-02-24 02:45:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:41,077 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-02-24 02:45:41,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-02-24 02:45:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 02:45:41,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:41,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:41,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 02:45:41,078 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:41,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1341755824, now seen corresponding path program 3 times [2022-02-24 02:45:41,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:41,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641434396] [2022-02-24 02:45:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:41,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:49,478 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:49,592 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:49,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:49,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:49,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641434396] [2022-02-24 02:45:49,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [641434396] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:49,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:49,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:45:49,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227796219] [2022-02-24 02:45:49,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:49,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:45:49,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:45:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:45:49,747 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:49,891 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-02-24 02:45:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:45:49,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 02:45:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:49,892 INFO L225 Difference]: With dead ends: 26 [2022-02-24 02:45:49,892 INFO L226 Difference]: Without dead ends: 21 [2022-02-24 02:45:49,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:45:49,893 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:49,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 63 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-24 02:45:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-02-24 02:45:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-02-24 02:45:49,896 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2022-02-24 02:45:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:49,896 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-02-24 02:45:49,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-02-24 02:45:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 02:45:49,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:49,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:49,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 02:45:49,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:49,898 INFO L85 PathProgramCache]: Analyzing trace with hash 194389806, now seen corresponding path program 4 times [2022-02-24 02:45:49,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:49,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255939395] [2022-02-24 02:45:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:49,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:50,064 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:50,187 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:50,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:50,374 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:50,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255939395] [2022-02-24 02:45:50,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255939395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:50,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:50,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:45:50,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969954297] [2022-02-24 02:45:50,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:50,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:45:50,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:50,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:45:50,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:50,376 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:50,552 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-02-24 02:45:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:45:50,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 02:45:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:50,553 INFO L225 Difference]: With dead ends: 28 [2022-02-24 02:45:50,553 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 02:45:50,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:45:50,554 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:50,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 73 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 02:45:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-24 02:45:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-02-24 02:45:50,558 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2022-02-24 02:45:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:50,558 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-02-24 02:45:50,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-02-24 02:45:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 02:45:50,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:50,558 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:50,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 02:45:50,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1038409588, now seen corresponding path program 5 times [2022-02-24 02:45:50,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:50,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615497303] [2022-02-24 02:45:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:50,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:50,662 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:50,729 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:50,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:50,973 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:50,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615497303] [2022-02-24 02:45:50,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615497303] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:50,974 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:50,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:45:50,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385552191] [2022-02-24 02:45:50,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:50,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:45:50,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:45:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:50,975 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:51,260 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-02-24 02:45:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:45:51,260 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 02:45:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:51,261 INFO L225 Difference]: With dead ends: 30 [2022-02-24 02:45:51,261 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 02:45:51,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:45:51,262 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:51,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 02:45:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-24 02:45:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-02-24 02:45:51,266 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-02-24 02:45:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:51,266 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-02-24 02:45:51,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-02-24 02:45:51,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 02:45:51,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:51,267 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:51,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 02:45:51,267 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:51,267 INFO L85 PathProgramCache]: Analyzing trace with hash -347653526, now seen corresponding path program 6 times [2022-02-24 02:45:51,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:51,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760987277] [2022-02-24 02:45:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:51,414 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:51,547 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:51,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:51,761 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:51,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760987277] [2022-02-24 02:45:51,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760987277] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:51,761 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:51,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:45:51,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945482918] [2022-02-24 02:45:51,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:51,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:45:51,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:45:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:51,762 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 19 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:52,055 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-02-24 02:45:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:45:52,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 02:45:52,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:52,056 INFO L225 Difference]: With dead ends: 32 [2022-02-24 02:45:52,056 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 02:45:52,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:45:52,057 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:52,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 02:45:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 02:45:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-02-24 02:45:52,060 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2022-02-24 02:45:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:52,061 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-02-24 02:45:52,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-02-24 02:45:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 02:45:52,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:52,061 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:52,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 02:45:52,061 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:52,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2043958472, now seen corresponding path program 7 times [2022-02-24 02:45:52,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:52,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70808190] [2022-02-24 02:45:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:52,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:52,211 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:52,345 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:52,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:52,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:52,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70808190] [2022-02-24 02:45:52,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [70808190] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:52,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:52,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:45:52,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711993620] [2022-02-24 02:45:52,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:52,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:45:52,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:45:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:45:52,634 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 21 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:52,973 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-02-24 02:45:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:45:52,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 02:45:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:52,974 INFO L225 Difference]: With dead ends: 34 [2022-02-24 02:45:52,974 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 02:45:52,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 02:45:52,976 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:52,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 02:45:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-24 02:45:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-02-24 02:45:52,979 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-02-24 02:45:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:52,980 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-02-24 02:45:52,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-02-24 02:45:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 02:45:52,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:52,980 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:52,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 02:45:52,980 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:52,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1719382106, now seen corresponding path program 8 times [2022-02-24 02:45:52,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:52,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010444214] [2022-02-24 02:45:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:52,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:53,098 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:53,227 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:53,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:53,538 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:53,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010444214] [2022-02-24 02:45:53,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010444214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:53,538 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:53,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:45:53,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137388636] [2022-02-24 02:45:53,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:53,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:45:53,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:45:53,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:53,540 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:53,974 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-02-24 02:45:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:45:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 02:45:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:53,975 INFO L225 Difference]: With dead ends: 36 [2022-02-24 02:45:53,975 INFO L226 Difference]: Without dead ends: 31 [2022-02-24 02:45:53,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 02:45:53,976 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:53,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 113 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-24 02:45:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-24 02:45:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-02-24 02:45:53,979 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-02-24 02:45:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:53,979 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-02-24 02:45:53,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-02-24 02:45:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 02:45:53,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:53,980 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:53,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 02:45:53,980 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1927214332, now seen corresponding path program 9 times [2022-02-24 02:45:53,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:53,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366061607] [2022-02-24 02:45:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:53,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:54,070 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:54,184 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:54,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:54,512 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:54,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366061607] [2022-02-24 02:45:54,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366061607] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:54,512 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:54,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:45:54,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661782215] [2022-02-24 02:45:54,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:54,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:45:54,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:45:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:45:54,513 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 25 states, 25 states have (on average 1.04) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:54,983 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-02-24 02:45:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:45:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.04) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 02:45:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:54,984 INFO L225 Difference]: With dead ends: 38 [2022-02-24 02:45:54,984 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 02:45:54,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 02:45:54,985 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:54,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 123 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 02:45:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-24 02:45:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-02-24 02:45:54,989 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2022-02-24 02:45:54,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:54,989 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-02-24 02:45:54,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.04) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-02-24 02:45:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 02:45:54,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:54,990 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:54,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 02:45:54,990 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:54,990 INFO L85 PathProgramCache]: Analyzing trace with hash 209479394, now seen corresponding path program 10 times [2022-02-24 02:45:54,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:54,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535074327] [2022-02-24 02:45:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:54,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:55,107 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:55,219 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:55,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:55,630 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:55,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535074327] [2022-02-24 02:45:55,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [535074327] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:55,630 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:55,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:45:55,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363573636] [2022-02-24 02:45:55,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:55,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:45:55,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:55,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:45:55,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:45:55,632 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 27 states, 27 states have (on average 1.037037037037037) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:56,238 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-02-24 02:45:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 02:45:56,238 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.037037037037037) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 02:45:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:56,239 INFO L225 Difference]: With dead ends: 40 [2022-02-24 02:45:56,239 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 02:45:56,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=2302, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 02:45:56,240 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:56,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 133 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 02:45:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-24 02:45:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-02-24 02:45:56,244 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2022-02-24 02:45:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:56,244 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-02-24 02:45:56,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.037037037037037) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-02-24 02:45:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 02:45:56,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:56,245 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:56,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 02:45:56,245 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:56,246 INFO L85 PathProgramCache]: Analyzing trace with hash 577782592, now seen corresponding path program 11 times [2022-02-24 02:45:56,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:56,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194840025] [2022-02-24 02:45:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:56,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:56,366 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:56,457 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:56,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:56,891 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:56,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194840025] [2022-02-24 02:45:56,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194840025] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:56,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:56,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:45:56,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390241043] [2022-02-24 02:45:56,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:56,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:45:56,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:45:56,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=810, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:45:56,892 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 29 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:57,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:57,428 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-02-24 02:45:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 02:45:57,429 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 02:45:57,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:57,429 INFO L225 Difference]: With dead ends: 42 [2022-02-24 02:45:57,429 INFO L226 Difference]: Without dead ends: 37 [2022-02-24 02:45:57,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=2702, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 02:45:57,432 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:57,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-24 02:45:57,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-24 02:45:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-02-24 02:45:57,436 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2022-02-24 02:45:57,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:57,437 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-02-24 02:45:57,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:57,437 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-02-24 02:45:57,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 02:45:57,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:57,437 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:57,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 02:45:57,438 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:57,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1965129698, now seen corresponding path program 12 times [2022-02-24 02:45:57,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:57,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427762879] [2022-02-24 02:45:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:57,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:57,561 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:57,666 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:57,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:58,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:58,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427762879] [2022-02-24 02:45:58,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [427762879] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:58,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:58,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:45:58,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364114744] [2022-02-24 02:45:58,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:58,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:45:58,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:45:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=928, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:45:58,248 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 31 states, 31 states have (on average 1.032258064516129) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:58,725 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-02-24 02:45:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 02:45:58,726 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.032258064516129) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 02:45:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:58,726 INFO L225 Difference]: With dead ends: 44 [2022-02-24 02:45:58,726 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 02:45:58,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=3134, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 02:45:58,728 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:58,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 148 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:58,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 02:45:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-24 02:45:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-02-24 02:45:58,736 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2022-02-24 02:45:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:58,736 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-02-24 02:45:58,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.032258064516129) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-02-24 02:45:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 02:45:58,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:58,737 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:58,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 02:45:58,737 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:58,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1867448964, now seen corresponding path program 13 times [2022-02-24 02:45:58,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:58,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076858437] [2022-02-24 02:45:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:58,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:58,824 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:58,889 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:45:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:58,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:59,408 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:59,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076858437] [2022-02-24 02:45:59,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076858437] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:59,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:59,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 02:45:59,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635661554] [2022-02-24 02:45:59,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:59,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 02:45:59,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:59,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 02:45:59,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1054, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:45:59,412 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 33 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:00,137 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-02-24 02:46:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 02:46:00,138 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 02:46:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:00,138 INFO L225 Difference]: With dead ends: 46 [2022-02-24 02:46:00,138 INFO L226 Difference]: Without dead ends: 41 [2022-02-24 02:46:00,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=3598, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 02:46:00,140 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:00,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:46:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-24 02:46:00,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-24 02:46:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-02-24 02:46:00,144 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2022-02-24 02:46:00,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:00,144 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-02-24 02:46:00,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:00,145 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-02-24 02:46:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 02:46:00,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:00,145 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:00,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 02:46:00,145 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:00,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1809423194, now seen corresponding path program 14 times [2022-02-24 02:46:00,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:00,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892569748] [2022-02-24 02:46:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:00,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:00,270 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:00,333 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:00,770 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:00,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892569748] [2022-02-24 02:46:00,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892569748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:00,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:00,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 02:46:00,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593475735] [2022-02-24 02:46:00,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:00,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 02:46:00,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 02:46:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1188, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:46:00,771 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 35 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:01,374 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-02-24 02:46:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 02:46:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 