/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark34_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:02:12,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:02:12,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:02:12,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 04:02:12,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:02:12,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:02:12,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:02:12,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:02:12,225 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:02:12,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:02:12,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:02:12,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:02:12,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:02:12,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:02:12,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:02:12,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:02:12,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:02:12,229 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:02:12,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:02:12,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:02:12,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:02:12,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:02:12,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:02:12,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:02:12,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:02:12,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:02:12,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:02:12,231 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:02:12,231 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:02:12,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:02:12,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:02:12,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:02:12,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:02:12,510 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:02:12,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark34_conjunctive.i [2022-02-24 04:02:12,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383e0fc05/0537d49bd572406bb8fd60ea72031b8d/FLAGc1100e573 [2022-02-24 04:02:12,984 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:02:12,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark34_conjunctive.i [2022-02-24 04:02:12,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383e0fc05/0537d49bd572406bb8fd60ea72031b8d/FLAGc1100e573 [2022-02-24 04:02:13,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383e0fc05/0537d49bd572406bb8fd60ea72031b8d [2022-02-24 04:02:13,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:02:13,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:02:13,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:02:13,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:02:13,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:02:13,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54c3133b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13, skipping insertion in model container [2022-02-24 04:02:13,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:02:13,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:02:13,571 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark34_conjunctive.i[873,886] [2022-02-24 04:02:13,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:02:13,610 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:02:13,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark34_conjunctive.i[873,886] [2022-02-24 04:02:13,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:02:13,634 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:02:13,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13 WrapperNode [2022-02-24 04:02:13,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:02:13,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:02:13,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:02:13,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:02:13,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:02:13,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:02:13,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:02:13,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:02:13,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13" (1/1) ... [2022-02-24 04:02:13,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:02:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:02:13,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 04:02:13,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 04:02:13,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:02:13,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:02:13,748 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:02:13,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 04:02:13,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:02:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:02:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 04:02:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 04:02:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:02:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:02:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:02:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-02-24 04:02:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 04:02:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:02:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:02:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:02:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:02:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:02:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:02:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:02:13,808 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:02:13,809 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:02:13,902 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:02:13,907 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:02:13,907 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:02:13,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:02:13 BoogieIcfgContainer [2022-02-24 04:02:13,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:02:13,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:02:13,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:02:13,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:02:13,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:02:13" (1/3) ... [2022-02-24 04:02:13,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69951b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:02:13, skipping insertion in model container [2022-02-24 04:02:13,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:02:13" (2/3) ... [2022-02-24 04:02:13,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69951b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:02:13, skipping insertion in model container [2022-02-24 04:02:13,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:02:13" (3/3) ... [2022-02-24 04:02:13,916 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark34_conjunctive.i [2022-02-24 04:02:13,921 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:02:13,921 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:02:13,976 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:02:13,982 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 04:02:13,982 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:02:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 04:02:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 04:02:14,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:14,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:14,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:14,026 INFO L85 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2022-02-24 04:02:14,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:14,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608098882] [2022-02-24 04:02:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:14,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:14,087 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:02:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:14,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:14,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:14,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608098882] [2022-02-24 04:02:14,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [608098882] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:14,277 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:14,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:02:14,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558290760] [2022-02-24 04:02:14,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:14,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:02:14,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:02:14,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:02:14,337 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:14,430 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-02-24 04:02:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:02:14,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 04:02:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:14,437 INFO L225 Difference]: With dead ends: 33 [2022-02-24 04:02:14,437 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 04:02:14,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:02:14,448 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:14,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 04:02:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 04:02:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-24 04:02:14,488 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-02-24 04:02:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:14,489 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-24 04:02:14,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-24 04:02:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-24 04:02:14,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:14,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:14,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:02:14,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2022-02-24 04:02:14,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:14,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287006590] [2022-02-24 04:02:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:14,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:14,717 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:14,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:14,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:14,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287006590] [2022-02-24 04:02:14,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287006590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:14,953 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:14,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:02:14,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027854694] [2022-02-24 04:02:14,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:14,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:02:14,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:02:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:02:14,956 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:15,072 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-02-24 04:02:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:02:15,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-24 04:02:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:15,073 INFO L225 Difference]: With dead ends: 20 [2022-02-24 04:02:15,073 INFO L226 Difference]: Without dead ends: 15 [2022-02-24 04:02:15,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:02:15,079 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:15,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:02:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-24 04:02:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-24 04:02:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-02-24 04:02:15,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-02-24 04:02:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:15,083 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-02-24 04:02:15,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-02-24 04:02:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 04:02:15,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:15,084 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:15,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:02:15,084 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:15,085 INFO L85 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 2 times [2022-02-24 04:02:15,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:15,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435939807] [2022-02-24 04:02:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:15,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:15,246 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:15,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:15,439 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:15,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435939807] [2022-02-24 04:02:15,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [435939807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:15,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:15,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:02:15,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404103749] [2022-02-24 04:02:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:15,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:02:15,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:02:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:02:15,443 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:15,602 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-02-24 04:02:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:02:15,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 04:02:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:15,604 INFO L225 Difference]: With dead ends: 21 [2022-02-24 04:02:15,604 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 04:02:15,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:02:15,610 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:15,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 04:02:15,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-24 04:02:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:15,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-02-24 04:02:15,617 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2022-02-24 04:02:15,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:15,618 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-02-24 04:02:15,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:15,618 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-02-24 04:02:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 04:02:15,619 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:15,619 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:15,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:02:15,619 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash -955485626, now seen corresponding path program 3 times [2022-02-24 04:02:15,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:15,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271815338] [2022-02-24 04:02:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:15,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:30,137 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:30,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:30,334 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:30,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271815338] [2022-02-24 04:02:30,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [271815338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:30,334 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:30,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:02:30,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78666303] [2022-02-24 04:02:30,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:30,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:02:30,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:02:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:02:30,337 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:30,506 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-02-24 04:02:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:02:30,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 04:02:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:30,508 INFO L225 Difference]: With dead ends: 22 [2022-02-24 04:02:30,508 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 04:02:30,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:02:30,517 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:30,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 41 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 04:02:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 04:02:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-24 04:02:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-02-24 04:02:30,522 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2022-02-24 04:02:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:30,523 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-02-24 04:02:30,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-02-24 04:02:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 04:02:30,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:30,524 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:30,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:02:30,524 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash 480105496, now seen corresponding path program 4 times [2022-02-24 04:02:30,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:30,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542116775] [2022-02-24 04:02:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:30,703 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:30,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:30,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:30,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542116775] [2022-02-24 04:02:30,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1542116775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:30,893 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:30,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:02:30,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770679889] [2022-02-24 04:02:30,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:30,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:02:30,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:30,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:02:30,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:02:30,896 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:31,051 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-02-24 04:02:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:02:31,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 04:02:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:31,052 INFO L225 Difference]: With dead ends: 23 [2022-02-24 04:02:31,052 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 04:02:31,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:02:31,053 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:31,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 41 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 04:02:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-24 04:02:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-02-24 04:02:31,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-02-24 04:02:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:31,058 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-02-24 04:02:31,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-02-24 04:02:31,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 04:02:31,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:31,059 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:31,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:02:31,059 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2033757318, now seen corresponding path program 5 times [2022-02-24 04:02:31,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:31,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865402926] [2022-02-24 04:02:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:31,166 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:31,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:31,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:31,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865402926] [2022-02-24 04:02:31,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [865402926] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:31,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:31,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:02:31,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946776971] [2022-02-24 04:02:31,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:31,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:02:31,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:02:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:02:31,355 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:31,511 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-02-24 04:02:31,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:02:31,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 04:02:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:31,512 INFO L225 Difference]: With dead ends: 24 [2022-02-24 04:02:31,512 INFO L226 Difference]: Without dead ends: 19 [2022-02-24 04:02:31,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:02:31,513 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:31,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 46 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-24 04:02:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-24 04:02:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-02-24 04:02:31,517 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-02-24 04:02:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:31,518 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-02-24 04:02:31,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-02-24 04:02:31,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 04:02:31,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:31,519 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:31,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:02:31,519 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:31,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1342643752, now seen corresponding path program 6 times [2022-02-24 04:02:31,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:31,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909179519] [2022-02-24 04:02:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:31,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:31,681 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:31,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:31,744 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 04:02:31,916 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:31,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909179519] [2022-02-24 04:02:31,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909179519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:31,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:31,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:02:31,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476921198] [2022-02-24 04:02:31,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:31,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:02:31,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:02:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:02:31,918 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:32,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:32,089 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-02-24 04:02:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:02:32,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 04:02:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:32,091 INFO L225 Difference]: With dead ends: 25 [2022-02-24 04:02:32,092 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 04:02:32,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-24 04:02:32,093 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:32,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 04:02:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 04:02:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-02-24 04:02:32,100 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2022-02-24 04:02:32,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:32,100 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-02-24 04:02:32,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-24 04:02:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 04:02:32,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:32,102 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:32,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 04:02:32,102 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1363105478, now seen corresponding path program 7 times [2022-02-24 04:02:32,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:32,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886680406] [2022-02-24 04:02:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:32,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:32,271 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:32,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:32,494 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:32,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886680406] [2022-02-24 04:02:32,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1886680406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:32,495 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:32,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:02:32,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904822905] [2022-02-24 04:02:32,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:32,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:02:32,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:32,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:02:32,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:02:32,496 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:32,696 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-02-24 04:02:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:02:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 04:02:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:32,700 INFO L225 Difference]: With dead ends: 26 [2022-02-24 04:02:32,700 INFO L226 Difference]: Without dead ends: 21 [2022-02-24 04:02:32,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-24 04:02:32,701 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:32,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-24 04:02:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-02-24 04:02:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-02-24 04:02:32,706 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2022-02-24 04:02:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:32,707 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-02-24 04:02:32,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-02-24 04:02:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 04:02:32,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:32,708 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:32,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 04:02:32,708 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash -658014312, now seen corresponding path program 8 times [2022-02-24 04:02:32,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:32,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050687206] [2022-02-24 04:02:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:32,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:32,857 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:32,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:33,080 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:33,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050687206] [2022-02-24 04:02:33,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1050687206] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:33,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:33,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:02:33,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657974955] [2022-02-24 04:02:33,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:33,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:02:33,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:33,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:02:33,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:02:33,082 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:33,295 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-02-24 04:02:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:02:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 04:02:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:33,296 INFO L225 Difference]: With dead ends: 27 [2022-02-24 04:02:33,296 INFO L226 Difference]: Without dead ends: 22 [2022-02-24 04:02:33,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-02-24 04:02:33,296 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:33,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 66 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-24 04:02:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-02-24 04:02:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-02-24 04:02:33,299 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2022-02-24 