02:46:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:01,375 INFO L225 Difference]: With dead ends: 48 [2022-02-24 02:46:01,375 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 02:46:01,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=4094, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 02:46:01,377 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:01,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 168 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:46:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 02:46:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-24 02:46:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-02-24 02:46:01,380 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2022-02-24 02:46:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:01,381 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-02-24 02:46:01,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-02-24 02:46:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 02:46:01,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:01,384 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:01,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 02:46:01,384 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:01,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash 525482424, now seen corresponding path program 15 times [2022-02-24 02:46:01,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:01,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545153031] [2022-02-24 02:46:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:01,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:01,480 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:01,582 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:01,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:02,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:02,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545153031] [2022-02-24 02:46:02,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [545153031] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:02,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:02,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 02:46:02,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810262397] [2022-02-24 02:46:02,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:02,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 02:46:02,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 02:46:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1330, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 02:46:02,097 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 37 states, 37 states have (on average 1.027027027027027) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:03,058 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-02-24 02:46:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 02:46:03,058 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.027027027027027) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 02:46:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:03,059 INFO L225 Difference]: With dead ends: 50 [2022-02-24 02:46:03,059 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 02:46:03,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=4622, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 02:46:03,060 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:03,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 183 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 02:46:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-24 02:46:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-02-24 02:46:03,064 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-02-24 02:46:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:03,064 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-02-24 02:46:03,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.027027027027027) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-02-24 02:46:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 02:46:03,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:03,065 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:03,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 02:46:03,065 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash -685983594, now seen corresponding path program 16 times [2022-02-24 02:46:03,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:03,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539144670] [2022-02-24 02:46:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:03,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:03,154 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:03,275 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:03,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:03,934 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:03,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539144670] [2022-02-24 02:46:03,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539144670] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:03,935 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:03,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 02:46:03,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905333196] [2022-02-24 02:46:03,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:03,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 02:46:03,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 02:46:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 02:46:03,936 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:05,079 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-02-24 02:46:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 02:46:05,079 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 02:46:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:05,080 INFO L225 Difference]: With dead ends: 52 [2022-02-24 02:46:05,080 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 02:46:05,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=308, Invalid=5698, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:46:05,082 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:05,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 192 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 02:46:05,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-24 02:46:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-02-24 02:46:05,086 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2022-02-24 02:46:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:05,086 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-02-24 02:46:05,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-02-24 02:46:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 02:46:05,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:05,086 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:05,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 02:46:05,087 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash -968689676, now seen corresponding path program 17 times [2022-02-24 02:46:05,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:05,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903675481] [2022-02-24 02:46:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:05,182 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:05,305 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:05,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:05,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903675481] [2022-02-24 02:46:05,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [903675481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:05,910 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:05,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 02:46:05,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935363424] [2022-02-24 02:46:05,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:05,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 02:46:05,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 02:46:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1638, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 02:46:05,911 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 41 states, 41 states have (on average 1.024390243902439) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:07,035 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-02-24 02:46:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 02:46:07,036 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.024390243902439) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 02:46:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:07,036 INFO L225 Difference]: With dead ends: 54 [2022-02-24 02:46:07,036 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 02:46:07,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=232, Invalid=5774, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:46:07,038 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:07,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 203 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 02:46:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-24 02:46:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-02-24 02:46:07,042 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2022-02-24 02:46:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:07,042 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-02-24 02:46:07,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.024390243902439) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:07,042 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-02-24 02:46:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 02:46:07,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:07,042 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:07,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 02:46:07,043 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2066294830, now seen corresponding path program 18 times [2022-02-24 02:46:07,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:07,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779157614] [2022-02-24 02:46:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:07,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:07,165 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:07,276 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:08,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:08,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779157614] [2022-02-24 02:46:08,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [779157614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:08,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:08,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 02:46:08,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65402178] [2022-02-24 02:46:08,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:08,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 02:46:08,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 02:46:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1804, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 02:46:08,109 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 43 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:09,341 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-02-24 02:46:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 02:46:09,341 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 02:46:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:09,342 INFO L225 Difference]: With dead ends: 56 [2022-02-24 02:46:09,342 INFO L226 Difference]: Without dead ends: 51 [2022-02-24 02:46:09,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=244, Invalid=6398, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 02:46:09,344 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:09,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 213 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-24 02:46:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-24 02:46:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-02-24 02:46:09,349 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2022-02-24 02:46:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:09,349 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-02-24 02:46:09,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-02-24 02:46:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 02:46:09,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:09,350 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:09,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 02:46:09,350 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:09,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:09,350 INFO L85 PathProgramCache]: Analyzing trace with hash -302893008, now seen corresponding path program 19 times [2022-02-24 02:46:09,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:09,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005708269] [2022-02-24 02:46:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:09,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:09,407 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:09,510 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:10,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:10,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005708269] [2022-02-24 02:46:10,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1005708269] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:10,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:10,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 02:46:10,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153237317] [2022-02-24 02:46:10,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:10,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 02:46:10,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 02:46:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1978, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 02:46:10,257 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 45 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:11,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:11,323 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-02-24 02:46:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 02:46:11,323 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 02:46:11,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:11,324 INFO L225 Difference]: With dead ends: 58 [2022-02-24 02:46:11,324 INFO L226 Difference]: Without dead ends: 53 [2022-02-24 02:46:11,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=256, Invalid=7054, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 02:46:11,325 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:11,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 218 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-24 02:46:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-24 02:46:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-02-24 02:46:11,328 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2022-02-24 02:46:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:11,329 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-02-24 02:46:11,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-02-24 02:46:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 02:46:11,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:11,329 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:11,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 02:46:11,329 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2109143310, now seen corresponding path program 20 times [2022-02-24 02:46:11,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:11,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965053215] [2022-02-24 02:46:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:11,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:11,390 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:11,480 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:11,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:12,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:12,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965053215] [2022-02-24 02:46:12,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965053215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:12,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:12,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 02:46:12,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474580001] [2022-02-24 02:46:12,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:12,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 02:46:12,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 02:46:12,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 02:46:12,365 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 47 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:13,744 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-02-24 02:46:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 02:46:13,744 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 02:46:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:13,745 INFO L225 Difference]: With dead ends: 60 [2022-02-24 02:46:13,745 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 02:46:13,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=308, Invalid=7702, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 02:46:13,746 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:13,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 228 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 02:46:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-24 02:46:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-02-24 02:46:13,750 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2022-02-24 02:46:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:13,750 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-02-24 02:46:13,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:13,750 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-02-24 02:46:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 02:46:13,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:13,751 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:13,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 02:46:13,751 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 793705068, now seen corresponding path program 21 times [2022-02-24 02:46:13,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:13,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324945427] [2022-02-24 02:46:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:13,841 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:13,928 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:13,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:15,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:15,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324945427] [2022-02-24 02:46:15,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [324945427] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:15,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:15,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 02:46:15,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395368412] [2022-02-24 02:46:15,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:15,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 02:46:15,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 02:46:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2350, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 02:46:15,010 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 49 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:16,666 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-02-24 02:46:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 02:46:16,667 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 02:46:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:16,667 INFO L225 Difference]: With dead ends: 62 [2022-02-24 02:46:16,667 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 02:46:16,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=280, Invalid=8462, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 02:46:16,670 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:16,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 238 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:16,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 02:46:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-24 02:46:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-02-24 02:46:16,673 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2022-02-24 02:46:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:16,674 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-02-24 02:46:16,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-02-24 02:46:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 02:46:16,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:16,674 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:16,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 02:46:16,674 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:16,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:16,675 INFO L85 PathProgramCache]: Analyzing trace with hash -622060470, now seen corresponding path program 22 times [2022-02-24 02:46:16,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:16,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409762668] [2022-02-24 02:46:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:16,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:16,797 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:16,891 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:17,991 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:17,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409762668] [2022-02-24 02:46:17,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409762668] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:17,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:17,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 02:46:17,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285773417] [2022-02-24 02:46:17,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:17,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 02:46:17,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:17,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 02:46:17,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2548, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 02:46:17,993 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 51 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:19,277 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-02-24 02:46:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 02:46:19,278 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 02:46:19,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:19,278 INFO L225 Difference]: With dead ends: 64 [2022-02-24 02:46:19,278 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 02:46:19,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=292, Invalid=9214, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 02:46:19,280 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 2494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:19,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 248 Invalid, 2494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 02:46:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-24 02:46:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-02-24 02:46:19,284 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2022-02-24 02:46:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:19,284 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-02-24 02:46:19,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-02-24 02:46:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:19,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:19,285 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:19,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 02:46:19,285 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash 331890344, now seen corresponding path program 23 times [2022-02-24 02:46:19,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:19,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899576380] [2022-02-24 02:46:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:19,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:19,373 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:19,428 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:19,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:20,458 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:20,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899576380] [2022-02-24 02:46:20,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1899576380] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:20,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:20,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 02:46:20,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677430642] [2022-02-24 02:46:20,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:20,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 02:46:20,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 02:46:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2754, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 02:46:20,475 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 53 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:21,882 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-02-24 02:46:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 02:46:21,883 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 02:46:21,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:21,884 INFO L225 Difference]: With dead ends: 66 [2022-02-24 02:46:21,884 INFO L226 Difference]: Without dead ends: 61 [2022-02-24 02:46:21,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=304, Invalid=9998, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 02:46:21,886 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:21,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 263 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-24 02:46:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-24 02:46:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-02-24 02:46:21,890 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2022-02-24 02:46:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:21,890 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-02-24 02:46:21,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-02-24 02:46:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 02:46:21,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:21,891 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:21,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 02:46:21,891 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:21,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2044378746, now seen corresponding path program 24 times [2022-02-24 02:46:21,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:21,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996426477] [2022-02-24 02:46:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:21,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:21,952 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:22,017 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:22,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:23,434 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:23,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996426477] [2022-02-24 02:46:23,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1996426477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:23,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:23,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 02:46:23,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916690280] [2022-02-24 02:46:23,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:23,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 02:46:23,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:23,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 02:46:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 02:46:23,436 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:25,504 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-02-24 02:46:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 02:46:25,505 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 02:46:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:25,505 INFO L225 Difference]: With dead ends: 68 [2022-02-24 02:46:25,505 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 02:46:25,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=436, Invalid=11554, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 02:46:25,507 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:25,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 272 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:46:25,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 02:46:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-24 02:46:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:25,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-02-24 02:46:25,511 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2022-02-24 02:46:25,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:25,511 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-02-24 02:46:25,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-02-24 02:46:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 02:46:25,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:25,511 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:25,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 02:46:25,511 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:25,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:25,512 INFO L85 PathProgramCache]: Analyzing trace with hash -716372764, now seen corresponding path program 25 times [2022-02-24 02:46:25,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:25,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317281668] [2022-02-24 02:46:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:25,622 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:25,685 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:25,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:26,762 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:26,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317281668] [2022-02-24 02:46:26,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [317281668] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:26,762 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:26,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 02:46:26,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058191939] [2022-02-24 02:46:26,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:26,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 02:46:26,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 02:46:26,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3190, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 02:46:26,764 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 57 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:28,689 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-02-24 02:46:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 02:46:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 02:46:28,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:28,690 INFO L225 Difference]: With dead ends: 70 [2022-02-24 02:46:28,690 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 02:46:28,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=328, Invalid=11662, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 02:46:28,691 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3132 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 3185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:28,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 283 Invalid, 3185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3132 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:46:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 02:46:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-02-24 02:46:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-02-24 02:46:28,696 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2022-02-24 02:46:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:28,696 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-02-24 02:46:28,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-02-24 02:46:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 02:46:28,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:28,697 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:28,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 02:46:28,697 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash -107910974, now seen corresponding path program 26 times [2022-02-24 02:46:28,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:28,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902935179] [2022-02-24 02:46:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:28,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:28,813 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:28,934 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:28,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:30,446 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:30,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902935179] [2022-02-24 02:46:30,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [902935179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:30,446 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:30,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 02:46:30,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445169567] [2022-02-24 02:46:30,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:30,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 02:46:30,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:30,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 02:46:30,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3420, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 02:46:30,448 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 59 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:32,838 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-02-24 02:46:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 02:46:32,839 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 02:46:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:32,839 INFO L225 Difference]: With dead ends: 72 [2022-02-24 02:46:32,839 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 02:46:32,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=340, Invalid=12542, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 02:46:32,841 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 3360 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 3415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:32,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 293 Invalid, 3415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3360 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:46:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 02:46:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-24 02:46:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-02-24 02:46:32,845 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2022-02-24 02:46:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:32,845 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-02-24 02:46:32,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-02-24 02:46:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:46:32,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:32,846 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:32,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 02:46:32,846 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash 508316960, now seen corresponding path program 27 times [2022-02-24 02:46:32,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:32,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658531742] [2022-02-24 02:46:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:32,952 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:33,046 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:33,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:34,484 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:34,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658531742] [2022-02-24 02:46:34,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658531742] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:34,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:34,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 02:46:34,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348547214] [2022-02-24 02:46:34,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:34,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 02:46:34,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:34,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 02:46:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3658, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 02:46:34,486 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 61 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:36,950 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-02-24 02:46:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 02:46:36,950 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 02:46:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:36,951 INFO L225 Difference]: With dead ends: 74 [2022-02-24 02:46:36,951 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 02:46:36,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=352, Invalid=13454, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 02:46:36,952 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 3537 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 3594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:36,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 298 Invalid, 3594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3537 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:46:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 02:46:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-02-24 02:46:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-02-24 02:46:36,956 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2022-02-24 02:46:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:36,956 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-02-24 02:46:36,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-02-24 02:46:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:46:36,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:36,956 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:36,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 02:46:36,956 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:36,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2125314, now seen corresponding path program 28 times [2022-02-24 02:46:36,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:36,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594018956] [2022-02-24 02:46:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:36,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:37,085 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:37,210 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:37,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:38,964 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:38,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594018956] [2022-02-24 02:46:38,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1594018956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:38,964 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:38,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 02:46:38,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076433951] [2022-02-24 02:46:38,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:38,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 02:46:38,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 02:46:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=3904, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 02:46:38,966 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 63 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:41,339 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-02-24 02:46:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 02:46:41,339 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:46:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:41,340 INFO L225 Difference]: With dead ends: 76 [2022-02-24 02:46:41,340 INFO L226 Difference]: Without dead ends: 71 [2022-02-24 02:46:41,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=364, Invalid=14398, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 02:46:41,346 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 3840 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 3899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:41,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 3899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3840 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:46:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-24 02:46:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-02-24 02:46:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-02-24 02:46:41,351 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2022-02-24 02:46:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:41,351 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-02-24 02:46:41,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-02-24 02:46:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 02:46:41,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:41,352 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:41,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 02:46:41,352 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:41,352 INFO L85 PathProgramCache]: Analyzing trace with hash -910878884, now seen corresponding path program 29 times [2022-02-24 02:46:41,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:41,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290380285] [2022-02-24 02:46:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:41,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:41,465 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:41,552 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:41,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:43,080 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:43,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290380285] [2022-02-24 02:46:43,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1290380285] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:43,081 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:43,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 02:46:43,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300016952] [2022-02-24 02:46:43,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:43,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 02:46:43,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 02:46:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 02:46:43,082 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 65 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:45,539 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-02-24 02:46:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 02:46:45,540 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 02:46:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:45,540 INFO L225 Difference]: With dead ends: 78 [2022-02-24 02:46:45,540 INFO L226 Difference]: Without dead ends: 73 [2022-02-24 02:46:45,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=370, Invalid=15130, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 02:46:45,542 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 4029 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 4029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:45,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 318 Invalid, 4090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 4029 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:46:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-24 02:46:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-02-24 02:46:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-02-24 02:46:45,557 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2022-02-24 02:46:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:45,557 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-02-24 02:46:45,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-02-24 02:46:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:46:45,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:45,558 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:45,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 02:46:45,558 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1950268730, now seen corresponding path program 30 times [2022-02-24 02:46:45,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:45,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472426211] [2022-02-24 02:46:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:45,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:45,689 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:45,789 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:45,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:47,133 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:47,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472426211] [2022-02-24 02:46:47,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [472426211] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:47,134 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:47,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 02:46:47,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310048164] [2022-02-24 02:46:47,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:47,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 02:46:47,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 02:46:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 02:46:47,143 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 67 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:49,870 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-02-24 02:46:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 02:46:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 02:46:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:49,871 INFO L225 Difference]: With dead ends: 80 [2022-02-24 02:46:49,871 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 02:46:49,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=382, Invalid=16130, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 02:46:49,873 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 4287 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 4350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:49,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 328 Invalid, 4350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4287 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:46:49,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 02:46:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-02-24 02:46:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-02-24 02:46:49,877 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2022-02-24 02:46:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:49,878 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-02-24 02:46:49,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-02-24 02:46:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 02:46:49,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:49,878 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:49,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 02:46:49,878 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1560910952, now seen corresponding path program 31 times [2022-02-24 02:46:49,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:49,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287368565] [2022-02-24 02:46:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:49,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:49,981 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:50,126 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:50,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:51,763 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:51,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287368565] [2022-02-24 02:46:51,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [287368565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:51,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:51,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 02:46:51,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33263756] [2022-02-24 02:46:51,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:51,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 02:46:51,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 02:46:51,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4690, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 02:46:51,765 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 69 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:54,307 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-02-24 02:46:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 02:46:54,307 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 02:46:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:54,308 INFO L225 Difference]: With dead ends: 82 [2022-02-24 02:46:54,308 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 02:46:54,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=400, Invalid=17422, Unknown=0, NotChecked=0, Total=17822 [2022-02-24 02:46:54,311 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 4553 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 4618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:54,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 338 Invalid, 4618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 4553 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:46:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 02:46:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-02-24 02:46:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-02-24 02:46:54,320 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2022-02-24 02:46:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:54,323 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-02-24 02:46:54,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-02-24 02:46:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 02:46:54,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:54,324 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:54,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 02:46:54,324 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 39709302, now seen corresponding path program 32 times [2022-02-24 02:46:54,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:54,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667501330] [2022-02-24 02:46:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:54,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:54,468 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:54,598 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:54,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:56,636 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:56,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667501330] [2022-02-24 02:46:56,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [667501330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:56,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:56,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 02:46:56,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422230561] [2022-02-24 02:46:56,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:56,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 02:46:56,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:56,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 02:46:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 02:46:56,638 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:59,657 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-02-24 02:46:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 02:46:59,657 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 02:46:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:59,658 INFO L225 Difference]: With dead ends: 84 [2022-02-24 02:46:59,658 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 02:46:59,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=564, Invalid=19458, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 02:46:59,660 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 4897 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 4966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:59,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 352 Invalid, 4966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4897 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:46:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 02:46:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-02-24 02:46:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-02-24 02:46:59,665 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2022-02-24 02:46:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:59,665 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-02-24 02:46:59,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-02-24 02:46:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 02:46:59,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:59,666 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:59,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 02:46:59,666 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash 637481428, now seen corresponding path program 33 times [2022-02-24 02:46:59,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:59,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30428839] [2022-02-24 02:46:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:59,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:59,770 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:59,828 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:46:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:59,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:01,752 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:01,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30428839] [2022-02-24 02:47:01,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [30428839] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:01,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:01,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 02:47:01,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79875006] [2022-02-24 02:47:01,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:01,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 02:47:01,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:01,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 02:47:01,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5254, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 02:47:01,754 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 73 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:05,300 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-02-24 02:47:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 02:47:05,301 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-24 02:47:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:05,307 INFO L225 Difference]: With dead ends: 86 [2022-02-24 02:47:05,307 INFO L226 Difference]: Without dead ends: 81 [2022-02-24 02:47:05,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=424, Invalid=19598, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 02:47:05,314 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 5180 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 5249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 5180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:05,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 363 Invalid, 5249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 5180 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:47:05,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-24 02:47:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-02-24 02:47:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-02-24 02:47:05,325 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2022-02-24 02:47:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:05,325 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-02-24 02:47:05,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-02-24 02:47:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 02:47:05,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:05,326 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:05,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 02:47:05,326 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash -429123150, now seen corresponding path program 34 times [2022-02-24 02:47:05,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:05,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517839157] [2022-02-24 02:47:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:05,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:05,427 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:05,523 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:05,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:07,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:07,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517839157] [2022-02-24 02:47:07,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [517839157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:07,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:07,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 02:47:07,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137064532] [2022-02-24 02:47:07,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:07,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 02:47:07,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 02:47:07,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5548, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 02:47:07,784 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 75 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:11,665 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-02-24 02:47:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 02:47:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-24 02:47:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:11,666 INFO L225 Difference]: With dead ends: 88 [2022-02-24 02:47:11,666 INFO L226 Difference]: Without dead ends: 83 [2022-02-24 02:47:11,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=436, Invalid=20734, Unknown=0, NotChecked=0, Total=21170 [2022-02-24 02:47:11,668 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 5472 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 5543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 5472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:11,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 373 Invalid, 5543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 5472 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 02:47:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-24 02:47:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-02-24 02:47:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-02-24 02:47:11,674 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2022-02-24 02:47:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:11,675 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-02-24 02:47:11,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-02-24 02:47:11,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 02:47:11,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:11,675 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:11,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 02:47:11,676 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1061061136, now seen corresponding path program 35 times [2022-02-24 02:47:11,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:11,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922995499] [2022-02-24 02:47:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:11,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:11,857 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:11,979 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:14,317 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:14,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922995499] [2022-02-24 02:47:14,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [922995499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:14,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:14,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 02:47:14,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597272570] [2022-02-24 02:47:14,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:14,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 02:47:14,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:14,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 02:47:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=5850, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:47:14,320 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 77 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:18,111 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-02-24 02:47:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 02:47:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-24 02:47:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:18,112 INFO L225 Difference]: With dead ends: 90 [2022-02-24 02:47:18,112 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 02:47:18,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=448, Invalid=21902, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 02:47:18,114 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 5697 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 5770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 5697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:18,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 378 Invalid, 5770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 5697 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 02:47:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 02:47:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-24 02:47:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-02-24 02:47:18,119 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2022-02-24 02:47:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:18,119 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-02-24 02:47:18,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-02-24 02:47:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 02:47:18,120 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:18,120 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:18,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 02:47:18,120 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1390916882, now seen corresponding path program 36 times [2022-02-24 02:47:18,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:18,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876140477] [2022-02-24 02:47:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:18,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:18,203 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:18,285 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:20,585 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:20,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876140477] [2022-02-24 02:47:20,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876140477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:20,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:20,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 02:47:20,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011780738] [2022-02-24 02:47:20,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:20,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 02:47:20,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:20,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 02:47:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6160, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 02:47:20,587 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 79 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 77 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:23,785 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-02-24 02:47:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 02:47:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 77 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-02-24 