04:02:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:33,299 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-02-24 04:02:33,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-02-24 04:02:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 04:02:33,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:33,300 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:33,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 04:02:33,300 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:33,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1111781638, now seen corresponding path program 9 times [2022-02-24 04:02:33,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:33,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099466039] [2022-02-24 04:02:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:33,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:33,426 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:33,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:33,612 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:33,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099466039] [2022-02-24 04:02:33,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099466039] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:33,613 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:33,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:02:33,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196785582] [2022-02-24 04:02:33,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:33,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 04:02:33,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 04:02:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:02:33,614 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 17 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:33,826 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-02-24 04:02:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 04:02:33,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-24 04:02:33,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:33,827 INFO L225 Difference]: With dead ends: 28 [2022-02-24 04:02:33,827 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 04:02:33,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-02-24 04:02:33,828 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:33,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 71 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 04:02:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-24 04:02:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-02-24 04:02:33,830 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2022-02-24 04:02:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:33,830 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-02-24 04:02:33,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-02-24 04:02:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 04:02:33,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:33,831 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:33,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 04:02:33,831 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash 140881240, now seen corresponding path program 10 times [2022-02-24 04:02:33,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:33,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651816956] [2022-02-24 04:02:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:33,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:33,976 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:33,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:34,198 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:34,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651816956] [2022-02-24 04:02:34,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1651816956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:34,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:34,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 04:02:34,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350892279] [2022-02-24 04:02:34,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:34,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 04:02:34,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 04:02:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:02:34,200 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 18 states, 16 states have (on average 1.125) 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 04:02:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:34,467 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-02-24 04:02:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:02:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.125) 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 04:02:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:34,468 INFO L225 Difference]: With dead ends: 29 [2022-02-24 04:02:34,468 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 04:02:34,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 04:02:34,469 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:34,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 71 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 04:02:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-24 04:02:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-02-24 04:02:34,472 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2022-02-24 04:02:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:34,472 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-02-24 04:02:34,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.125) 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 04:02:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-02-24 04:02:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 04:02:34,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:34,473 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:34,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 04:02:34,473 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash 107739974, now seen corresponding path program 11 times [2022-02-24 04:02:34,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:34,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794366307] [2022-02-24 04:02:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:34,588 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:34,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:34,611 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 04:02:34,819 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:34,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794366307] [2022-02-24 04:02:34,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794366307] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:34,819 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:34,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 04:02:34,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521254545] [2022-02-24 04:02:34,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:34,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 04:02:34,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 04:02:34,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:02:34,821 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 19 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:35,089 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-02-24 04:02:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:02:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 04:02:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:35,089 INFO L225 Difference]: With dead ends: 30 [2022-02-24 04:02:35,089 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 04:02:35,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 04:02:35,091 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:35,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 76 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 04:02:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-24 04:02:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-02-24 04:02:35,093 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2022-02-24 04:02:35,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:35,094 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-02-24 04:02:35,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-02-24 04:02:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 04:02:35,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:35,094 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:35,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 04:02:35,094 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash -919639272, now seen corresponding path program 12 times [2022-02-24 04:02:35,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:35,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294547988] [2022-02-24 04:02:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:35,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:35,230 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:35,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:35,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:35,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294547988] [2022-02-24 04:02:35,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294547988] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:35,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:35,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 04:02:35,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323038044] [2022-02-24 04:02:35,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:35,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:02:35,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:02:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:02:35,522 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:35,870 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-02-24 04:02:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 04:02:35,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 04:02:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:35,870 INFO L225 Difference]: With dead ends: 31 [2022-02-24 04:02:35,870 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 04:02:35,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 04:02:35,871 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:35,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 04:02:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 04:02:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-02-24 04:02:35,874 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2022-02-24 04:02:35,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:35,874 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-02-24 04:02:35,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:35,875 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-02-24 04:02:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 04:02:35,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:35,875 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:35,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 04:02:35,875 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:35,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1591342470, now seen corresponding path program 13 times [2022-02-24 04:02:35,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:35,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251371544] [2022-02-24 04:02:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:35,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:36,003 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:36,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:36,026 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 04:02:36,268 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:36,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251371544] [2022-02-24 04:02:36,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1251371544] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:36,268 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:36,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:02:36,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97224941] [2022-02-24 04:02:36,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:36,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 04:02:36,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:36,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 04:02:36,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:02:36,269 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 21 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:36,558 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-02-24 04:02:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 04:02:36,558 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 04:02:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:36,559 INFO L225 Difference]: With dead ends: 32 [2022-02-24 04:02:36,559 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 04:02:36,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 04:02:36,560 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:36,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 91 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 04:02:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 04:02:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-02-24 04:02:36,563 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2022-02-24 04:02:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:36,563 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-02-24 04:02:36,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-02-24 04:02:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 04:02:36,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:36,564 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:36,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 04:02:36,564 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:36,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:36,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2122365144, now seen corresponding path program 14 times [2022-02-24 04:02:36,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:36,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253429534] [2022-02-24 04:02:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:36,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:36,673 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:36,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:36,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253429534] [2022-02-24 04:02:36,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [253429534] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:36,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:36,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 04:02:36,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317132800] [2022-02-24 04:02:36,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:36,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 04:02:36,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:36,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 04:02:36,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:02:36,952 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:37,352 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-02-24 04:02:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 04:02:37,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 04:02:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:37,361 INFO L225 Difference]: With dead ends: 33 [2022-02-24 04:02:37,361 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 04:02:37,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 04:02:37,364 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:37,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 86 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 04:02:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-24 04:02:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-02-24 04:02:37,369 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2022-02-24 04:02:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:37,369 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-02-24 04:02:37,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-02-24 04:02:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 04:02:37,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:37,370 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:37,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 04:02:37,370 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1404198854, now seen corresponding path program 15 times [2022-02-24 04:02:37,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:37,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508785170] [2022-02-24 04:02:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:37,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:37,478 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:37,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:37,772 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:37,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508785170] [2022-02-24 04:02:37,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508785170] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:37,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:37,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 04:02:37,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165780542] [2022-02-24 04:02:37,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:37,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 04:02:37,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:37,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 04:02:37,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:02:37,774 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 23 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:38,133 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-02-24 04:02:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 04:02:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 04:02:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:38,134 INFO L225 Difference]: With dead ends: 34 [2022-02-24 04:02:38,134 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 04:02:38,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 04:02:38,136 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:38,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 101 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:02:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 04:02:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-24 04:02:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-02-24 04:02:38,139 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2022-02-24 04:02:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:38,140 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-02-24 04:02:38,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:38,140 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-02-24 04:02:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:02:38,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:38,140 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:38,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 04:02:38,141 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:38,141 INFO L85 PathProgramCache]: Analyzing trace with hash 615880344, now seen corresponding path program 16 times [2022-02-24 04:02:38,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:38,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765283948] [2022-02-24 04:02:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:38,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:38,229 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:38,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:38,610 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:38,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765283948] [2022-02-24 04:02:38,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [765283948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:38,610 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:38,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 04:02:38,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871508613] [2022-02-24 04:02:38,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:38,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 04:02:38,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 04:02:38,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:02:38,612 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:39,158 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-02-24 04:02:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 04:02:39,159 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 04:02:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:39,159 INFO L225 Difference]: With dead ends: 35 [2022-02-24 04:02:39,159 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 04:02:39,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 04:02:39,161 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:39,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 101 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:02:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 04:02:39,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 04:02:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-02-24 04:02:39,164 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2022-02-24 04:02:39,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:39,164 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-02-24 04:02:39,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-02-24 04:02:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 04:02:39,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:39,165 INFO L514 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:39,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 04:02:39,165 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1947810310, now seen corresponding path program 17 times [2022-02-24 04:02:39,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:39,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662461210] [2022-02-24 04:02:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:39,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:39,431 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:39,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:39,812 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:39,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662461210] [2022-02-24 04:02:39,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [662461210] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:39,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:39,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 04:02:39,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588244221] [2022-02-24 04:02:39,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:39,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 04:02:39,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:39,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 04:02:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2022-02-24 04:02:39,814 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 25 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:40,303 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-02-24 04:02:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 04:02:40,304 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 04:02:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:40,304 INFO L225 Difference]: With dead ends: 36 [2022-02-24 04:02:40,304 INFO L226 Difference]: Without dead ends: 31 [2022-02-24 04:02:40,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=1997, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 04:02:40,305 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:40,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 106 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:02:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-24 04:02:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-24 04:02:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-02-24 04:02:40,308 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2022-02-24 04:02:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:40,308 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-02-24 04:02:40,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-02-24 04:02:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:02:40,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:40,309 INFO L514 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:40,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 04:02:40,309 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash 287966296, now seen corresponding path program 18 times [2022-02-24 04:02:40,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:40,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159285453] [2022-02-24 04:02:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:40,445 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:40,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:40,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:40,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159285453] [2022-02-24 04:02:40,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159285453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:40,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:40,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 04:02:40,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116869413] [2022-02-24 04:02:40,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:40,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 04:02:40,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:40,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 04:02:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2022-02-24 04:02:40,980 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 26 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:41,588 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-02-24 04:02:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 04:02:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 04:02:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:41,591 INFO L225 Difference]: With dead ends: 37 [2022-02-24 04:02:41,591 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 04:02:41,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=2181, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 04:02:41,592 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:41,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:02:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 04:02:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-24 04:02:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-02-24 04:02:41,595 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2022-02-24 04:02:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:41,595 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-02-24 04:02:41,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-02-24 04:02:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:02:41,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:41,595 INFO L514 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:41,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 04:02:41,596 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash 372409414, now seen corresponding path program 19 times [2022-02-24 04:02:41,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:41,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512781276] [2022-02-24 04:02:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:41,751 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:41,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:42,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:42,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512781276] [2022-02-24 04:02:42,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512781276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:42,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:42,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 04:02:42,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862150162] [2022-02-24 04:02:42,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:42,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 04:02:42,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:42,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 04:02:42,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-02-24 04:02:42,109 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 27 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:42,577 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-02-24 04:02:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 04:02:42,577 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 04:02:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:42,578 INFO L225 Difference]: With dead ends: 38 [2022-02-24 04:02:42,578 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 04:02:42,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 04:02:42,579 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:42,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 111 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:02:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 04:02:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-24 04:02:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:42,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-02-24 04:02:42,582 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2022-02-24 04:02:42,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:42,582 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-02-24 04:02:42,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-02-24 04:02:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 04:02:42,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:42,583 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:42,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 04:02:42,583 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:42,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:42,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1304821224, now