02:47:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:23,786 INFO L225 Difference]: With dead ends: 92 [2022-02-24 02:47:23,786 INFO L226 Difference]: Without dead ends: 87 [2022-02-24 02:47:23,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=460, Invalid=23102, Unknown=0, NotChecked=0, Total=23562 [2022-02-24 02:47:23,788 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 6003 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 6078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 6003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:23,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 388 Invalid, 6078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 6003 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 02:47:23,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-24 02:47:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-02-24 02:47:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-02-24 02:47:23,792 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2022-02-24 02:47:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:23,793 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-02-24 02:47:23,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 77 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-02-24 02:47:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 02:47:23,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:23,793 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:23,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 02:47:23,793 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:23,794 INFO L85 PathProgramCache]: Analyzing trace with hash 195253324, now seen corresponding path program 37 times [2022-02-24 02:47:23,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:23,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355285121] [2022-02-24 02:47:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:23,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:23,904 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:24,015 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:24,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:26,737 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:26,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355285121] [2022-02-24 02:47:26,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355285121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:26,738 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:26,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 02:47:26,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232206368] [2022-02-24 02:47:26,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:26,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 02:47:26,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 02:47:26,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=6478, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 02:47:26,745 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 81 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:30,499 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-02-24 02:47:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 02:47:30,500 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-24 02:47:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:30,500 INFO L225 Difference]: With dead ends: 94 [2022-02-24 02:47:30,500 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 02:47:30,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=472, Invalid=24334, Unknown=0, NotChecked=0, Total=24806 [2022-02-24 02:47:30,502 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 6317 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 6394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 6317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:30,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 398 Invalid, 6394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 6317 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 02:47:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 02:47:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-02-24 02:47:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-02-24 02:47:30,507 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2022-02-24 02:47:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:30,507 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-02-24 02:47:30,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-02-24 02:47:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 02:47:30,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:30,508 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:30,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 02:47:30,508 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash -208568790, now seen corresponding path program 38 times [2022-02-24 02:47:30,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:30,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341812871] [2022-02-24 02:47:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:30,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:30,623 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:30,713 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:30,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:33,253 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:33,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341812871] [2022-02-24 02:47:33,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [341812871] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:33,254 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:33,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 02:47:33,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155779527] [2022-02-24 02:47:33,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:33,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 02:47:33,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 02:47:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=6804, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 02:47:33,255 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 83 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:36,669 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-02-24 02:47:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 02:47:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-02-24 02:47:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:36,673 INFO L225 Difference]: With dead ends: 96 [2022-02-24 02:47:36,673 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 02:47:36,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=484, Invalid=25598, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 02:47:36,675 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 6720 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 6799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 6720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:36,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 413 Invalid, 6799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 6720 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 02:47:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 02:47:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-02-24 02:47:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-02-24 02:47:36,688 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2022-02-24 02:47:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:36,689 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-02-24 02:47:36,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-02-24 02:47:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-24 02:47:36,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:36,690 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:36,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 02:47:36,690 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:36,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1734563704, now seen corresponding path program 39 times [2022-02-24 02:47:36,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:36,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229260544] [2022-02-24 02:47:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:36,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:36,789 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:36,919 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:36,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:39,554 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:39,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229260544] [2022-02-24 02:47:39,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [229260544] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:39,555 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:39,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-24 02:47:39,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912073247] [2022-02-24 02:47:39,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:39,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-24 02:47:39,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-24 02:47:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=7138, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 02:47:39,557 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 85 states, 85 states have (on average 1.011764705882353) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:43,429 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-02-24 02:47:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 02:47:43,429 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.011764705882353) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-02-24 02:47:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:43,430 INFO L225 Difference]: With dead ends: 98 [2022-02-24 02:47:43,430 INFO L226 Difference]: Without dead ends: 93 [2022-02-24 02:47:43,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3405 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=496, Invalid=26894, Unknown=0, NotChecked=0, Total=27390 [2022-02-24 02:47:43,432 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 7052 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 7133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 7052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:43,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 423 Invalid, 7133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 7052 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 02:47:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-24 02:47:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-24 02:47:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-02-24 02:47:43,442 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2022-02-24 02:47:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:43,443 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-02-24 02:47:43,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.011764705882353) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-02-24 02:47:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 02:47:43,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:43,443 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:43,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 02:47:43,443 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:43,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:43,445 INFO L85 PathProgramCache]: Analyzing trace with hash 663139174, now seen corresponding path program 40 times [2022-02-24 02:47:43,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:43,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490793244] [2022-02-24 02:47:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:43,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:43,558 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:43,667 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:43,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:46,736 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:46,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490793244] [2022-02-24 02:47:46,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1490793244] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:46,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:46,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 02:47:46,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108305138] [2022-02-24 02:47:46,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:46,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 02:47:46,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:46,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 02:47:46,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=7480, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 02:47:46,738 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 87 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:51,584 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-02-24 02:47:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-24 02:47:51,584 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-24 02:47:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:51,585 INFO L225 Difference]: With dead ends: 100 [2022-02-24 02:47:51,585 INFO L226 Difference]: Without dead ends: 95 [2022-02-24 02:47:51,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=508, Invalid=28222, Unknown=0, NotChecked=0, Total=28730 [2022-02-24 02:47:51,587 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 7307 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 7390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 7307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:51,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 428 Invalid, 7390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 7307 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 02:47:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-24 02:47:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-02-24 02:47:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-02-24 02:47:51,592 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2022-02-24 02:47:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:51,592 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-02-24 02:47:51,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-02-24 02:47:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 02:47:51,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:51,592 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:51,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 02:47:51,592 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1541833020, now seen corresponding path program 41 times [2022-02-24 02:47:51,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:51,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134014420] [2022-02-24 02:47:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:51,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:51,729 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:51,822 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:51,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:54,417 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:54,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134014420] [2022-02-24 02:47:54,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1134014420] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:54,418 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:54,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-24 02:47:54,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981068452] [2022-02-24 02:47:54,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:54,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-24 02:47:54,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:54,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-24 02:47:54,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=7656, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 02:47:54,421 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 89 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:59,346 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-02-24 02:47:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 02:47:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-02-24 02:47:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:59,347 INFO L225 Difference]: With dead ends: 102 [2022-02-24 02:47:59,347 INFO L226 Difference]: Without dead ends: 97 [2022-02-24 02:47:59,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3653 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=514, Invalid=29242, Unknown=0, NotChecked=0, Total=29756 [2022-02-24 02:47:59,349 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 7740 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 7825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 7740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:59,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 443 Invalid, 7825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 7740 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 02:47:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-24 02:47:59,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-02-24 02:47:59,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-02-24 02:47:59,354 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2022-02-24 02:47:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:59,354 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-02-24 02:47:59,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-02-24 02:47:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 02:47:59,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:59,355 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:59,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 02:47:59,355 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1193732770, now seen corresponding path program 42 times [2022-02-24 02:47:59,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:59,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425321906] [2022-02-24 02:47:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:59,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:59,464 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:59,596 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:47:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:59,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:02,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:02,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425321906] [2022-02-24 02:48:02,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425321906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:02,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:02,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-24 02:48:02,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541616142] [2022-02-24 02:48:02,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:02,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-24 02:48:02,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:02,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-24 02:48:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=8188, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 02:48:02,577 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 91 states, 91 states have (on average 1.010989010989011) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:06,629 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-02-24 02:48:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-24 02:48:06,629 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.010989010989011) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-02-24 02:48:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:06,630 INFO L225 Difference]: With dead ends: 104 [2022-02-24 02:48:06,630 INFO L226 Difference]: Without dead ends: 99 [2022-02-24 02:48:06,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=532, Invalid=30974, Unknown=0, NotChecked=0, Total=31506 [2022-02-24 02:48:06,635 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 8096 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 8183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 8096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:06,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 453 Invalid, 8183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 8096 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 02:48:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-24 02:48:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-02-24 02:48:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-02-24 02:48:06,641 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2022-02-24 02:48:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:06,641 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-02-24 02:48:06,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.010989010989011) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-02-24 02:48:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-24 02:48:06,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:06,642 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:06,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 02:48:06,642 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1552471808, now seen corresponding path program 43 times [2022-02-24 02:48:06,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:06,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528451248] [2022-02-24 02:48:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:06,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:06,782 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:06,910 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:06,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:10,446 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:10,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528451248] [2022-02-24 02:48:10,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1528451248] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:10,447 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:10,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-24 02:48:10,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362374380] [2022-02-24 02:48:10,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:10,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-24 02:48:10,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:10,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-24 02:48:10,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=8554, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 02:48:10,448 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 93 states, 93 states have (on average 1.010752688172043) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:15,486 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-02-24 02:48:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-24 02:48:15,486 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.010752688172043) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-02-24 02:48:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:15,486 INFO L225 Difference]: With dead ends: 106 [2022-02-24 02:48:15,486 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 02:48:15,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=544, Invalid=32398, Unknown=0, NotChecked=0, Total=32942 [2022-02-24 02:48:15,489 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 8460 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 8549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 8460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:15,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 463 Invalid, 8549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 8460 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 02:48:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 02:48:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-24 02:48:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-02-24 02:48:15,494 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2022-02-24 02:48:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:15,494 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-02-24 02:48:15,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.010752688172043) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-02-24 02:48:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-24 02:48:15,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:15,495 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:15,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 02:48:15,495 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:15,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1591663650, now seen corresponding path program 44 times [2022-02-24 02:48:15,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:15,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92429368] [2022-02-24 02:48:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:15,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:15,611 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:15,681 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:15,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:18,625 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:18,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92429368] [2022-02-24 02:48:18,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [92429368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:18,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:18,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-02-24 02:48:18,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829026158] [2022-02-24 02:48:18,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:18,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-24 02:48:18,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:18,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-24 02:48:18,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=8928, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 02:48:18,627 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 95 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:23,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:23,293 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-02-24 02:48:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-24 02:48:23,294 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-02-24 02:48:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:23,294 INFO L225 Difference]: With dead ends: 108 [2022-02-24 02:48:23,294 INFO L226 Difference]: Without dead ends: 103 [2022-02-24 02:48:23,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4280 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=556, Invalid=33854, Unknown=0, NotChecked=0, Total=34410 [2022-02-24 02:48:23,301 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 8832 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 8923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 8832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:23,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 473 Invalid, 8923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 8832 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 02:48:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-24 02:48:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-02-24 02:48:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-02-24 02:48:23,306 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2022-02-24 02:48:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:23,306 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-02-24 02:48:23,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-02-24 02:48:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:48:23,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:23,307 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:23,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 02:48:23,307 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:23,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash 551137596, now seen corresponding path program 45 times [2022-02-24 02:48:23,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:23,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715435147] [2022-02-24 02:48:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:23,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:23,420 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:23,528 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:23,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:27,249 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:27,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715435147] [2022-02-24 02:48:27,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [715435147] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:27,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:27,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-24 02:48:27,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161988982] [2022-02-24 02:48:27,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:27,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-24 02:48:27,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-24 02:48:27,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=9310, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 02:48:27,251 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 97 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:32,523 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-02-24 02:48:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-24 02:48:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:48:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:32,524 INFO L225 Difference]: With dead ends: 110 [2022-02-24 02:48:32,524 INFO L226 Difference]: Without dead ends: 105 [2022-02-24 02:48:32,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4467 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=568, Invalid=35342, Unknown=0, NotChecked=0, Total=35910 [2022-02-24 02:48:32,526 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 9212 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 9305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 9212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:32,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 483 Invalid, 9305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 9212 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 02:48:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-24 02:48:32,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-02-24 02:48:32,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-02-24 02:48:32,533 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2022-02-24 02:48:32,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:32,533 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-02-24 02:48:32,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:32,533 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-02-24 02:48:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-24 02:48:32,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:32,534 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:32,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 02:48:32,534 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:32,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:32,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1801167078, now seen corresponding path program 46 times [2022-02-24 02:48:32,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:32,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81938237] [2022-02-24 02:48:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:32,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:32,669 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:32,801 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:32,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:36,696 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:36,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81938237] [2022-02-24 02:48:36,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [81938237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:36,696 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:36,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-24 02:48:36,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150639393] [2022-02-24 02:48:36,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:36,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-24 02:48:36,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:36,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-24 02:48:36,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=9700, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 02:48:36,697 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 99 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:42,604 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-02-24 02:48:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-24 02:48:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-02-24 02:48:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:42,605 INFO L225 Difference]: With dead ends: 112 [2022-02-24 02:48:42,605 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 02:48:42,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4658 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=580, Invalid=36862, Unknown=0, NotChecked=0, Total=37442 [2022-02-24 02:48:42,608 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 9600 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 9695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 9600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:42,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 9695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9600 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 02:48:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 02:48:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-02-24 02:48:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-02-24 02:48:42,613 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2022-02-24 02:48:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:42,613 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-02-24 02:48:42,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-02-24 02:48:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-24 02:48:42,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:42,613 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:42,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 02:48:42,614 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1081806200, now seen corresponding path program 47 times [2022-02-24 02:48:42,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:42,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190905837] [2022-02-24 02:48:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:42,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:42,711 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:42,799 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:47,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:47,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190905837] [2022-02-24 02:48:47,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [190905837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:47,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:47,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-24 02:48:47,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452001189] [2022-02-24 02:48:47,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:47,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-24 02:48:47,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-24 02:48:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=10098, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 02:48:47,012 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 101 states, 101 states have (on average 1.00990099009901) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:53,357 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-02-24 02:48:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-24 02:48:53,357 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.00990099009901) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-02-24 02:48:53,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:53,358 INFO L225 Difference]: With dead ends: 114 [2022-02-24 02:48:53,358 INFO L226 Difference]: Without dead ends: 109 [2022-02-24 02:48:53,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4853 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=592, Invalid=38414, Unknown=0, NotChecked=0, Total=39006 [2022-02-24 02:48:53,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 9897 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 9994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 9897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:53,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 498 Invalid, 9994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 9897 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 02:48:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-24 02:48:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-02-24 02:48:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-02-24 02:48:53,365 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2022-02-24 02:48:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:53,365 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-02-24 02:48:53,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.00990099009901) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-02-24 02:48:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-24 02:48:53,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:53,365 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:53,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 02:48:53,366 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:53,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:53,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1365220438, now seen corresponding path program 48 times [2022-02-24 02:48:53,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:53,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182722344] [2022-02-24 02:48:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:53,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:53,473 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:53,572 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:48:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:53,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:56,945 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:56,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182722344] [2022-02-24 02:48:56,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1182722344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:56,945 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:56,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-02-24 02:48:56,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917260353] [2022-02-24 02:48:56,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:56,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-24 02:48:56,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-24 02:48:56,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10504, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 02:48:56,947 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 103 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 101 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:03,971 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-02-24 02:49:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-24 02:49:03,971 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 101 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-02-24 02:49:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:03,972 INFO L225 Difference]: With dead ends: 116 [2022-02-24 02:49:03,972 INFO L226 Difference]: Without dead ends: 111 [2022-02-24 02:49:03,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5052 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=604, Invalid=39998, Unknown=0, NotChecked=0, Total=40602 [2022-02-24 02:49:03,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 10299 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 10398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 10299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:03,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 508 Invalid, 10398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 10299 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 02:49:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-24 02:49:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-02-24 02:49:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-02-24 02:49:03,979 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2022-02-24 02:49:03,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:03,979 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-02-24 02:49:03,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 101 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:03,979 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-02-24 02:49:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-24 02:49:03,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:03,980 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:03,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 02:49:03,980 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1151603788, now seen corresponding path program 49 times [2022-02-24 02:49:03,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:03,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179352418] [2022-02-24 02:49:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:03,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:04,117 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:04,212 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:04,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:07,789 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:07,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179352418] [2022-02-24 02:49:07,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [179352418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:07,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:07,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-24 02:49:07,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250932636] [2022-02-24 02:49:07,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:07,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-24 02:49:07,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:07,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-24 02:49:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 02:49:07,791 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 105 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 103 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:13,846 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-02-24 02:49:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-24 02:49:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 103 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-02-24 02:49:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:13,847 INFO L225 Difference]: With dead ends: 118 [2022-02-24 02:49:13,847 INFO L226 Difference]: Without dead ends: 113 [2022-02-24 02:49:13,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5149 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=610, Invalid=41210, Unknown=0, NotChecked=0, Total=41820 [2022-02-24 02:49:13,849 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 10812 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 10913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 10812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:13,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 523 Invalid, 10913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 10812 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 02:49:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-24 02:49:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-02-24 02:49:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-02-24 02:49:13,871 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2022-02-24 02:49:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:13,872 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-02-24 02:49:13,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 103 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-02-24 02:49:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-02-24 02:49:13,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:13,872 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:13,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 02:49:13,872 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:13,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1753097326, now seen corresponding path program 50 times [2022-02-24 02:49:13,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:13,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855095242] [2022-02-24 02:49:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:13,939 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:14,057 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:14,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:17,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:17,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855095242] [2022-02-24 02:49:17,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855095242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:17,347 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:17,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-24 02:49:17,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922700711] [2022-02-24 02:49:17,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:17,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-24 02:49:17,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:17,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-24 02:49:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=11340, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 02:49:17,349 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 107 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 105 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:22,732 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-02-24 02:49:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-24 02:49:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 105 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-02-24 02:49:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:22,734 INFO L225 Difference]: With dead ends: 120 [2022-02-24 02:49:22,734 INFO L226 Difference]: Without dead ends: 115 [2022-02-24 02:49:22,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=628, Invalid=43262, Unknown=0, NotChecked=0, Total=43890 [2022-02-24 02:49:22,736 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 11127 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 11230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 11127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:22,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 528 Invalid, 11230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 11127 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 02:49:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-24 02:49:22,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-02-24 02:49:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-02-24 02:49:22,756 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2022-02-24 02:49:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:22,757 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-02-24 02:49:22,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 105 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-02-24 02:49:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-24 02:49:22,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:22,762 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:22,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 02:49:22,762 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:22,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash 32197616, now seen corresponding path program 51 times [2022-02-24 02:49:22,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:22,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603620713] [2022-02-24 02:49:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:22,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:22,873 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:22,975 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:23,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:26,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:26,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603620713] [2022-02-24 02:49:26,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603620713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:26,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:26,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-02-24 02:49:26,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756686259] [2022-02-24 02:49:26,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:26,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-02-24 02:49:26,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:26,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-02-24 02:49:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=11770, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 02:49:26,381 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 109 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:32,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:32,082 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-02-24 02:49:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-24 02:49:32,086 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-02-24 02:49:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:32,087 INFO L225 Difference]: With dead ends: 122 [2022-02-24 02:49:32,087 INFO L226 Difference]: Without dead ends: 117 [2022-02-24 02:49:32,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5673 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=640, Invalid=44942, Unknown=0, NotChecked=0, Total=45582 [2022-02-24 02:49:32,094 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 11660 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 11765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 11660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:32,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 543 Invalid, 11765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 11660 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 02:49:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-02-24 02:49:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-02-24 02:49:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-02-24 02:49:32,124 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2022-02-24 02:49:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:32,125 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-02-24 02:49:32,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-02-24 02:49:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-24 02:49:32,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:32,125 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:32,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 02:49:32,125 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2008685774, now seen corresponding path program 52 times [2022-02-24 02:49:32,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:32,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345958815] [2022-02-24 02:49:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:32,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:32,229 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:32,327 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:32,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:35,985 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:35,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345958815] [2022-02-24 02:49:35,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [345958815] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:35,985 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:35,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-24 02:49:35,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314644855] [2022-02-24 02:49:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:36,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-24 02:49:36,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:36,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-24 02:49:36,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=11990, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 02:49:36,003 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 111 states, 111 states have (on average 1.009009009009009) internal successors, (112), 109 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:42,450 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-02-24 02:49:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-24 02:49:42,450 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.009009009009009) internal successors, (112), 109 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-02-24 02:49:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:42,463 INFO L225 Difference]: With dead ends: 124 [2022-02-24 02:49:42,463 INFO L226 Difference]: Without dead ends: 119 [2022-02-24 02:49:42,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5776 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=646, Invalid=46226, Unknown=0, NotChecked=0, Total=46872 [2022-02-24 02:49:42,466 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 11987 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 12094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 11987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:42,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 548 Invalid, 12094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 11987 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 02:49:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-24 02:49:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-02-24 02:49:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-02-24 02:49:42,477 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2022-02-24 02:49:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:42,477 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-02-24 02:49:42,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.009009009009009) internal successors, (112), 109 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-02-24 02:49:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-24 02:49:42,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:42,478 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:42,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 02:49:42,478 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1256706516, now seen corresponding path program 53 times [2022-02-24 02:49:42,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:42,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112117394] [2022-02-24 02:49:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:42,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:42,599 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:42,696 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:42,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:46,333 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:46,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112117394] [2022-02-24 02:49:46,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112117394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:46,335 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:46,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-24 02:49:46,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643938055] [2022-02-24 02:49:46,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:46,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-24 02:49:46,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-24 02:49:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=12654, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 02:49:46,337 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 113 states, 113 states have (on average 1.008849557522124) internal successors, (114), 111 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:53,114 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-02-24 02:49:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-24 02:49:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.008849557522124) internal successors, (114), 111 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-02-24 02:49:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:53,115 INFO L225 Difference]: With dead ends: 126 [2022-02-24 02:49:53,115 INFO L226 Difference]: Without dead ends: 121 [2022-02-24 02:49:53,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6107 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=664, Invalid=48398, Unknown=0, NotChecked=0, Total=49062 [2022-02-24 02:49:53,117 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 12429 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 12538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 12429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:53,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 558 Invalid, 12538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 12429 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 02:49:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-24 02:49:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-02-24 02:49:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2022-02-24 02:49:53,123 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2022-02-24 02:49:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:53,123 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2022-02-24 02:49:53,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.008849557522124) internal successors, (114), 111 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2022-02-24 02:49:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-24 02:49:53,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:53,124 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:53,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 02:49:53,124 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash 322396170, now seen corresponding path program 54 times [2022-02-24 02:49:53,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:53,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522578673] [2022-02-24 02:49:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:53,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:53,240 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:53,343 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:49:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:53,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:57,558 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:57,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522578673] [2022-02-24 02:49:57,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522578673] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:57,558 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:57,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-02-24 02:49:57,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331537421] [2022-02-24 02:49:57,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:57,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-24 02:49:57,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-24 02:49:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=13108, Unknown=0, NotChecked=0, Total=13340 [2022-02-24 02:49:57,560 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 115 states, 115 states have (on average 1.008695652173913) internal successors, (116), 113 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:05,746 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-02-24 02:50:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-24 02:50:05,746 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.008695652173913) internal successors, (116), 113 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-02-24 02:50:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:05,750 INFO L225 Difference]: With dead ends: 128 [2022-02-24 02:50:05,750 INFO L226 Difference]: Without dead ends: 123 [2022-02-24 02:50:05,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6330 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=676, Invalid=50174, Unknown=0, NotChecked=0, Total=50850 [2022-02-24 02:50:05,752 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 12879 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 12990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 12879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:05,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 568 Invalid, 12990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 12879 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 02:50:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-24 02:50:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-02-24 02:50:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-02-24 02:50:05,759 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2022-02-24 02:50:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:05,759 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-02-24 02:50:05,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.008695652173913) internal successors, (116), 113 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-02-24 02:50:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-24 02:50:05,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:05,760 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:05,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 02:50:05,760 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:05,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1716621928, now seen corresponding path program 55 times [2022-02-24 02:50:05,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:05,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427761163] [2022-02-24 02:50:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:05,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:05,878 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:05,987 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:06,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:10,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:10,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427761163] [2022-02-24 02:50:10,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427761163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:10,125 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:10,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-24 02:50:10,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715243255] [2022-02-24 02:50:10,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:10,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-24 02:50:10,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:10,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-24 02:50:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=13570, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 02:50:10,127 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 117 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 115 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:16,721 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-02-24 02:50:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-24 02:50:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 115 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-02-24 02:50:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:16,722 INFO L225 Difference]: With dead ends: 130 [2022-02-24 02:50:16,722 INFO L226 Difference]: Without dead ends: 125 [2022-02-24 02:50:16,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6557 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=688, Invalid=51982, Unknown=0, NotChecked=0, Total=52670 [2022-02-24 02:50:16,724 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 13337 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 13450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 13337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:16,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 578 Invalid, 13450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 13337 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 02:50:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-24 02:50:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-02-24 02:50:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2022-02-24 02:50:16,744 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2022-02-24 02:50:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:16,744 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2022-02-24 02:50:16,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 115 