seen corresponding path program 20 times [2022-02-24 04:02:42,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:42,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977623658] [2022-02-24 04:02:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:42,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:42,682 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:42,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:43,092 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:43,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977623658] [2022-02-24 04:02:43,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [977623658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:43,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:43,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 04:02:43,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064103446] [2022-02-24 04:02:43,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:43,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 04:02:43,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 04:02:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2022-02-24 04:02:43,093 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:43,723 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-02-24 04:02:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 04:02:43,723 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 04:02:43,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:43,724 INFO L225 Difference]: With dead ends: 39 [2022-02-24 04:02:43,724 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 04:02:43,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=2573, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 04:02:43,725 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:43,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:02:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 04:02:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-24 04:02:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-02-24 04:02:43,728 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2022-02-24 04:02:43,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:43,728 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-02-24 04:02:43,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-02-24 04:02:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:02:43,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:43,729 INFO L514 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:43,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 04:02:43,729 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:43,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1759363450, now seen corresponding path program 21 times [2022-02-24 04:02:43,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:43,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982077261] [2022-02-24 04:02:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:43,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:43,873 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:43,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:44,343 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:44,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982077261] [2022-02-24 04:02:44,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [982077261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:44,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:44,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 04:02:44,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656972134] [2022-02-24 04:02:44,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:44,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 04:02:44,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 04:02:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2022-02-24 04:02:44,345 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 29 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:45,091 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-02-24 04:02:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 04:02:45,094 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 04:02:45,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:45,094 INFO L225 Difference]: With dead ends: 40 [2022-02-24 04:02:45,095 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 04:02:45,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=2781, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 04:02:45,096 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:45,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 126 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:02:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 04:02:45,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-24 04:02:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-02-24 04:02:45,100 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2022-02-24 04:02:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:45,100 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-02-24 04:02:45,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-02-24 04:02:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:02:45,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:45,101 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:45,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 04:02:45,101 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1329696728, now seen corresponding path program 22 times [2022-02-24 04:02:45,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:45,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158365135] [2022-02-24 04:02:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:45,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:45,217 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:45,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:45,776 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:45,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158365135] [2022-02-24 04:02:45,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [158365135] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:45,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:45,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 04:02:45,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560586169] [2022-02-24 04:02:45,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:45,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 04:02:45,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 04:02:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2022-02-24 04:02:45,778 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 30 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:46,586 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-02-24 04:02:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 04:02:46,586 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 04:02:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:46,587 INFO L225 Difference]: With dead ends: 41 [2022-02-24 04:02:46,587 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 04:02:46,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=2997, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 04:02:46,588 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:46,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:02:46,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 04:02:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-24 04:02:46,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-02-24 04:02:46,592 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2022-02-24 04:02:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:46,592 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-02-24 04:02:46,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-02-24 04:02:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 04:02:46,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:46,593 INFO L514 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:46,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 04:02:46,593 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:46,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1693685562, now seen corresponding path program 23 times [2022-02-24 04:02:46,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:46,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943422235] [2022-02-24 04:02:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:46,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:46,841 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:46,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:47,381 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:47,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943422235] [2022-02-24 04:02:47,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [943422235] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:47,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:47,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 04:02:47,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286790520] [2022-02-24 04:02:47,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:47,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 04:02:47,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:47,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 04:02:47,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2022-02-24 04:02:47,383 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 31 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:48,107 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-02-24 04:02:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 04:02:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 04:02:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:48,107 INFO L225 Difference]: With dead ends: 42 [2022-02-24 04:02:48,107 INFO L226 Difference]: Without dead ends: 37 [2022-02-24 04:02:48,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=3221, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 04:02:48,109 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:48,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:02:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-24 04:02:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-24 04:02:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-02-24 04:02:48,115 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2022-02-24 04:02:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:48,116 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-02-24 04:02:48,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-02-24 04:02:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 04:02:48,116 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:48,117 INFO L514 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:48,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 04:02:48,117 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash -929256040, now seen corresponding path program 24 times [2022-02-24 04:02:48,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:48,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903721488] [2022-02-24 04:02:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:48,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:48,247 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:48,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:48,654 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:48,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903721488] [2022-02-24 04:02:48,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903721488] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:48,656 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:48,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 04:02:48,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844650890] [2022-02-24 04:02:48,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:48,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 04:02:48,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:48,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 04:02:48,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2022-02-24 04:02:48,664 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 32 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:49,466 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-02-24 04:02:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 04:02:49,466 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 04:02:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:49,467 INFO L225 Difference]: With dead ends: 43 [2022-02-24 04:02:49,467 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 04:02:49,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=3453, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 04:02:49,468 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:49,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:02:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 04:02:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-24 04:02:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-02-24 04:02:49,472 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2022-02-24 04:02:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:49,472 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-02-24 04:02:49,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-02-24 04:02:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 04:02:49,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:49,472 INFO L514 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:49,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 04:02:49,473 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:49,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1293222662, now seen corresponding path program 25 times [2022-02-24 04:02:49,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:49,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586261863] [2022-02-24 04:02:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:49,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:49,538 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:49,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:50,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:50,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586261863] [2022-02-24 04:02:50,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [586261863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:50,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:50,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 04:02:50,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733687871] [2022-02-24 04:02:50,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:50,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 04:02:50,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:50,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 04:02:50,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 04:02:50,043 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 33 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:50,674 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-02-24 04:02:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 04:02:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-24 04:02:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:50,674 INFO L225 Difference]: With dead ends: 44 [2022-02-24 04:02:50,674 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 04:02:50,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=3693, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 04:02:50,676 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:50,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 151 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:02:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 04:02:50,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-24 04:02:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-02-24 04:02:50,688 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2022-02-24 04:02:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:50,688 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-02-24 04:02:50,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:50,688 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-02-24 04:02:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 04:02:50,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:50,689 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:50,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 04:02:50,689 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1470585688, now seen corresponding path program 26 times [2022-02-24 04:02:50,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:50,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391275658] [2022-02-24 04:02:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:50,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:50,781 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:50,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:51,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:51,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391275658] [2022-02-24 04:02:51,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [391275658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:51,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:51,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 04:02:51,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958082847] [2022-02-24 04:02:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:51,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 04:02:51,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 04:02:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 04:02:51,399 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 34 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:52,108 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-02-24 04:02:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 04:02:52,108 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 04:02:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:52,109 INFO L225 Difference]: With dead ends: 45 [2022-02-24 04:02:52,109 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 04:02:52,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=3941, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 04:02:52,110 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:52,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:02:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 04:02:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-24 04:02:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-02-24 04:02:52,124 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2022-02-24 04:02:52,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:52,124 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-02-24 04:02:52,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:52,124 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-02-24 04:02:52,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 04:02:52,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:52,125 INFO L514 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:52,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 04:02:52,125 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1621095098, now seen corresponding path program 27 times [2022-02-24 04:02:52,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:52,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399197505] [2022-02-24 04:02:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:52,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:52,209 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:52,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:52,727 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:52,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399197505] [2022-02-24 04:02:52,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399197505] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:52,728 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:52,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 04:02:52,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936531766] [2022-02-24 04:02:52,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:52,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 04:02:52,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 04:02:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 04:02:52,729 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 35 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:53,807 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-02-24 04:02:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 04:02:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 04:02:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:53,808 INFO L225 Difference]: With dead ends: 46 [2022-02-24 04:02:53,808 INFO L226 Difference]: Without dead ends: 41 [2022-02-24 04:02:53,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=4197, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 04:02:53,810 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:53,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 161 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:02:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-24 04:02:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-24 04:02:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-02-24 04:02:53,814 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2022-02-24 04:02:53,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:53,814 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-02-24 04:02:53,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-02-24 04:02:53,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 04:02:53,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:53,815 INFO L514 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:53,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 04:02:53,815 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:53,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:53,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1321048344, now seen corresponding path program 28 times [2022-02-24 04:02:53,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:53,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560360565] [2022-02-24 04:02:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:53,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:53,938 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:53,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:54,563 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:54,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560360565] [2022-02-24 04:02:54,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [560360565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:54,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:54,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 04:02:54,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299509790] [2022-02-24 04:02:54,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:54,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 04:02:54,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:54,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 04:02:54,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 04:02:54,565 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 36 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:55,634 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-02-24 04:02:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 04:02:55,635 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 04:02:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:55,635 INFO L225 Difference]: With dead ends: 47 [2022-02-24 04:02:55,635 INFO L226 Difference]: Without dead ends: 42 [2022-02-24 04:02:55,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=4461, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 04:02:55,637 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:55,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 161 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:02:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-24 04:02:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-24 04:02:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-02-24 04:02:55,641 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2022-02-24 04:02:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:55,641 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-02-24 04:02:55,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-02-24 04:02:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 04:02:55,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:55,642 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:55,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 04:02:55,642 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:55,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1961785466, now seen corresponding path program 29 times [2022-02-24 04:02:55,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:55,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117821366] [2022-02-24 04:02:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:55,754 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:55,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:56,389 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:56,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117821366] [2022-02-24 04:02:56,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117821366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:56,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:56,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 04:02:56,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984152337] [2022-02-24 04:02:56,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:56,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 04:02:56,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:56,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 04:02:56,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 04:02:56,391 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 37 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:57,551 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-02-24 04:02:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 04:02:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 04:02:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:57,551 INFO L225 Difference]: With dead ends: 48 [2022-02-24 04:02:57,552 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 04:02:57,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=4733, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 04:02:57,553 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:57,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:02:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 04:02:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-24 04:02:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-02-24 04:02:57,558 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2022-02-24 04:02:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:57,558 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-02-24 04:02:57,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-02-24 04:02:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 04:02:57,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:57,559 INFO L514 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:57,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 04:02:57,559 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash -650418472, now seen corresponding path program 30 times [2022-02-24 04:02:57,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:57,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399369562] [2022-02-24 04:02:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:57,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:57,660 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:57,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:02:58,423 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:02:58,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399369562] [2022-02-24 04:02:58,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399369562] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:02:58,424 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:02:58,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 04:02:58,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144205716] [2022-02-24 04:02:58,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:02:58,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 04:02:58,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:02:58,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 04:02:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 04:02:58,425 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 38 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:02:59,705 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-02-24 04:02:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 04:02:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 04:02:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:02:59,705 INFO L225 Difference]: With dead ends: 49 [2022-02-24 04:02:59,706 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 04:02:59,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 04:02:59,706 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:02:59,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 171 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:02:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 04:02:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-24 04:02:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-02-24 04:02:59,715 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2022-02-24 04:02:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:02:59,715 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-02-24 04:02:59,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:02:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-02-24 04:02:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 04:02:59,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:02:59,716 INFO L514 