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2022-02-24 02:50:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-24 02:50:16,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:16,745 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:16,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 02:50:16,745 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1537779014, now seen corresponding path program 56 times [2022-02-24 02:50:16,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:16,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908879761] [2022-02-24 02:50:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:16,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:16,856 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:16,962 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:17,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:22,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:22,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908879761] [2022-02-24 02:50:22,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [908879761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:22,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:22,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-24 02:50:22,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044995529] [2022-02-24 02:50:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:22,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-24 02:50:22,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:22,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-24 02:50:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=14040, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 02:50:22,579 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 119 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 117 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:29,898 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-02-24 02:50:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-24 02:50:29,899 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 117 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-02-24 02:50:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:29,900 INFO L225 Difference]: With dead ends: 132 [2022-02-24 02:50:29,900 INFO L226 Difference]: Without dead ends: 127 [2022-02-24 02:50:29,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6788 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=700, Invalid=53822, Unknown=0, NotChecked=0, Total=54522 [2022-02-24 02:50:29,905 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 13803 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 13918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 13803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:29,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 588 Invalid, 13918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 13803 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 02:50:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-24 02:50:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-02-24 02:50:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2022-02-24 02:50:29,911 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2022-02-24 02:50:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:29,911 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2022-02-24 02:50:29,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 117 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2022-02-24 02:50:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-24 02:50:29,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:29,912 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:29,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 02:50:29,912 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1468430500, now seen corresponding path program 57 times [2022-02-24 02:50:29,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:29,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216197011] [2022-02-24 02:50:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:30,022 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:30,125 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:30,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:34,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:34,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216197011] [2022-02-24 02:50:34,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216197011] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:34,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:34,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-02-24 02:50:34,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350130444] [2022-02-24 02:50:34,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:34,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-24 02:50:34,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-24 02:50:34,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=14518, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 02:50:34,396 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 121 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 119 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:42,467 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-02-24 02:50:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-24 02:50:42,467 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 119 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-02-24 02:50:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:42,468 INFO L225 Difference]: With dead ends: 134 [2022-02-24 02:50:42,468 INFO L226 Difference]: Without dead ends: 129 [2022-02-24 02:50:42,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7023 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=712, Invalid=55694, Unknown=0, NotChecked=0, Total=56406 [2022-02-24 02:50:42,470 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 14277 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 14394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 14277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:42,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 598 Invalid, 14394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 14277 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-24 02:50:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-24 02:50:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-02-24 02:50:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-02-24 02:50:42,476 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2022-02-24 02:50:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:42,476 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-02-24 02:50:42,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 119 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-02-24 02:50:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-24 02:50:42,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:42,477 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:42,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 02:50:42,477 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:42,477 INFO L85 PathProgramCache]: Analyzing trace with hash -750982014, now seen corresponding path program 58 times [2022-02-24 02:50:42,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:42,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377085731] [2022-02-24 02:50:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:42,593 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:42,661 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:42,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:47,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:47,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377085731] [2022-02-24 02:50:47,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377085731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:47,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:47,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-02-24 02:50:47,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660195197] [2022-02-24 02:50:47,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:47,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-02-24 02:50:47,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:47,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-02-24 02:50:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=14762, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 02:50:47,968 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 123 states, 123 states have (on average 1.008130081300813) internal successors, (124), 121 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:57,704 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-02-24 02:50:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-24 02:50:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.008130081300813) internal successors, (124), 121 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-02-24 02:50:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:57,705 INFO L225 Difference]: With dead ends: 136 [2022-02-24 02:50:57,706 INFO L226 Difference]: Without dead ends: 131 [2022-02-24 02:50:57,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7138 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=718, Invalid=57122, Unknown=0, NotChecked=0, Total=57840 [2022-02-24 02:50:57,709 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 14880 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 14999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 14880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:57,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 613 Invalid, 14999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 14880 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-24 02:50:57,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-24 02:50:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-02-24 02:50:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2022-02-24 02:50:57,715 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2022-02-24 02:50:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:57,715 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2022-02-24 02:50:57,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.008130081300813) internal successors, (124), 121 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2022-02-24 02:50:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-02-24 02:50:57,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:57,715 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:57,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 02:50:57,716 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:57,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:57,716 INFO L85 PathProgramCache]: Analyzing trace with hash 992338144, now seen corresponding path program 59 times [2022-02-24 02:50:57,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:57,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313703633] [2022-02-24 02:50:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:57,833 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:57,939 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:50:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:57,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:03,110 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:03,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313703633] [2022-02-24 02:51:03,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313703633] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:03,110 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:03,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-02-24 02:51:03,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112647286] [2022-02-24 02:51:03,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:03,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-02-24 02:51:03,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:03,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-02-24 02:51:03,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=15252, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 02:51:03,112 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 125 states, 125 states have (on average 1.008) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:11,871 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-02-24 02:51:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-24 02:51:11,872 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.008) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-02-24 02:51:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:11,872 INFO L225 Difference]: With dead ends: 138 [2022-02-24 02:51:11,872 INFO L226 Difference]: Without dead ends: 133 [2022-02-24 02:51:11,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7379 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=730, Invalid=59050, Unknown=0, NotChecked=0, Total=59780 [2022-02-24 02:51:11,875 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 15249 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 15370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 15249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:11,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 618 Invalid, 15370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 15249 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 02:51:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-24 02:51:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-02-24 02:51:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-02-24 02:51:11,881 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2022-02-24 02:51:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:11,881 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-02-24 02:51:11,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.008) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-02-24 02:51:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-24 02:51:11,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:11,881 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:11,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 02:51:11,882 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:11,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1285764542, now seen corresponding path program 60 times [2022-02-24 02:51:11,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:11,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921419568] [2022-02-24 02:51:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:11,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:11,994 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:51:12,105 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:51:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:12,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:17,590 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:17,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921419568] [2022-02-24 02:51:17,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [921419568] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:17,590 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:17,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-02-24 02:51:17,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218971677] [2022-02-24 02:51:17,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:17,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-02-24 02:51:17,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-02-24 02:51:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=15750, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 02:51:17,592 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 127 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 125 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:26,577 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-02-24 02:51:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-02-24 02:51:26,578 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 125 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-02-24 02:51:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:26,578 INFO L225 Difference]: With dead ends: 140 [2022-02-24 02:51:26,578 INFO L226 Difference]: Without dead ends: 135 [2022-02-24 02:51:26,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7624 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=742, Invalid=61010, Unknown=0, NotChecked=0, Total=61752 [2022-02-24 02:51:26,580 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 15747 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 15870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 15747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:26,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 628 Invalid, 15870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 15747 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 02:51:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-24 02:51:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-02-24 02:51:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2022-02-24 02:51:26,586 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2022-02-24 02:51:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:26,586 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2022-02-24 02:51:26,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 125 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2022-02-24 02:51:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-24 02:51:26,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:26,587 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:26,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 02:51:26,587 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:26,587 INFO L85 PathProgramCache]: Analyzing trace with hash -199308516, now seen corresponding path program 61 times [2022-02-24 02:51:26,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:26,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277942748] [2022-02-24 02:51:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:26,655 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:51:26,760 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:51:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:26,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:32,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:32,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277942748] [2022-02-24 02:51:32,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [277942748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:32,802 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:32,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-02-24 02:51:32,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469140070] [2022-02-24 02:51:32,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:32,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-02-24 02:51:32,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:32,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-02-24 02:51:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=16256, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 02:51:32,804 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 129 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 127 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:42,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:42,186 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-02-24 02:51:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-24 02:51:42,187 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 127 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-24 02:51:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:42,187 INFO L225 Difference]: With dead ends: 142 [2022-02-24 02:51:42,187 INFO L226 Difference]: Without dead ends: 137 [2022-02-24 02:51:42,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7873 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=754, Invalid=63002, Unknown=0, NotChecked=0, Total=63756 [2022-02-24 02:51:42,190 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 16380 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 16505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 16380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:42,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 643 Invalid, 16505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 16380 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-24 02:51:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-24 02:51:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-02-24 02:51:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2022-02-24 02:51:42,196 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2022-02-24 02:51:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:42,196 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2022-02-24 02:51:42,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 127 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2022-02-24 02:51:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-02-24 02:51:42,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:42,197 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:42,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 02:51:42,197 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:42,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1425374982, now seen corresponding path program 62 times [2022-02-24 02:51:42,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:42,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212245541] [2022-02-24 02:51:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:42,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:42,329 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:51:42,460 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:51:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:42,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:47,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:47,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212245541] [2022-02-24 02:51:47,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [212245541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:47,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:47,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-02-24 02:51:47,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895136135] [2022-02-24 02:51:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:47,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-02-24 02:51:47,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-02-24 02:51:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=16770, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 02:51:47,903 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 131 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 129 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:57,900 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-02-24 02:51:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-24 02:51:57,900 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 129 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-02-24 02:51:57,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:57,901 INFO L225 Difference]: With dead ends: 144 [2022-02-24 02:51:57,901 INFO L226 Difference]: Without dead ends: 139 [2022-02-24 02:51:57,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8126 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=766, Invalid=65026, Unknown=0, NotChecked=0, Total=65792 [2022-02-24 02:51:57,904 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 16896 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 17023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 16896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:57,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 653 Invalid, 17023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 16896 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-24 02:51:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-24 02:51:57,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-02-24 02:51:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-02-24 02:51:57,910 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2022-02-24 02:51:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:57,910 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-02-24 02:51:57,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 129 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-02-24 02:51:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-24 02:51:57,910 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:57,910 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:57,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 02:51:57,911 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:57,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1440757592, now seen corresponding path program 63 times [2022-02-24 02:51:57,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:57,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499078178] [2022-02-24 02:51:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:57,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:58,034 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:51:58,114 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:51:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:58,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:03,454 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:03,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499078178] [2022-02-24 02:52:03,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499078178] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:03,455 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:03,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-24 02:52:03,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310948244] [2022-02-24 02:52:03,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:03,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-24 02:52:03,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-24 02:52:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=17691, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 02:52:03,456 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 134 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 132 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:13,440 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-02-24 02:52:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-24 02:52:13,440 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 132 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-02-24 02:52:13,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:13,441 INFO L225 Difference]: With dead ends: 146 [2022-02-24 02:52:13,441 INFO L226 Difference]: Without dead ends: 141 [2022-02-24 02:52:13,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9293 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1060, Invalid=69430, Unknown=0, NotChecked=0, Total=70490 [2022-02-24 02:52:13,443 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 17422 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 17553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 17422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:13,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 662 Invalid, 17553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 17422 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 02:52:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-24 02:52:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-02-24 02:52:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2022-02-24 02:52:13,458 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2022-02-24 02:52:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:13,459 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2022-02-24 02:52:13,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 132 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2022-02-24 02:52:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-24 02:52:13,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:13,459 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:13,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 02:52:13,460 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1574842826, now seen corresponding path program 64 times [2022-02-24 02:52:13,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:13,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526268180] [2022-02-24 02:52:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:13,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:13,538 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:52:13,672 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:52:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:13,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:20,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:20,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526268180] [2022-02-24 02:52:20,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [526268180] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:20,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:20,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-02-24 02:52:20,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567916396] [2022-02-24 02:52:20,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:20,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-02-24 02:52:20,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-02-24 02:52:20,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=18088, Unknown=0, NotChecked=0, Total=18360 [2022-02-24 02:52:20,832 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 135 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 133 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:31,134 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-02-24 02:52:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-02-24 02:52:31,135 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 133 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-02-24 02:52:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:31,135 INFO L225 Difference]: With dead ends: 148 [2022-02-24 02:52:31,135 INFO L226 Difference]: Without dead ends: 143 [2022-02-24 02:52:31,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8780 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=796, Invalid=69694, Unknown=0, NotChecked=0, Total=70490 [2022-02-24 02:52:31,141 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 17952 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 18083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 17952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:31,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 673 Invalid, 18083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 17952 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 02:52:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-24 02:52:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-02-24 02:52:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-02-24 02:52:31,147 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2022-02-24 02:52:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:31,148 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-02-24 02:52:31,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 133 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-02-24 02:52:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-02-24 02:52:31,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:31,148 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:31,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 02:52:31,149 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash -463919724, now seen corresponding path program 65 times [2022-02-24 02:52:31,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:31,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248452934] [2022-02-24 02:52:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:31,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:31,285 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:52:31,422 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:52:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:31,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:38,893 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:38,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248452934] [2022-02-24 02:52:38,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [248452934] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:38,893 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:38,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-02-24 02:52:38,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974523709] [2022-02-24 02:52:38,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:38,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-02-24 02:52:38,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-02-24 02:52:38,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=18360, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 02:52:38,895 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 137 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 135 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:49,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:49,850 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-02-24 02:52:49,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-02-24 02:52:49,850 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 135 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-02-24 02:52:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:49,851 INFO L225 Difference]: With dead ends: 150 [2022-02-24 02:52:49,851 INFO L226 Difference]: Without dead ends: 145 [2022-02-24 02:52:49,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8909 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=802, Invalid=71290, Unknown=0, NotChecked=0, Total=72092 [2022-02-24 02:52:49,854 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 18492 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 18625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 18492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:49,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 683 Invalid, 18625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 18492 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 02:52:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-24 02:52:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-02-24 02:52:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2022-02-24 02:52:49,860 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2022-02-24 02:52:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:49,860 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2022-02-24 02:52:49,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 135 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2022-02-24 02:52:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-24 02:52:49,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:49,861 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:49,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 02:52:49,861 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1981291890, now seen corresponding path program 66 times [2022-02-24 02:52:49,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:49,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893500101] [2022-02-24 02:52:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:49,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:49,951 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:52:50,039 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:52:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:50,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:57,641 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:57,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893500101] [2022-02-24 02:52:57,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [893500101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:57,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:57,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-02-24 02:52:57,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10981711] [2022-02-24 02:52:57,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:57,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-02-24 02:52:57,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:57,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-02-24 02:52:57,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=19180, Unknown=0, NotChecked=0, Total=19460 [2022-02-24 02:52:57,644 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 139 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 137 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:07,442 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-02-24 02:53:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-24 02:53:07,442 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 137 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-02-24 02:53:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:07,443 INFO L225 Difference]: With dead ends: 152 [2022-02-24 02:53:07,443 INFO L226 Difference]: Without dead ends: 147 [2022-02-24 02:53:07,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9318 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=820, Invalid=73982, Unknown=0, NotChecked=0, Total=74802 [2022-02-24 02:53:07,446 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 19040 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 19175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 19040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:07,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 693 Invalid, 19175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 19040 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-24 02:53:07,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-02-24 02:53:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-02-24 02:53:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:07,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2022-02-24 02:53:07,453 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2022-02-24 02:53:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:07,453 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2022-02-24 02:53:07,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 137 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2022-02-24 02:53:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-24 02:53:07,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:07,454 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:07,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 02:53:07,454 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:07,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1812425264, now seen corresponding path program 67 times [2022-02-24 02:53:07,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:07,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118448125] [2022-02-24 02:53:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:07,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:07,604 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:53:07,746 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:53:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:07,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:15,325 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:15,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118448125] [2022-02-24 02:53:15,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118448125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:15,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:15,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-02-24 02:53:15,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683288072] [2022-02-24 02:53:15,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:15,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-02-24 02:53:15,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-02-24 02:53:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=19738, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 02:53:15,327 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 141 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 139 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:25,488 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2022-02-24 02:53:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-02-24 02:53:25,490 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 139 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-02-24 02:53:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:25,491 INFO L225 Difference]: With dead ends: 154 [2022-02-24 02:53:25,491 INFO L226 Difference]: Without dead ends: 149 [2022-02-24 02:53:25,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9593 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=832, Invalid=76174, Unknown=0, NotChecked=0, Total=77006 [2022-02-24 02:53:25,494 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 19457 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 19594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 19457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:25,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 698 Invalid, 19594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 19457 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 02:53:25,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-24 02:53:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-02-24 02:53:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2022-02-24 02:53:25,500 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2022-02-24 02:53:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:25,500 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2022-02-24 02:53:25,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 139 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2022-02-24 02:53:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-02-24 02:53:25,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:25,501 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:25,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 02:53:25,501 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1147375954, now seen corresponding path program 68 times [2022-02-24 02:53:25,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:25,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329051525] [2022-02-24 02:53:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:25,653 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:53:25,781 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:53:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:25,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:32,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:32,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329051525] [2022-02-24 02:53:32,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [329051525] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:32,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:32,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-02-24 02:53:32,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184739031] [2022-02-24 02:53:32,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:32,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-02-24 02:53:32,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:32,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-02-24 02:53:32,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=20304, Unknown=0, NotChecked=0, Total=20592 [2022-02-24 02:53:32,819 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 143 states, 143 states have (on average 1.006993006993007) internal successors, (144), 141 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:44,272 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2022-02-24 02:53:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-24 02:53:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.006993006993007) internal successors, (144), 141 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-02-24 02:53:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:44,273 INFO L225 Difference]: With dead ends: 156 [2022-02-24 02:53:44,273 INFO L226 Difference]: Without dead ends: 151 [2022-02-24 02:53:44,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9872 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=844, Invalid=78398, Unknown=0, NotChecked=0, Total=79242 [2022-02-24 02:53:44,275 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 20160 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 20299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 20160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:44,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 713 Invalid, 20299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 20160 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 02:53:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-24 02:53:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-02-24 02:53:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2022-02-24 02:53:44,282 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2022-02-24 02:53:44,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:44,282 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2022-02-24 02:53:44,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.006993006993007) internal successors, (144), 141 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:44,282 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2022-02-24 02:53:44,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-02-24 02:53:44,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:44,283 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:44,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 02:53:44,283 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:44,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1985116148, now seen corresponding path program 69 times [2022-02-24 02:53:44,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:44,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014089454] [2022-02-24 02:53:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:44,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:44,390 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:53:44,489 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:53:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:44,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:51,158 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:51,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014089454] [2022-02-24 02:53:51,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014089454] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:51,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:51,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-02-24 02:53:51,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192169850] [2022-02-24 02:53:51,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:51,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-02-24 02:53:51,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-02-24 02:53:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=20878, Unknown=0, NotChecked=0, Total=21170 [2022-02-24 02:53:51,160 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 145 states, 145 states have (on average 1.006896551724138) internal successors, (146), 143 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:02,787 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2022-02-24 02:54:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-24 02:54:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.006896551724138) internal successors, (146), 143 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-02-24 02:54:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:02,789 INFO L225 Difference]: With dead ends: 158 [2022-02-24 02:54:02,789 INFO L226 Difference]: Without dead ends: 153 [2022-02-24 02:54:02,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10155 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=856, Invalid=80654, Unknown=0, NotChecked=0, Total=81510 [2022-02-24 02:54:02,791 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 20732 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 20873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 20732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:02,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 723 Invalid, 20873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 20732 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-24 02:54:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-24 02:54:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-02-24 02:54:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2022-02-24 02:54:02,798 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2022-02-24 02:54:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:02,798 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2022-02-24 02:54:02,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.006896551724138) internal successors, (146), 143 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2022-02-24 02:54:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-24 02:54:02,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:02,799 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:02,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 02:54:02,799 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash 400409066, now seen corresponding path program 70 times [2022-02-24 02:54:02,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:02,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283096247] [2022-02-24 02:54:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:02,947 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:54:03,087 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:54:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:03,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:10,752 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:10,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283096247] [2022-02-24 02:54:10,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283096247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:10,753 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:10,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-02-24 02:54:10,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069429659] [2022-02-24 02:54:10,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:10,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-02-24 02:54:10,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-02-24 02:54:10,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=21170, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 02:54:10,755 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 147 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 145 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:23,702 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-02-24 02:54:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-24 02:54:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 145 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-02-24 02:54:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:23,703 INFO L225 Difference]: With dead ends: 160 [2022-02-24 02:54:23,703 INFO L226 Difference]: Without dead ends: 155 [2022-02-24 02:54:23,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10294 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=862, Invalid=82370, Unknown=0, NotChecked=0, Total=83232 [2022-02-24 02:54:23,706 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 21167 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 21310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 21167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:23,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 728 Invalid, 21310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 21167 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-24 02:54:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-24 02:54:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-02-24 02:54:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2022-02-24 02:54:23,713 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2022-02-24 02:54:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:23,713 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2022-02-24 02:54:23,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 145 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2022-02-24 02:54:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-02-24 02:54:23,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:23,714 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:23,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 02:54:23,714 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash -622396344, now seen corresponding path program 71 times [2022-02-24 02:54:23,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:23,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455763278] [2022-02-24 02:54:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:23,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:23,874 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:54:23,979 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:54:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:24,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:31,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:31,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455763278] [2022-02-24 02:54:31,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1455763278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:31,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:31,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-02-24 02:54:31,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439186706] [2022-02-24 02:54:31,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:31,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-02-24 02:54:31,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:31,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-02-24 02:54:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=22050, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 02:54:31,553 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 149 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 147 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:44,613 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2022-02-24 02:54:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-02-24 02:54:44,614 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 147 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-02-24 02:54:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:44,615 INFO L225 Difference]: With dead ends: 162 [2022-02-24 02:54:44,615 INFO L226 Difference]: Without dead ends: 157 [2022-02-24 02:54:44,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10733 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=880, Invalid=85262, Unknown=0, NotChecked=0, Total=86142 [2022-02-24 02:54:44,620 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 21900 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 22045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 21900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:44,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 743 Invalid, 22045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 21900 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-02-24 02:54:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-24 02:54:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-02-24 02:54:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2022-02-24 02:54:44,627 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2022-02-24 02:54:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:44,627 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2022-02-24 02:54:44,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 147 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2022-02-24 02:54:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-02-24 02:54:44,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:44,628 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:44,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 02:54:44,628 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:44,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:44,628 INFO L85 PathProgramCache]: Analyzing trace with hash 9115430, now seen corresponding path program 72 times [2022-02-24 02:54:44,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:44,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325408890] [2022-02-24 02:54:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:44,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:44,728 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:54:44,865 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:54:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:44,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:53,205 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:53,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325408890] [2022-02-24 02:54:53,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325408890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:53,206 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:53,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-02-24 02:54:53,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916802688] [2022-02-24 02:54:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:53,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-02-24 02:54:53,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:53,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-02-24 02:54:53,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=22350, Unknown=0, NotChecked=0, Total=22650 [2022-02-24 02:54:53,208 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 151 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 149 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:07,951 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2022-02-24 02:55:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-24 02:55:07,952 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 149 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-02-24 02:55:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:07,952 INFO L225 Difference]: With dead ends: 164 [2022-02-24 02:55:07,952 INFO L226 Difference]: Without dead ends: 159 [2022-02-24 02:55:07,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10876 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=886, Invalid=87026, Unknown=0, NotChecked=0, Total=87912 [2022-02-24 02:55:07,956 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 22496 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 22643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 22496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:07,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 753 Invalid, 22643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 22496 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-02-24 02:55:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-24 02:55:07,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-02-24 02:55:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2022-02-24 02:55:07,963 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2022-02-24 02:55:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:07,963 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2022-02-24 02:55:07,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 149 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2022-02-24 02:55:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-24 02:55:07,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:07,964 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:55:07,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 02:55:07,964 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1301541508, now seen corresponding path program 73 times [2022-02-24 02:55:07,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:07,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207762160] [2022-02-24 02:55:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:07,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:08,127 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:55:08,281 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:55:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:08,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:55:17,449 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:17,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207762160] [2022-02-24 02:55:17,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [207762160] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:17,449 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:17,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-02-24 02:55:17,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130455447] [2022-02-24 02:55:17,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:17,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-02-24 02:55:17,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:17,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-02-24 02:55:17,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=22952, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 02:55:17,451 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 153 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 151 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:32,848 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2022-02-24 02:55:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-02-24 02:55:32,849 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 151 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-02-24 02:55:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:32,850 INFO L225 Difference]: With dead ends: 166 [2022-02-24 02:55:32,850 INFO L226 Difference]: Without dead ends: 161 [2022-02-24 02:55:32,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11173 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=898, Invalid=89402, Unknown=0, NotChecked=0, Total=90300 [2022-02-24 02:55:32,853 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 22949 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 23098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 22949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:32,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 758 Invalid, 23098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 22949 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-24 02:55:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-24 02:55:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-02-24 02:55:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2022-02-24 02:55:32,860 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2022-02-24 02:55:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:32,860 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2022-02-24 02:55:32,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 151 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2022-02-24 02:55:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-24 02:55:32,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:32,861 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:55:32,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 02:55:32,861 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:32,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2077453922, now seen corresponding path program 74 times [2022-02-24 02:55:32,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:32,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194755810] [2022-02-24 02:55:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:32,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:32,994 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:55:33,078 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:55:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:33,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:55:41,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:41,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194755810] [2022-02-24 02:55:41,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194755810] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:41,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:41,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-02-24 02:55:41,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376378415] [2022-02-24 02:55:41,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:41,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-02-24 02:55:41,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-02-24 02:55:41,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=23562, Unknown=0, NotChecked=0, Total=23870 [2022-02-24 02:55:41,948 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 155 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 153 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:55,989 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2022-02-24 