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:02:59,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 04:02:59,716 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:02:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:02:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1347252678, now seen corresponding path program 31 times [2022-02-24 04:02:59,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:02:59,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241134347] [2022-02-24 04:02:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:02:59,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:02:59,806 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:02:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:59,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:02:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:02:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:00,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:00,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241134347] [2022-02-24 04:03:00,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241134347] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:00,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:00,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 04:03:00,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110032708] [2022-02-24 04:03:00,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:00,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 04:03:00,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 04:03:00,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 04:03:00,416 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 39 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:01,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:01,580 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-02-24 04:03:01,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 04:03:01,581 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-24 04:03:01,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:01,582 INFO L225 Difference]: With dead ends: 50 [2022-02-24 04:03:01,582 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 04:03:01,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=249, Invalid=5301, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 04:03:01,583 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:01,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 171 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:03:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 04:03:01,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-24 04:03:01,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:01,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-02-24 04:03:01,585 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2022-02-24 04:03:01,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:01,586 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-02-24 04:03:01,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:01,586 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-02-24 04:03:01,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 04:03:01,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:01,586 INFO L514 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:01,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 04:03:01,586 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1149451112, now seen corresponding path program 32 times [2022-02-24 04:03:01,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:01,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193508960] [2022-02-24 04:03:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:01,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:01,743 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:01,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:02,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:02,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193508960] [2022-02-24 04:03:02,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193508960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:02,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:02,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 04:03:02,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143459333] [2022-02-24 04:03:02,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:02,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 04:03:02,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 04:03:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 04:03:02,634 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 40 states, 38 states have (on average 1.0526315789473684) 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 04:03:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:03,920 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-02-24 04:03:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 04:03:03,920 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.0526315789473684) 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 04:03:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:03,921 INFO L225 Difference]: With dead ends: 51 [2022-02-24 04:03:03,921 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 04:03:03,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=255, Invalid=5597, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 04:03:03,922 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:03,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 176 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:03:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 04:03:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-24 04:03:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-02-24 04:03:03,925 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2022-02-24 04:03:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:03,925 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-02-24 04:03:03,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.0526315789473684) 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 04:03:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-02-24 04:03:03,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 04:03:03,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:03,925 INFO L514 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:03,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 04:03:03,925 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1237857274, now seen corresponding path program 33 times [2022-02-24 04:03:03,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:03,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171378653] [2022-02-24 04:03:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:03,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:03,998 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:04,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:04,800 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:04,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171378653] [2022-02-24 04:03:04,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171378653] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:04,800 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:04,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 04:03:04,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378152166] [2022-02-24 04:03:04,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:04,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 04:03:04,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 04:03:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1551, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 04:03:04,802 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 41 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:06,280 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-02-24 04:03:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 04:03:06,280 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-24 04:03:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:06,281 INFO L225 Difference]: With dead ends: 52 [2022-02-24 04:03:06,281 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 04:03:06,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=5901, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 04:03:06,282 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:06,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 196 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:03:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 04:03:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-24 04:03:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-02-24 04:03:06,286 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2022-02-24 04:03:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:06,286 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-02-24 04:03:06,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-02-24 04:03:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 04:03:06,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:06,286 INFO L514 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:06,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 04:03:06,287 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash 316519000, now seen corresponding path program 34 times [2022-02-24 04:03:06,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:06,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750720713] [2022-02-24 04:03:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:06,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:06,448 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:06,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:07,316 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:07,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750720713] [2022-02-24 04:03:07,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1750720713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:07,316 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:07,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 04:03:07,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932324032] [2022-02-24 04:03:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:07,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 04:03:07,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 04:03:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1631, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 04:03:07,318 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 42 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:08,918 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-02-24 04:03:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 04:03:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 04:03:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:08,918 INFO L225 Difference]: With dead ends: 53 [2022-02-24 04:03:08,918 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 04:03:08,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=267, Invalid=6213, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 04:03:08,919 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:08,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 196 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1558 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:03:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 04:03:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-24 04:03:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-02-24 04:03:08,922 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2022-02-24 04:03:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:08,922 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-02-24 04:03:08,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-02-24 04:03:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 04:03:08,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:08,922 INFO L514 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:08,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 04:03:08,923 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1257543238, now seen corresponding path program 35 times [2022-02-24 04:03:08,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:08,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436124814] [2022-02-24 04:03:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:08,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:09,047 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:09,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:09,951 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:09,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436124814] [2022-02-24 04:03:09,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [436124814] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:09,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:09,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 04:03:09,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10494838] [2022-02-24 04:03:09,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:09,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 04:03:09,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:09,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 04:03:09,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 04:03:09,953 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 43 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:11,626 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-02-24 04:03:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 04:03:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 04:03:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:11,627 INFO L225 Difference]: With dead ends: 54 [2022-02-24 04:03:11,627 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 04:03:11,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=273, Invalid=6533, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 04:03:11,628 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:11,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 206 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:03:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 04:03:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-24 04:03:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-02-24 04:03:11,632 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2022-02-24 04:03:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:11,632 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-02-24 04:03:11,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-02-24 04:03:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 04:03:11,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:11,633 INFO L514 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:11,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 04:03:11,633 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:11,633 INFO L85 PathProgramCache]: Analyzing trace with hash 364523544, now seen corresponding path program 36 times [2022-02-24 04:03:11,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:11,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618131827] [2022-02-24 04:03:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:11,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:11,720 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:11,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:12,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:12,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618131827] [2022-02-24 04:03:12,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618131827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:12,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:12,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 04:03:12,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290572216] [2022-02-24 04:03:12,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:12,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-24 04:03:12,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-24 04:03:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1797, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 04:03:12,338 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 44 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:13,632 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-02-24 04:03:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 04:03:13,633 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 04:03:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:13,633 INFO L225 Difference]: With dead ends: 55 [2022-02-24 04:03:13,633 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 04:03:13,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=6861, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 04:03:13,635 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:13,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 201 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:03:13,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 04:03:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-24 04:03:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-02-24 04:03:13,638 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2022-02-24 04:03:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:13,639 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-02-24 04:03:13,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-02-24 04:03:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 04:03:13,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:13,639 INFO L514 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:13,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 04:03:13,639 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1549283194, now seen corresponding path program 37 times [2022-02-24 04:03:13,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:13,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847600745] [2022-02-24 04:03:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:13,755 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:13,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:14,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:14,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847600745] [2022-02-24 04:03:14,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1847600745] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:14,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:14,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-24 04:03:14,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612848036] [2022-02-24 04:03:14,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:14,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 04:03:14,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:14,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 04:03:14,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1883, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 04:03:14,791 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 45 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:16,476 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-02-24 04:03:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 04:03:16,476 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-02-24 04:03:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:16,477 INFO L225 Difference]: With dead ends: 56 [2022-02-24 04:03:16,477 INFO L226 Difference]: Without dead ends: 51 [2022-02-24 04:03:16,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=285, Invalid=7197, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 04:03:16,478 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:16,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 211 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:03:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-24 04:03:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-24 04:03:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-02-24 04:03:16,489 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2022-02-24 04:03:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:16,489 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-02-24 04:03:16,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-02-24 04:03:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 04:03:16,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:16,496 INFO L514 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:16,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 04:03:16,497 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:16,497 INFO L85 PathProgramCache]: Analyzing trace with hash -747749928, now seen corresponding path program 38 times [2022-02-24 04:03:16,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:16,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259559118] [2022-02-24 04:03:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:16,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:16,650 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:16,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:17,737 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:17,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259559118] [2022-02-24 04:03:17,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [259559118] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:17,737 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:17,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 04:03:17,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60069696] [2022-02-24 04:03:17,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:17,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-24 04:03:17,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-24 04:03:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1971, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 04:03:17,739 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 46 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:19,247 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-02-24 04:03:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 04:03:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 04:03:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:19,248 INFO L225 Difference]: With dead ends: 57 [2022-02-24 04:03:19,248 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 04:03:19,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=291, Invalid=7541, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 04:03:19,249 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1803 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:19,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 206 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1803 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:03:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 04:03:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-02-24 04:03:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-02-24 04:03:19,251 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2022-02-24 04:03:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:19,251 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-02-24 04:03:19,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-02-24 04:03:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 04:03:19,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:19,252 INFO L514 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:19,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 04:03:19,252 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:19,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1670022458, now seen corresponding path program 39 times [2022-02-24 04:03:19,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:19,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583838179] [2022-02-24 04:03:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:19,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:19,365 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:19,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:20,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:20,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583838179] [2022-02-24 04:03:20,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583838179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:20,230 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:20,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-24 04:03:20,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273797744] [2022-02-24 04:03:20,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:20,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 04:03:20,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 04:03:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2061, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 04:03:20,231 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 47 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:21,678 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-02-24 04:03:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 04:03:21,679 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 04:03:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:21,679 INFO L225 Difference]: With dead ends: 58 [2022-02-24 04:03:21,679 INFO L226 Difference]: Without dead ends: 53 [2022-02-24 04:03:21,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=297, Invalid=7893, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 04:03:21,682 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:21,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 211 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:03:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-24 04:03:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-24 04:03:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-02-24 04:03:21,685 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2022-02-24 04:03:21,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:21,686 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-02-24 04:03:21,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:21,686 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-02-24 04:03:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:03:21,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:21,686 INFO L514 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:21,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 04:03:21,687 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash -195699816, now seen corresponding path program 40 times [2022-02-24 04:03:21,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:21,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40140198] [2022-02-24 04:03:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:21,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:21,846 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:21,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:22,935 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:22,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40140198] [2022-02-24 04:03:22,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [40140198] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:22,935 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:22,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 04:03:22,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914440055] [2022-02-24 04:03:22,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:22,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 04:03:22,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:22,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 04:03:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2153, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 04:03:22,937 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 48 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:25,003 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-02-24 04:03:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 04:03:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 04:03:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:25,005 INFO L225 Difference]: With dead ends: 59 [2022-02-24 04:03:25,005 INFO L226 Difference]: Without dead ends: 54 [2022-02-24 04:03:25,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=303, Invalid=8253, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 04:03:25,006 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:25,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 221 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2024 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 04:03:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-24 04:03:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-24 04:03:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-02-24 04:03:25,010 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2022-02-24 04:03:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:25,010 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-02-24 04:03:25,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-02-24 04:03:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 04:03:25,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:25,010 INFO L514 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:25,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 04:03:25,011 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1736338170, now seen corresponding path program 41 times [2022-02-24 04:03:25,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:25,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856942986] [2022-02-24 04:03:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:25,146 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:25,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:26,212 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:26,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856942986] [2022-02-24 04:03:26,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856942986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:26,213 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:26,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 04:03:26,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297593400] [2022-02-24 04:03:26,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:26,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 04:03:26,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:26,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 04:03:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 04:03:26,214 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 49 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:28,227 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-02-24 04:03:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 04:03:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-24 04:03:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:28,228 INFO L225 Difference]: With dead ends: 60 [2022-02-24 04:03:28,228 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 04:03:28,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=309, Invalid=8621, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 04:03:28,229 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:28,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 221 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 04:03:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 04:03:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-24 04:03:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-02-24 04:03:28,233 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2022-02-24 04:03:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:28,233 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-02-24 04:03:28,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-02-24 04:03:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:03:28,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:28,234 INFO L514 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:28,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 04:03:28,234 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:28,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2043480408, now seen corresponding path program 42 times [2022-02-24 04:03:28,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:28,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537206022] [2022-02-24 04:03:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:28,319 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:28,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:29,514 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:29,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537206022] [2022-02-24 04:03:29,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [537206022] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:29,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:29,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 04:03:29,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536519056] [2022-02-24 04:03:29,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:29,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 04:03:29,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 04:03:29,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2343, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 04:03:29,517 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 50 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:31,747 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-02-24 04:03:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 04:03:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 04:03:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:31,748 INFO L225 Difference]: With dead ends: 61 [2022-02-24 04:03:31,748 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 04:03:31,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=315, Invalid=8997, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 04:03:31,750 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:31,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 231 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2207 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 04:03:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 04:03:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-24 04:03:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-02-24 04:03:31,752 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2022-02-24 04:03:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:31,753 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-02-24 04:03:31,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-02-24 04:03:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:03:31,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:31,753 INFO L514 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:31,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 04:03:31,753 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1041227962, now seen corresponding path program 43 times [2022-02-24 04:03:31,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:31,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647595209] [2022-02-24 04:03:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:31,896 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:31,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:33,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:33,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647595209] [2022-02-24 04:03:33,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647595209] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:33,219 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:33,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 04:03:33,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304728550] [2022-02-24 04:03:33,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:33,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 04:03:33,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:33,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 04:03:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2441, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 04:03:33,221 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 51 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:35,459 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-02-24 04:03:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 04:03:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 04:03:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:35,460 INFO L225 Difference]: With dead ends: 62 [2022-02-24 04:03:35,460 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 04:03:35,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=321, Invalid=9381, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 04:03:35,464 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2256 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:35,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 231 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2256 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 04:03:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 04:03:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-24 04:03:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-02-24 04:03:35,475 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2022-02-24 04:03:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:35,476 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-02-24 04:03:35,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-02-24 04:03:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 04:03:35,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:35,476 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:35,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 04:03:35,477 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2117060376, now seen corresponding path program 44 times [2022-02-24 04:03:35,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:35,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470653021] [2022-02-24 04:03:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:35,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:35,579 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:35,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:36,737 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:36,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470653021] [2022-02-24 04:03:36,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [470653021] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:36,737 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:36,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 04:03:36,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739625992] [2022-02-24 04:03:36,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:36,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-24 04:03:36,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-24 04:03:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2541, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 04:03:36,739 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 52 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:38,793 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-02-24 04:03:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 04:03:38,794 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 04:03:38,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:38,796 INFO L225 Difference]: With dead ends: 63 [2022-02-24 04:03:38,796 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 04:03:38,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=327, Invalid=9773, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 04:03:38,803 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:38,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 246 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 04:03:38,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 04:03:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-02-24 04:03:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-02-24 04:03:38,809 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2022-02-24 04:03:38,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:38,809 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-02-24 04:03:38,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-02-24 04:03:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 04:03:38,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:38,810 INFO L514 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:38,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 04:03:38,810 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:38,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1239751046, now seen corresponding path program 45 times [2022-02-24 04:03:38,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:38,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199871308] [2022-02-24 04:03:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:38,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:38,926 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:38,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:40,155 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:40,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199871308] [2022-02-24 04:03:40,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199871308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:40,155 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:40,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-24 04:03:40,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216548553] [2022-02-24 04:03:40,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:40,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 04:03:40,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 04:03:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2643, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 04:03:40,156 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 53 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:43,103 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-02-24 04:03:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 04:03:43,103 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-24 04:03:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:43,104 INFO L225 Difference]: With dead ends: 64 [2022-02-24 04:03:43,104 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 04:03:43,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=333, Invalid=10173, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 04:03:43,105 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:43,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 256 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 04:03:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 04:03:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-24 04:03:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-02-24 04:03:43,109 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2022-02-24 04:03:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:43,109 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-02-24 04:03:43,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-02-24 04:03:43,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 04:03:43,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:43,109 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:43,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 04:03:43,110 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:43,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:43,110 INFO L85 PathProgramCache]: Analyzing trace with hash -187034408, now seen corresponding path program 46 times [2022-02-24 04:03:43,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:43,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758443522] [2022-02-24 04:03:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:43,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:43,269 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:43,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:44,514 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:44,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758443522] [2022-02-24 04:03:44,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758443522] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:44,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:44,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 04:03:44,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890645313] [2022-02-24 04:03:44,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:44,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 04:03:44,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:44,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 04:03:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2747, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 04:03:44,516 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 54 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:47,281 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-02-24 04:03:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 04:03:47,281 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 04:03:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:47,282 INFO L225 Difference]: With dead ends: 65 [2022-02-24 04:03:47,282 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 04:03:47,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=339, Invalid=10581, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 04:03:47,283 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 2651 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:47,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 256 Invalid, 2701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2651 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 04:03:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 04:03:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-24 04:03:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-02-24 04:03:47,287 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2022-02-24 04:03:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:47,287 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-02-24 04:03:47,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-02-24 04:03:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 04:03:47,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:47,288 INFO L514 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:47,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 04:03:47,288 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1467710522, now seen corresponding path program 47 times [2022-02-24 04:03:47,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:47,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018469022] [2022-02-24 04:03:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:47,401 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:47,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:48,593 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:48,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018469022] [2022-02-24 04:03:48,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2018469022] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:48,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:48,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 04:03:48,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105730469] [2022-02-24 04:03:48,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:48,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-24 04:03:48,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-24 04:03:48,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2853, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 04:03:48,594 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 55 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:51,608 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-02-24 04:03:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 04:03:51,608 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 04:03:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:51,609 INFO L225 Difference]: With dead ends: 66 [2022-02-24 04:03:51,609 INFO L226 Difference]: Without dead ends: 61 [2022-02-24 04:03:51,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=345, Invalid=10997, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 04:03:51,611 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:51,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 256 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2701 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 04:03:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-24 04:03:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-24 04:03:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-02-24 04:03:51,619 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2022-02-24 04:03:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:51,619 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-02-24 04:03:51,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-02-24 04:03:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 04:03:51,619 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:51,620 INFO L514 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:51,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 04:03:51,620 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1781002904, now seen corresponding path program 48 times [2022-02-24 04:03:51,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:51,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715827943] [2022-02-24 04:03:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:51,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:51,728 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:51,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:53,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:53,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715827943] [2022-02-24 04:03:53,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [715827943] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:53,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:53,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-24 04:03:53,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941731615] [2022-02-24 04:03:53,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:53,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 04:03:53,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 04:03:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2961, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 04:03:53,109 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 56 states, 54 states have (on average 1.037037037037037) 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 04:03:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:03:56,105 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-02-24 04:03:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 04:03:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.037037037037037) 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 04:03:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:03:56,105 INFO L225 Difference]: With dead ends: 67 [2022-02-24 04:03:56,105 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 04:03:56,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=351, Invalid=11421, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 04:03:56,106 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:03:56,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 271 Invalid, 2967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 04:03:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 04:03:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-24 04:03:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:03:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-02-24 04:03:56,110 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2022-02-24 04:03:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:03:56,110 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-02-24 04:03:56,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.037037037037037) 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 04:03:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-02-24 04:03:56,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:03:56,110 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:03:56,110 INFO L514 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:03:56,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 04:03:56,112 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:03:56,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:03:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash -588095994, now seen corresponding path program 49 times [2022-02-24 04:03:56,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:03:56,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383902196] [2022-02-24 04:03:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:03:56,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:03:56,212 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:03:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:56,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:03:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:03:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:03:57,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:03:57,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383902196] [2022-02-24 04:03:57,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1383902196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:03:57,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:03:57,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 04:03:57,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751159851] [2022-02-24 04:03:57,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:03:57,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 04:03:57,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:03:57,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 04:03:57,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3071, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 04:03:57,590 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 57 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:00,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:00,581 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-02-24 04:04:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 04:04:00,582 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 04:04:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:00,582 INFO L225 Difference]: With dead ends: 68 [2022-02-24 04:04:00,582 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 04:04:00,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=357, Invalid=11853, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 04:04:00,584 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:00,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 266 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 04:04:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 04:04:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-24 04:04:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-02-24 04:04:00,588 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2022-02-24 04:04:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:00,588 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-02-24 04:04:00,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-02-24 04:04:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 04:04:00,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:00,589 INFO L514 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:00,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 04:04:00,589 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1015717800, now seen corresponding path program 50 times [2022-02-24 04:04:00,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:00,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307687898] [2022-02-24 04:04:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:00,715 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:00,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:00,742 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 04:04:02,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:02,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307687898] [2022-02-24 04:04:02,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [307687898] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:02,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:02,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 04:04:02,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745745146] [2022-02-24 04:04:02,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:02,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-24 04:04:02,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-24 04:04:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3183, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 04:04:02,194 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 58 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:05,544 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-02-24 04:04:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 04:04:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 04:04:05,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:05,545 INFO L225 Difference]: With dead ends: 69 [2022-02-24 04:04:05,545 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 04:04:05,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=363, Invalid=12293, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 04:04:05,546 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 3078 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:05,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 276 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3078 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 04:04:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 04:04:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-24 04:04:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-02-24 04:04:05,549 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2022-02-24 04:04:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:05,549 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-02-24 04:04:05,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-02-24 04:04:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 04:04:05,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:05,550 INFO L514 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:05,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 04:04:05,550 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1387091898, now seen corresponding path program 51 times [2022-02-24 04:04:05,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:05,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551835998] [2022-02-24 04:04:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:05,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:05,719 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:05,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:07,081 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:07,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551835998] [2022-02-24 04:04:07,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1551835998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:07,082 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:07,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-24 04:04:07,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761932799] [2022-02-24 04:04:07,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:07,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 04:04:07,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 04:04:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3297, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 04:04:07,085 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 59 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:11,813 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-02-24 04:04:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 04:04:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 04:04:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:11,814 INFO L225 Difference]: With dead ends: 70 [2022-02-24 04:04:11,814 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 04:04:11,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=369, Invalid=12741, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 