02:55:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-24 02:55:55,989 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 153 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-02-24 02:55:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:55,990 INFO L225 Difference]: With dead ends: 168 [2022-02-24 02:55:55,990 INFO L226 Difference]: Without dead ends: 163 [2022-02-24 02:55:55,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11474 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=910, Invalid=91810, Unknown=0, NotChecked=0, Total=92720 [2022-02-24 02:55:55,994 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 23712 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 23863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 23712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:55,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 773 Invalid, 23863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 23712 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-02-24 02:55:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-02-24 02:55:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-02-24 02:55:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2022-02-24 02:55:56,001 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2022-02-24 02:55:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:56,001 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2022-02-24 02:55:56,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 153 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:56,001 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2022-02-24 02:55:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-02-24 02:55:56,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:56,002 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:55:56,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 02:55:56,002 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:56,002 INFO L85 PathProgramCache]: Analyzing trace with hash 404974272, now seen corresponding path program 75 times [2022-02-24 02:55:56,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:56,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14799408] [2022-02-24 02:55:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:56,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:56,116 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:55:56,275 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:55:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:56,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:06,449 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:06,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14799408] [2022-02-24 02:56:06,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [14799408] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:06,450 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:06,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-02-24 02:56:06,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687506799] [2022-02-24 02:56:06,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:06,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-02-24 02:56:06,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-02-24 02:56:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=24490, Unknown=0, NotChecked=0, Total=24806 [2022-02-24 02:56:06,452 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 157 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 155 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:22,278 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-02-24 02:56:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-02-24 02:56:22,279 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 155 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-02-24 02:56:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:22,279 INFO L225 Difference]: With dead ends: 170 [2022-02-24 02:56:22,279 INFO L226 Difference]: Without dead ends: 165 [2022-02-24 02:56:22,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11937 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=928, Invalid=94862, Unknown=0, NotChecked=0, Total=95790 [2022-02-24 02:56:22,284 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 24177 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 24330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 24177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:22,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 778 Invalid, 24330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 24177 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-24 02:56:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-24 02:56:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-02-24 02:56:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:22,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2022-02-24 02:56:22,295 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2022-02-24 02:56:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:22,296 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2022-02-24 02:56:22,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 155 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2022-02-24 02:56:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-02-24 02:56:22,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:22,310 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:56:22,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 02:56:22,310 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:22,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:22,310 INFO L85 PathProgramCache]: Analyzing trace with hash -530200674, now seen corresponding path program 76 times [2022-02-24 02:56:22,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:22,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434774224] [2022-02-24 02:56:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:22,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:22,443 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:56:22,556 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:56:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:22,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:31,158 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:31,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434774224] [2022-02-24 02:56:31,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [434774224] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:31,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:31,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-02-24 02:56:31,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874492507] [2022-02-24 02:56:31,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:31,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-02-24 02:56:31,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-02-24 02:56:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=25120, Unknown=0, NotChecked=0, Total=25440 [2022-02-24 02:56:31,160 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 159 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 157 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:46,173 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2022-02-24 02:56:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-02-24 02:56:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 157 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-02-24 02:56:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:46,174 INFO L225 Difference]: With dead ends: 172 [2022-02-24 02:56:46,174 INFO L226 Difference]: Without dead ends: 167 [2022-02-24 02:56:46,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12248 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=940, Invalid=97342, Unknown=0, NotChecked=0, Total=98282 [2022-02-24 02:56:46,178 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 24960 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 25115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 24960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:46,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 793 Invalid, 25115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 24960 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-02-24 02:56:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-24 02:56:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-02-24 02:56:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2022-02-24 02:56:46,220 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2022-02-24 02:56:46,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:46,220 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2022-02-24 02:56:46,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 157 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2022-02-24 02:56:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-02-24 02:56:46,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:46,221 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:56:46,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 02:56:46,221 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:46,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1585158916, now seen corresponding path program 77 times [2022-02-24 02:56:46,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:46,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069067127] [2022-02-24 02:56:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:46,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:46,392 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:56:46,551 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:56:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:46,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:57,225 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:57,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069067127] [2022-02-24 02:56:57,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1069067127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:57,225 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:57,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-02-24 02:56:57,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278566434] [2022-02-24 02:56:57,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:57,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-02-24 02:56:57,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-02-24 02:56:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=25440, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 02:56:57,228 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 161 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 159 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:13,483 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2022-02-24 02:57:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-24 02:57:13,484 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 159 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-02-24 02:57:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:13,484 INFO L225 Difference]: With dead ends: 174 [2022-02-24 02:57:13,484 INFO L226 Difference]: Without dead ends: 169 [2022-02-24 02:57:13,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12401 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=946, Invalid=99226, Unknown=0, NotChecked=0, Total=100172 [2022-02-24 02:57:13,487 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 25596 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 25753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 25596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:13,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 803 Invalid, 25753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 25596 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-02-24 02:57:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-02-24 02:57:13,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-02-24 02:57:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2022-02-24 02:57:13,495 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2022-02-24 02:57:13,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:13,495 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2022-02-24 02:57:13,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 159 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2022-02-24 02:57:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-24 02:57:13,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:13,495 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:57:13,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 02:57:13,496 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1787747622, now seen corresponding path program 78 times [2022-02-24 02:57:13,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:13,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611933036] [2022-02-24 02:57:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:13,627 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:57:13,762 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:57:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:13,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:57:22,889 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:22,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611933036] [2022-02-24 02:57:22,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [611933036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:22,890 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:22,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2022-02-24 02:57:22,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226575556] [2022-02-24 02:57:22,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:22,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-02-24 02:57:22,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:22,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-02-24 02:57:22,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=26404, Unknown=0, NotChecked=0, Total=26732 [2022-02-24 02:57:22,891 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 163 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 161 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:38,898 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2022-02-24 02:57:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-02-24 02:57:38,899 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 161 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-02-24 02:57:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:38,899 INFO L225 Difference]: With dead ends: 176 [2022-02-24 02:57:38,899 INFO L226 Difference]: Without dead ends: 171 [2022-02-24 02:57:38,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=964, Invalid=102398, Unknown=0, NotChecked=0, Total=103362 [2022-02-24 02:57:38,903 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 26240 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 26399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 26240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:38,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 813 Invalid, 26399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 26240 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-02-24 02:57:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-24 02:57:38,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-02-24 02:57:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2022-02-24 02:57:38,910 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2022-02-24 02:57:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:38,910 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2022-02-24 02:57:38,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 161 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2022-02-24 02:57:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-02-24 02:57:38,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:38,911 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:57:38,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 02:57:38,911 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1093001528, now seen corresponding path program 79 times [2022-02-24 02:57:38,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:38,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890221157] [2022-02-24 02:57:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:38,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:39,076 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:57:39,227 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:57:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:39,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:57:49,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:49,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890221157] [2022-02-24 02:57:49,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [890221157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:49,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:49,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-02-24 02:57:49,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266779168] [2022-02-24 02:57:49,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:49,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-02-24 02:57:49,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-02-24 02:57:49,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=27058, Unknown=0, NotChecked=0, Total=27390 [2022-02-24 02:57:49,698 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 165 states, 165 states have (on average 1.006060606060606) internal successors, (166), 163 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:58:07,614 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2022-02-24 02:58:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-02-24 02:58:07,614 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.006060606060606) internal successors, (166), 163 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-02-24 02:58:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:58:07,615 INFO L225 Difference]: With dead ends: 178 [2022-02-24 02:58:07,615 INFO L226 Difference]: Without dead ends: 173 [2022-02-24 02:58:07,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=976, Invalid=104974, Unknown=0, NotChecked=0, Total=105950 [2022-02-24 02:58:07,619 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 26729 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 26890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 26729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:58:07,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 818 Invalid, 26890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 26729 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-02-24 02:58:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-24 02:58:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-02-24 02:58:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2022-02-24 02:58:07,626 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2022-02-24 02:58:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:58:07,626 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2022-02-24 02:58:07,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.006060606060606) internal successors, (166), 163 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2022-02-24 02:58:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-02-24 02:58:07,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:58:07,627 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:58:07,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 02:58:07,627 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:58:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:58:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash -760971242, now seen corresponding path program 80 times [2022-02-24 02:58:07,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:58:07,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130538867] [2022-02-24 02:58:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:58:07,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:58:07,791 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:58:07,955 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:58:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:07,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:58:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:58:17,821 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:58:17,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130538867] [2022-02-24 02:58:17,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1130538867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:58:17,822 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:58:17,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-02-24 02:58:17,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684864392] [2022-02-24 02:58:17,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:58:17,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-02-24 02:58:17,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:58:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-02-24 02:58:17,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=27390, Unknown=0, NotChecked=0, Total=27722 [2022-02-24 02:58:17,824 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 167 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 165 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:58:34,274 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2022-02-24 02:58:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-02-24 02:58:34,275 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 165 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-02-24 02:58:34,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:58:34,276 INFO L225 Difference]: With dead ends: 180 [2022-02-24 02:58:34,276 INFO L226 Difference]: Without dead ends: 175 [2022-02-24 02:58:34,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13364 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=982, Invalid=106930, Unknown=0, NotChecked=0, Total=107912 [2022-02-24 02:58:34,280 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 27552 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 27715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 27552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:58:34,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 833 Invalid, 27715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 27552 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-24 02:58:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-24 02:58:34,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-02-24 02:58:34,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2022-02-24 02:58:34,306 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2022-02-24 02:58:34,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:58:34,306 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2022-02-24 02:58:34,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 165 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2022-02-24 02:58:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-02-24 02:58:34,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:58:34,307 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:58:34,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 02:58:34,308 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:58:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:58:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash -17375372, now seen corresponding path program 81 times [2022-02-24 02:58:34,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:58:34,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914100090] [2022-02-24 02:58:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:58:34,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:58:34,512 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:58:34,696 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:58:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:34,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:58:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:58:45,753 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:58:45,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914100090] [2022-02-24 02:58:45,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1914100090] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:58:45,753 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:58:45,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2022-02-24 02:58:45,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274307344] [2022-02-24 02:58:45,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:58:45,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-02-24 02:58:45,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:58:45,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-02-24 02:58:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=28390, Unknown=0, NotChecked=0, Total=28730 [2022-02-24 02:58:45,755 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand has 169 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 167 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:59:03,833 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2022-02-24 02:59:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-02-24 02:59:03,834 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 167 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-02-24 02:59:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:59:03,835 INFO L225 Difference]: With dead ends: 182 [2022-02-24 02:59:03,835 INFO L226 Difference]: Without dead ends: 177 [2022-02-24 02:59:03,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13863 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1000, Invalid=110222, Unknown=0, NotChecked=0, Total=111222 [2022-02-24 02:59:03,839 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 28053 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 28218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 28053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:59:03,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 838 Invalid, 28218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 28053 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-02-24 02:59:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-24 02:59:03,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-02-24 02:59:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2022-02-24 02:59:03,847 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2022-02-24 02:59:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:59:03,847 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2022-02-24 02:59:03,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 167 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2022-02-24 02:59:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-02-24 02:59:03,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:59:03,848 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:59:03,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 02:59:03,848 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:59:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:59:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1613684562, now seen corresponding path program 82 times [2022-02-24 02:59:03,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:59:03,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81730224] [2022-02-24 02:59:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:59:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:59:04,027 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:59:04,198 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:59:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:59:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:59:14,971 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:59:14,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81730224] [2022-02-24 02:59:14,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [81730224] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:59:14,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:59:14,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2022-02-24 02:59:14,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240357375] [2022-02-24 02:59:14,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:59:14,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-02-24 02:59:14,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:59:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-02-24 02:59:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=29068, Unknown=0, NotChecked=0, Total=29412 [2022-02-24 02:59:14,973 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand has 171 states, 171 states have (on average 1.0058479532163742) internal successors, (172), 169 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:59:32,844 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2022-02-24 02:59:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-02-24 02:59:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.0058479532163742) internal successors, (172), 169 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-02-24 02:59:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:59:32,845 INFO L225 Difference]: With dead ends: 184 [2022-02-24 02:59:32,845 INFO L226 Difference]: Without dead ends: 179 [2022-02-24 02:59:32,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14198 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1012, Invalid=112894, Unknown=0, NotChecked=0, Total=113906 [2022-02-24 02:59:32,849 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 28727 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 28894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 28727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:59:32,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 848 Invalid, 28894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 28727 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-24 02:59:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-24 02:59:32,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-02-24 02:59:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2022-02-24 02:59:32,856 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2022-02-24 02:59:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:59:32,857 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2022-02-24 02:59:32,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.0058479532163742) internal successors, (172), 169 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2022-02-24 02:59:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-02-24 02:59:32,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:59:32,857 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:59:32,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 02:59:32,858 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:59:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:59:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1399218096, now seen corresponding path program 83 times [2022-02-24 02:59:32,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:59:32,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911568821] [2022-02-24 02:59:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:59:32,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:59:33,002 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:59:33,162 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 02:59:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:59:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:59:44,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:59:44,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911568821] [2022-02-24 02:59:44,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911568821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:59:44,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:59:44,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [174] imperfect sequences [] total 174 [2022-02-24 02:59:44,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120204292] [2022-02-24 02:59:44,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:59:44,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-02-24 02:59:44,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:59:44,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-02-24 02:59:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=29931, Unknown=0, NotChecked=0, Total=30450 [2022-02-24 02:59:44,904 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 174 states, 173 states have (on average 1.0057803468208093) internal successors, (174), 172 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)