04:04:11,816 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 3134 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:11,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 276 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3134 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-24 04:04:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 04:04:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-02-24 04:04:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-02-24 04:04:11,819 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2022-02-24 04:04:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:11,819 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-02-24 04:04:11,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-02-24 04:04:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 04:04:11,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:11,821 INFO L514 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:11,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 04:04:11,821 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:11,821 INFO L85 PathProgramCache]: Analyzing trace with hash -14787048, now seen corresponding path program 52 times [2022-02-24 04:04:11,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:11,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676298287] [2022-02-24 04:04:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:11,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:11,984 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:12,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:13,612 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:13,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676298287] [2022-02-24 04:04:13,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [676298287] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:13,612 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:13,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 04:04:13,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931664666] [2022-02-24 04:04:13,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:13,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 04:04:13,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:13,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 04:04:13,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=3413, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 04:04:13,613 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 60 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:18,247 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-02-24 04:04:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 04:04:18,248 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 04:04:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:18,249 INFO L225 Difference]: With dead ends: 71 [2022-02-24 04:04:18,249 INFO L226 Difference]: Without dead ends: 66 [2022-02-24 04:04:18,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=375, Invalid=13197, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 04:04:18,250 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 3305 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 3361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:18,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 286 Invalid, 3361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3305 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-24 04:04:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-24 04:04:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-02-24 04:04:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-02-24 04:04:18,256 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2022-02-24 04:04:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:18,256 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-02-24 04:04:18,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-02-24 04:04:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 04:04:18,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:18,257 INFO L514 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:18,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 04:04:18,257 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash -423009658, now seen corresponding path program 53 times [2022-02-24 04:04:18,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:18,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293597880] [2022-02-24 04:04:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:18,383 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:18,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:19,905 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:19,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293597880] [2022-02-24 04:04:19,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1293597880] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:19,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:19,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 04:04:19,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474986030] [2022-02-24 04:04:19,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:19,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 04:04:19,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 04:04:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3531, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 04:04:19,907 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 61 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:24,018 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-02-24 04:04:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 04:04:24,018 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-24 04:04:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:24,019 INFO L225 Difference]: With dead ends: 72 [2022-02-24 04:04:24,019 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 04:04:24,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=381, Invalid=13661, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 04:04:24,020 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3304 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 3361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:24,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 281 Invalid, 3361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3304 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 04:04:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 04:04:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-24 04:04:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-02-24 04:04:24,036 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2022-02-24 04:04:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:24,046 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-02-24 04:04:24,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-02-24 04:04:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 04:04:24,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:24,047 INFO L514 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:24,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 04:04:24,047 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:24,047 INFO L85 PathProgramCache]: Analyzing trace with hash -193008680, now seen corresponding path program 54 times [2022-02-24 04:04:24,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:24,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452309486] [2022-02-24 04:04:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:24,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:24,224 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:24,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:25,890 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:25,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452309486] [2022-02-24 04:04:25,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452309486] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:25,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:25,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 04:04:25,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145082701] [2022-02-24 04:04:25,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:25,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-24 04:04:25,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-24 04:04:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=3651, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 04:04:25,893 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 62 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:31,097 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-02-24 04:04:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 04:04:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 04:04:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:31,098 INFO L225 Difference]: With dead ends: 73 [2022-02-24 04:04:31,098 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 04:04:31,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=387, Invalid=14133, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 04:04:31,100 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 3479 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 3537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:31,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 291 Invalid, 3537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3479 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-24 04:04:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 04:04:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-02-24 04:04:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-02-24 04:04:31,104 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2022-02-24 04:04:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:31,104 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-02-24 04:04:31,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-02-24 04:04:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 04:04:31,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:31,105 INFO L514 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:31,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 04:04:31,105 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:31,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1652912954, now seen corresponding path program 55 times [2022-02-24 04:04:31,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:31,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276634320] [2022-02-24 04:04:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:31,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:31,245 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:31,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:33,059 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:33,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276634320] [2022-02-24 04:04:33,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276634320] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:33,059 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:33,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-24 04:04:33,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096881339] [2022-02-24 04:04:33,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:33,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 04:04:33,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 04:04:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=3773, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 04:04:33,061 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 63 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:38,385 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-02-24 04:04:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 04:04:38,386 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-02-24 04:04:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:38,387 INFO L225 Difference]: With dead ends: 74 [2022-02-24 04:04:38,387 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 04:04:38,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=393, Invalid=14613, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 04:04:38,388 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 3721 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 3780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:38,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 306 Invalid, 3780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3721 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 04:04:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 04:04:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-02-24 04:04:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-02-24 04:04:38,393 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2022-02-24 04:04:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:38,393 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-02-24 04:04:38,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-02-24 04:04:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 04:04:38,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:38,394 INFO L514 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:38,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 04:04:38,394 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 334694808, now seen corresponding path program 56 times [2022-02-24 04:04:38,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:38,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290502813] [2022-02-24 04:04:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:38,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:38,533 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:38,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:40,232 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:40,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290502813] [2022-02-24 04:04:40,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [290502813] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:40,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:40,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 04:04:40,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584584266] [2022-02-24 04:04:40,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:40,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-24 04:04:40,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:40,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-24 04:04:40,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=3897, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 04:04:40,245 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 64 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:45,462 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-02-24 04:04:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-24 04:04:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 04:04:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:45,463 INFO L225 Difference]: With dead ends: 75 [2022-02-24 04:04:45,463 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 04:04:45,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=399, Invalid=15101, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 04:04:45,464 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 3781 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 3841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:45,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 306 Invalid, 3841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3781 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-24 04:04:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 04:04:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-24 04:04:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-02-24 04:04:45,470 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2022-02-24 04:04:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:45,470 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-02-24 04:04:45,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-02-24 04:04:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 04:04:45,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:45,470 INFO L514 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:45,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 04:04:45,470 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1820993286, now seen corresponding path program 57 times [2022-02-24 04:04:45,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:45,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987885298] [2022-02-24 04:04:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:45,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:45,618 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:45,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:47,405 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:47,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987885298] [2022-02-24 04:04:47,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1987885298] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:47,405 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:47,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-24 04:04:47,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813203219] [2022-02-24 04:04:47,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:47,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 04:04:47,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 04:04:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4023, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 04:04:47,407 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 65 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:04:53,124 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-02-24 04:04:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 04:04:53,125 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 04:04:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:04:53,125 INFO L225 Difference]: With dead ends: 76 [2022-02-24 04:04:53,125 INFO L226 Difference]: Without dead ends: 71 [2022-02-24 04:04:53,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=405, Invalid=15597, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 04:04:53,127 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 3841 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 3902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:04:53,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 306 Invalid, 3902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3841 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-24 04:04:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-24 04:04:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-02-24 04:04:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-02-24 04:04:53,133 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2022-02-24 04:04:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:04:53,133 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-02-24 04:04:53,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:04:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-02-24 04:04:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 04:04:53,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:04:53,135 INFO L514 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:04:53,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 04:04:53,135 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:04:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:04:53,135 INFO L85 PathProgramCache]: Analyzing trace with hash 651605848, now seen corresponding path program 58 times [2022-02-24 04:04:53,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:04:53,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672325560] [2022-02-24 04:04:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:04:53,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:04:53,262 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:04:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:53,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:04:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:04:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:04:55,106 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:04:55,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672325560] [2022-02-24 04:04:55,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1672325560] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:04:55,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:04:55,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 04:04:55,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385933774] [2022-02-24 04:04:55,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:04:55,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-24 04:04:55,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:04:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-24 04:04:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4151, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 04:04:55,108 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 66 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:01,349 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2022-02-24 04:05:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-24 04:05:01,350 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 04:05:01,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:01,350 INFO L225 Difference]: With dead ends: 77 [2022-02-24 04:05:01,351 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 04:05:01,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2181 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=411, Invalid=16101, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 04:05:01,352 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 4030 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 4092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 4030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:01,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 316 Invalid, 4092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 4030 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-24 04:05:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 04:05:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-24 04:05:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-02-24 04:05:01,358 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2022-02-24 04:05:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:01,358 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-02-24 04:05:01,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-02-24 04:05:01,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 04:05:01,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:01,359 INFO L514 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:01,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 04:05:01,359 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:01,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1239666362, now seen corresponding path program 59 times [2022-02-24 04:05:01,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:01,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239664791] [2022-02-24 04:05:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:01,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:01,518 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:01,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:03,787 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:03,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239664791] [2022-02-24 04:05:03,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239664791] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:03,788 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:03,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-24 04:05:03,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127731312] [2022-02-24 04:05:03,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:03,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 04:05:03,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 04:05:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4281, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 04:05:03,789 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 67 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:10,178 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-02-24 04:05:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 04:05:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-24 04:05:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:10,179 INFO L225 Difference]: With dead ends: 78 [2022-02-24 04:05:10,179 INFO L226 Difference]: Without dead ends: 73 [2022-02-24 04:05:10,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=417, Invalid=16613, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 04:05:10,180 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 4094 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:10,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 316 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4094 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-02-24 04:05:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-24 04:05:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-02-24 04:05:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-02-24 04:05:10,184 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2022-02-24 04:05:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:10,185 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-02-24 04:05:10,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-02-24 04:05:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 04:05:10,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:10,185 INFO L514 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:10,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 04:05:10,185 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash 260437272, now seen corresponding path program 60 times [2022-02-24 04:05:10,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:10,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427921733] [2022-02-24 04:05:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:10,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:10,320 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:10,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:11,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:11,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427921733] [2022-02-24 04:05:11,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427921733] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:11,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:11,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 04:05:11,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525074331] [2022-02-24 04:05:11,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:12,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-24 04:05:12,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:12,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-24 04:05:12,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4413, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 04:05:12,001 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 68 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:18,804 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-02-24 04:05:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-24 04:05:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 04:05:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:18,805 INFO L225 Difference]: With dead ends: 79 [2022-02-24 04:05:18,805 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 04:05:18,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2316 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=423, Invalid=17133, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 04:05:18,806 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 4158 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 4222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:18,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 316 Invalid, 4222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4158 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-24 04:05:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 04:05:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-02-24 04:05:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-02-24 04:05:18,811 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2022-02-24 04:05:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:18,811 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-02-24 04:05:18,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-02-24 04:05:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:05:18,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:18,812 INFO L514 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:18,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 04:05:18,812 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash -480990330, now seen corresponding path program 61 times [2022-02-24 04:05:18,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:18,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463186248] [2022-02-24 04:05:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:18,909 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:18,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:20,594 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:20,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463186248] [2022-02-24 04:05:20,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463186248] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:20,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:20,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-24 04:05:20,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588807483] [2022-02-24 04:05:20,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:20,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 04:05:20,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 04:05:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=4547, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 04:05:20,596 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 69 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:28,328 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-02-24 04:05:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 04:05:28,328 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 04:05:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:28,329 INFO L225 Difference]: With dead ends: 80 [2022-02-24 04:05:28,329 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 04:05:28,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2385 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=429, Invalid=17661, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 04:05:28,331 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 4354 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 4419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:28,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 326 Invalid, 4419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 4354 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-02-24 04:05:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 04:05:28,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-02-24 04:05:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-02-24 04:05:28,335 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2022-02-24 04:05:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:28,336 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-02-24 04:05:28,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:28,337 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-02-24 04:05:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 04:05:28,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:28,338 INFO L514 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:28,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 04:05:28,338 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1990409512, now seen corresponding path program 62 times [2022-02-24 04:05:28,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:28,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746370020] [2022-02-24 04:05:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:28,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:28,519 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:28,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:30,979 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:30,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746370020] [2022-02-24 04:05:30,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [746370020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:30,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:30,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 04:05:30,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336735929] [2022-02-24 04:05:30,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:30,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-24 04:05:30,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:30,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-24 04:05:30,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=4683, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 04:05:30,980 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 70 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:44,632 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2022-02-24 04:05:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-24 04:05:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 04:05:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:44,632 INFO L225 Difference]: With dead ends: 81 [2022-02-24 04:05:44,633 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 04:05:44,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=435, Invalid=18197, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 04:05:44,634 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 4420 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 4486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:44,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 326 Invalid, 4486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4420 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-02-24 04:05:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 04:05:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-02-24 04:05:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-02-24 04:05:44,637 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2022-02-24 04:05:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:44,638 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-02-24 04:05:44,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-02-24 04:05:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 04:05:44,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:44,638 INFO L514 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:44,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 04:05:44,638 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1537763898, now seen corresponding path program 63 times [2022-02-24 04:05:44,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:44,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048394449] [2022-02-24 04:05:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:44,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:44,782 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:44,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:05:47,194 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:05:47,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048394449] [2022-02-24 04:05:47,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1048394449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:05:47,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:05:47,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-24 04:05:47,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735543867] [2022-02-24 04:05:47,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:05:47,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-24 04:05:47,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:05:47,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-24 04:05:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=4821, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 04:05:47,196 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 71 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:05:59,162 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-02-24 04:05:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 04:05:59,162 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-02-24 04:05:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:05:59,163 INFO L225 Difference]: With dead ends: 82 [2022-02-24 04:05:59,163 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 04:05:59,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=441, Invalid=18741, Unknown=0, NotChecked=0, Total=19182 [2022-02-24 04:05:59,164 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 4620 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 4687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:05:59,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 336 Invalid, 4687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4620 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-02-24 04:05:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 04:05:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-02-24 04:05:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-02-24 04:05:59,169 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2022-02-24 04:05:59,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:05:59,169 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-02-24 04:05:59,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:05:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-02-24 04:05:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 04:05:59,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:05:59,170 INFO L514 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:05:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 04:05:59,170 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:05:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:05:59,170 INFO L85 PathProgramCache]: Analyzing trace with hash -390651752, now seen corresponding path program 64 times [2022-02-24 04:05:59,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:05:59,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203397688] [2022-02-24 04:05:59,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:05:59,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:05:59,331 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:05:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:59,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:05:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:05:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:01,254 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:01,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203397688] [2022-02-24 04:06:01,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203397688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:01,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:01,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-24 04:06:01,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849118298] [2022-02-24 04:06:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 04:06:01,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:01,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 04:06:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=4961, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 04:06:01,257 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 72 states, 70 states have (on average 1.0285714285714285) 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 04:06:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:13,122 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2022-02-24 04:06:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 04:06:13,122 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 1.0285714285714285) 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 04:06:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:13,123 INFO L225 Difference]: With dead ends: 83 [2022-02-24 04:06:13,123 INFO L226 Difference]: Without dead ends: 78 [2022-02-24 04:06:13,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2598 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=447, Invalid=19293, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 04:06:13,125 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 4758 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 4826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:13,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 341 Invalid, 4826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4758 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-02-24 04:06:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-24 04:06:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-02-24 04:06:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-02-24 04:06:13,128 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2022-02-24 04:06:13,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:13,129 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-02-24 04:06:13,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 70 states have (on average 1.0285714285714285) 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 04:06:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-02-24 04:06:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 04:06:13,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:13,129 INFO L514 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:13,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 04:06:13,129 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash 810086406, now seen corresponding path program 65 times [2022-02-24 04:06:13,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:13,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483175769] [2022-02-24 04:06:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:13,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:13,306 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:13,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:15,696 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:15,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483175769] [2022-02-24 04:06:15,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [483175769] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:15,697 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:15,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 04:06:15,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774791117] [2022-02-24 04:06:15,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:15,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 04:06:15,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 04:06:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5103, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 04:06:15,698 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 73 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:28,769 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-02-24 04:06:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 04:06:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-24 04:06:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:28,770 INFO L225 Difference]: With dead ends: 84 [2022-02-24 04:06:28,770 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 04:06:28,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2671 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=453, Invalid=19853, Unknown=0, NotChecked=0, Total=20306 [2022-02-24 04:06:28,771 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 4970 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:28,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 351 Invalid, 5039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4970 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-02-24 04:06:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 04:06:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-02-24 04:06:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-02-24 04:06:28,776 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2022-02-24 04:06:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:28,776 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-02-24 04:06:28,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-02-24 04:06:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 04:06:28,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:28,777 INFO L514 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:28,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 04:06:28,777 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:28,777 INFO L85 PathProgramCache]: Analyzing trace with hash -621736360, now seen corresponding path program 66 times [2022-02-24 04:06:28,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:28,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670506811] [2022-02-24 04:06:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:28,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:28,915 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:31,150 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:31,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670506811] [2022-02-24 04:06:31,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670506811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:31,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:31,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 04:06:31,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560518011] [2022-02-24 04:06:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:31,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-24 04:06:31,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-24 04:06:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=5247, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 04:06:31,153 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 74 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:47,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:06:47,326 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-02-24 04:06:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-24 04:06:47,327 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-24 04:06:47,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:06:47,327 INFO L225 Difference]: With dead ends: 85 [2022-02-24 04:06:47,327 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 04:06:47,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2745 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=459, Invalid=20421, Unknown=0, NotChecked=0, Total=20880 [2022-02-24 04:06:47,328 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 5040 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 5040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:06:47,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 351 Invalid, 5110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5040 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-02-24 04:06:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 04:06:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-02-24 04:06:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-02-24 04:06:47,332 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2022-02-24 04:06:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:06:47,332 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-02-24 04:06:47,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:06:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-02-24 04:06:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 04:06:47,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:06:47,332 INFO L514 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:06:47,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 04:06:47,333 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:06:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:06:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2058569146, now seen corresponding path program 67 times [2022-02-24 04:06:47,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:06:47,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232626655] [2022-02-24 04:06:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:06:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:06:47,506 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:06:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:47,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:06:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:06:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:06:50,140 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:06:50,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232626655] [2022-02-24 04:06:50,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232626655] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:06:50,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:06:50,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-24 04:06:50,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489105933] [2022-02-24 04:06:50,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:06:50,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 04:06:50,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:06:50,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 04:06:50,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=5393, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 04:06:50,142 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 75 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:07,671 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-02-24 04:07:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 04:07:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-02-24 04:07:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:07,673 INFO L225 Difference]: With dead ends: 86 [2022-02-24 04:07:07,673 INFO L226 Difference]: Without dead ends: 81 [2022-02-24 04:07:07,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2820 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=465, Invalid=20997, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 04:07:07,675 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 5182 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 5253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 5182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:07,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 356 Invalid, 5253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 5182 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2022-02-24 04:07:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-24 04:07:07,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-02-24 04:07:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-02-24 04:07:07,683 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2022-02-24 04:07:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:07,684 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-02-24 04:07:07,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-02-24 04:07:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 04:07:07,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:07,684 INFO L514 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:07,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 04:07:07,685 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash 644254744, now seen corresponding path program 68 times [2022-02-24 04:07:07,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:07,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254101126] [2022-02-24 04:07:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:07,855 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:07,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:09,977 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:09,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254101126] [2022-02-24 04:07:09,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [254101126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:09,977 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:09,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 04:07:09,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260360173] [2022-02-24 04:07:09,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:09,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-24 04:07:09,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-24 04:07:09,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=5541, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 04:07:09,979 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 76 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:07:38,351 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2022-02-24 04:07:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-24 04:07:38,351 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-24 04:07:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:07:38,352 INFO L225 Difference]: With dead ends: 87 [2022-02-24 04:07:38,352 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 04:07:38,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=471, Invalid=21581, Unknown=0, NotChecked=0, Total=22052 [2022-02-24 04:07:38,354 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 5400 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 5472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 5400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:07:38,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 366 Invalid, 5472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 5400 Invalid, 0 Unknown, 0 Unchecked, 25.5s Time] [2022-02-24 04:07:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 04:07:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-24 04:07:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-02-24 04:07:38,359 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2022-02-24 04:07:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:07:38,359 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-02-24 04:07:38,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:07:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-02-24 04:07:38,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 04:07:38,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:07:38,360 INFO L514 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:07:38,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 04:07:38,360 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:07:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:07:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1467550586, now seen corresponding path program 69 times [2022-02-24 04:07:38,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:07:38,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654569636] [2022-02-24 04:07:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:07:38,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:07:38,550 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:07:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:38,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:07:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:07:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:07:41,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:07:41,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654569636] [2022-02-24 04:07:41,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1654569636] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:07:41,007 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:07:41,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-24 04:07:41,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846018354] [2022-02-24 04:07:41,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:07:41,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 04:07:41,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:07:41,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 04:07:41,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=5691, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 04:07:41,008 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 77 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:08:07,839 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-02-24 04:08:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 04:08:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-02-24 04:08:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:08:07,842 INFO L225 Difference]: With dead ends: 88 [2022-02-24 04:08:07,842 INFO L226 Difference]: Without dead ends: 83 [2022-02-24 04:08:07,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=477, Invalid=22173, Unknown=0, NotChecked=0, Total=22650 [2022-02-24 04:08:07,844 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 5625 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 5698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 5625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:08:07,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 376 Invalid, 5698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 5625 Invalid, 0 Unknown, 0 Unchecked, 23.8s Time] [2022-02-24 04:08:07,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-24 04:08:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-02-24 04:08:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-02-24 04:08:07,849 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2022-02-24 04:08:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:08:07,849 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-02-24 04:08:07,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-02-24 04:08:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 04:08:07,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:08:07,850 INFO L514 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:08:07,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 04:08:07,850 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:08:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:08:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1785960920, now seen corresponding path program 70 times [2022-02-24 04:08:07,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:08:07,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540685258] [2022-02-24 04:08:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:08:07,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:08:07,948 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:08:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:07,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:08:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:07,977 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 04:08:10,615 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:10,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540685258] [2022-02-24 04:08:10,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1540685258] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:10,615 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:10,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 04:08:10,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413089536] [2022-02-24 04:08:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:10,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 04:08:10,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 04:08:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=5843, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 04:08:10,617 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 78 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:08:52,280 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-02-24 04:08:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-24 04:08:52,281 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-24 04:08:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:08:52,281 INFO L225 Difference]: With dead ends: 89 [2022-02-24 04:08:52,281 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 04:08:52,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=483, Invalid=22773, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 04:08:52,283 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 5545 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 5619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 5545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:08:52,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 366 Invalid, 5619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 5545 Invalid, 0 Unknown, 0 Unchecked, 38.7s Time] [2022-02-24 04:08:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 04:08:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-02-24 04:08:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-02-24 04:08:52,287 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2022-02-24 04:08:52,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:08:52,287 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-02-24 04:08:52,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:08:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-02-24 04:08:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 04:08:52,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:08:52,296 INFO L514 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:08:52,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 04:08:52,296 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:08:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:08:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash -434397498, now seen corresponding path program 71 times [2022-02-24 04:08:52,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:08:52,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876085647] [2022-02-24 04:08:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:08:52,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:08:52,446 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:08:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:52,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:08:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:08:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:08:54,887 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:08:54,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876085647] [2022-02-24 04:08:54,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876085647] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:08:54,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:08:54,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 04:08:54,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571315638] [2022-02-24 04:08:54,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:08:54,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 04:08:54,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:08:54,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 04:08:54,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=5997, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 04:08:54,889 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 79 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:40,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:09:40,173 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-02-24 04:09:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 04:09:40,173 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-24 04:09:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:09:40,174 INFO L225 Difference]: With dead ends: 90 [2022-02-24 04:09:40,174 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 04:09:40,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3130 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=489, Invalid=23381, Unknown=0, NotChecked=0, Total=23870 [2022-02-24 04:09:40,175 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 5775 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 5850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 5775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:09:40,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 376 Invalid, 5850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 5775 Invalid, 0 Unknown, 0 Unchecked, 41.9s Time] [2022-02-24 04:09:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 04:09:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-24 04:09:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-02-24 04:09:40,179 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2022-02-24 04:09:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:09:40,179 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-02-24 04:09:40,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:09:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-02-24 04:09:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 04:09:40,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:40,180 INFO L514 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:40,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 04:09:40,180 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash -546031720, now seen corresponding path program 72 times [2022-02-24 04:09:40,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:40,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330767904] [2022-02-24 04:09:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:40,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:40,303 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:09:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:40,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:09:43,252 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:09:43,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330767904] [2022-02-24 04:09:43,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [330767904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:09:43,253 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:09:43,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 04:09:43,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362483331] [2022-02-24 04:09:43,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:09:43,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-24 04:09:43,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:09:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-24 04:09:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6153, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 04:09:43,254 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 80 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:17,961 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2022-02-24 04:10:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-24 04:10:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-02-24 04:10:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:17,962 INFO L225 Difference]: With dead ends: 91 [2022-02-24 04:10:17,963 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 04:10:17,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3210 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=495, Invalid=23997, Unknown=0, NotChecked=0, Total=24492 [2022-02-24 04:10:17,967 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 5926 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 6002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 5926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:17,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 381 Invalid, 6002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 5926 Invalid, 0 Unknown, 0 Unchecked, 31.8s Time] [2022-02-24 04:10:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 04:10:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-02-24 04:10:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-02-24 04:10:17,972 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2022-02-24 04:10:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:17,972 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-02-24 04:10:17,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-02-24 04:10:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 04:10:17,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:17,973 INFO L514 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:17,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 04:10:17,973 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:17,974 INFO L85 PathProgramCache]: Analyzing trace with hash 288274694, now seen corresponding path program 73 times [2022-02-24 04:10:17,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:17,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877364115] [2022-02-24 04:10:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:17,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:18,137 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:10:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:18,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:10:20,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:20,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877364115] [2022-02-24 04:10:20,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877364115] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:20,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:20,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-24 04:10:20,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515491061] [2022-02-24 04:10:20,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:20,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 04:10:20,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 04:10:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=6311, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 04:10:20,666 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 81 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:54,803 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-02-24 04:10:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 04:10:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-24 04:10:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:54,804 INFO L225 Difference]: With dead ends: 92 [2022-02-24 04:10:54,804 INFO L226 Difference]: Without dead ends: 87 [2022-02-24 04:10:54,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3291 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=501, Invalid=24621, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 04:10:54,805 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 6083 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 6160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 6083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:54,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 386 Invalid, 6160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 6083 Invalid, 0 Unknown, 0 Unchecked, 30.8s Time] [2022-02-24 04:10:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-24 04:10:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-02-24 04:10:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-02-24 04:10:54,809 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2022-02-24 04:10:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:54,809 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-02-24 04:10:54,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:10:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-02-24 04:10:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 04:10:54,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:54,809 INFO L514 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:54,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 04:10:54,810 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:54,810 INFO L85 PathProgramCache]: Analyzing trace with hash 381969752, now seen corresponding path program 74 times [2022-02-24 04:10:54,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:54,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619538731] [2022-02-24 04:10:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:54,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:54,960 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:10:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:10:58,102 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:58,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619538731] [2022-02-24 04:10:58,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1619538731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:58,102 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:58,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 04:10:58,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124218004] [2022-02-24 04:10:58,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:58,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-24 04:10:58,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:58,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-24 04:10:58,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=6471, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 04:10:58,104 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 82 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:11:33,154 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-02-24 04:11:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-24 04:11:33,155 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-24 04:11:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:11:33,155 INFO L225 Difference]: With dead ends: 93 [2022-02-24 04:11:33,155 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 04:11:33,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=507, Invalid=25253, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 04:11:33,156 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 6319 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 6397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 6319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:11:33,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 396 Invalid, 6397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 6319 Invalid, 0 Unknown, 0 Unchecked, 31.6s Time] [2022-02-24 04:11:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 04:11:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-02-24 04:11:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-02-24 04:11:33,160 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2022-02-24 04:11:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:11:33,160 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-02-24 04:11:33,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:11:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-02-24 04:11:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-24 04:11:33,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:11:33,160 INFO L514 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:11:33,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 04:11:33,160 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:11:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:11:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1008450746, now seen corresponding path program 75 times [2022-02-24 04:11:33,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:11:33,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546948759] [2022-02-24 04:11:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:11:33,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:11:33,300 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:11:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:33,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:11:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:11:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:11:36,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:11:36,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546948759] [2022-02-24 04:11:36,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [546948759] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:11:36,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:11:36,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-24 04:11:36,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982285469] [2022-02-24 04:11:36,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:11:36,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 04:11:36,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:11:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 04:11:36,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=6633, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 04:11:36,358 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 83 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:12:49,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:12:49,831 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-02-24 04:12:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 04:12:49,832 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-02-24 04:12:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:12:49,833 INFO L225 Difference]: With dead ends: 94 [2022-02-24 04:12:49,833 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 04:12:49,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3456 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=513, Invalid=25893, Unknown=0, NotChecked=0, Total=26406 [2022-02-24 04:12:49,835 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 6398 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 6477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 6398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:12:49,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 396 Invalid, 6477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 6398 Invalid, 0 Unknown, 0 Unchecked, 70.0s Time] [2022-02-24 04:12:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 04:12:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-02-24 04:12:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:12:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-02-24 04:12:49,848 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2022-02-24 04:12:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:12:49,848 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-02-24 04:12:49,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:12:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-02-24 04:12:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 04:12:49,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:12:49,848 INFO L514 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:12:49,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 04:12:49,849 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:12:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:12:49,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1161813224, now seen corresponding path program 76 times [2022-02-24 04:12:49,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:12:49,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231696500] [2022-02-24 04:12:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:12:49,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:12:49,997 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:12:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:50,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:12:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:12:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:12:53,241 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:12:53,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231696500] [2022-02-24 04:12:53,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1231696500] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:12:53,241 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:12:53,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 04:12:53,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995314383] [2022-02-24 04:12:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:12:53,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-24 04:12:53,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:12:53,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-24 04:12:53,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=6797, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 04:12:53,243 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 84 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:13:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:13:51,937 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-02-24 04:13:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-24 04:13:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-02-24 04:13:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:13:51,939 INFO L225 Difference]: With dead ends: 95 [2022-02-24 04:13:51,939 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 04:13:51,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=519, Invalid=26541, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 04:13:51,940 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 6476 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 6556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 6476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:13:51,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 396 Invalid, 6556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 6476 Invalid, 0 Unknown, 0 Unchecked, 55.3s Time] [2022-02-24 04:13:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 04:13:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-02-24 04:13:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:13:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-02-24 04:13:51,945 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2022-02-24 04:13:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:13:51,946 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-02-24 04:13:51,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:13:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-02-24 04:13:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 04:13:51,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:13:51,946 INFO L514 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:13:51,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 04:13:51,947 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:13:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:13:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1621082746, now seen corresponding path program 77 times [2022-02-24 04:13:51,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:13:51,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437541374] [2022-02-24 04:13:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:13:51,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:13:52,113 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:13:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:52,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:13:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:13:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:13:54,683 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:13:54,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437541374] [2022-02-24 04:13:54,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1437541374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:13:54,684 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:13:54,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-24 04:13:54,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22308979] [2022-02-24 04:13:54,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:13:54,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-24 04:13:54,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:13:54,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-24 04:13:54,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=6963, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 04:13:54,685 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 85 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:15:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:05,785 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-02-24 04:15:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-24 04:15:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-24 04:15:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:05,787 INFO L225 Difference]: With dead ends: 96 [2022-02-24 04:15:05,787 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 04:15:05,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3625 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=525, Invalid=27197, Unknown=0, NotChecked=0, Total=27722 [2022-02-24 04:15:05,789 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 6806 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 6887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 6806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:05,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 411 Invalid, 6887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 6806 Invalid, 0 Unknown, 0 Unchecked, 67.7s Time] [2022-02-24 04:15:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 04:15:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-02-24 04:15:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:15:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-02-24 04:15:05,794 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2022-02-24 04:15:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:05,795 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-02-24 04:15:05,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:15:05,807 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-02-24 04:15:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-24 04:15:05,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:05,808 INFO L514 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:05,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 04:15:05,808 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1321431256, now seen corresponding path program 78 times [2022-02-24 04:15:05,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:05,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338492040] [2022-02-24 04:15:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:05,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:06,002 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:15:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:10,085 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:10,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338492040] [2022-02-24 04:15:10,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [338492040] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:10,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:10,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-24 04:15:10,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459827755] [2022-02-24 04:15:10,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:10,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-24 04:15:10,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:10,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-24 04:15:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=7131, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 04:15:10,087 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 86 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:16:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:27,846 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2022-02-24 04:16:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-24 04:16:27,846 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-02-24 04:16:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:27,847 INFO L225 Difference]: With dead ends: 97 [2022-02-24 04:16:27,847 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 04:16:27,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3711 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=531, Invalid=27861, Unknown=0, NotChecked=0, Total=28392 [2022-02-24 04:16:27,848 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 6803 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 6885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 6803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:27,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 406 Invalid, 6885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 6803 Invalid, 0 Unknown, 0 Unchecked, 73.6s Time] [2022-02-24 04:16:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 04:16:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-02-24 04:16:27,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:16:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-02-24 04:16:27,852 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2022-02-24 04:16:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:27,852 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-02-24 04:16:27,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:16:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-02-24 04:16:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 04:16:27,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:27,853 INFO L514 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:16:27,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 04:16:27,853 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1949915194, now seen corresponding path program 79 times [2022-02-24 04:16:27,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:27,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265179126] [2022-02-24 04:16:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:28,036 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:16:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:28,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:30,657 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:30,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265179126] [2022-02-24 04:16:30,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [265179126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:30,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:30,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-24 04:16:30,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103892568] [2022-02-24 04:16:30,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:30,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 04:16:30,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:30,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 04:16:30,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=7301, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 04:16:30,659 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 87 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)