/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:27:06,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:27:06,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:27:06,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:27:06,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:27:06,536 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:27:06,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:27:06,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:27:06,538 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:27:06,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:27:06,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:27:06,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:27:06,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:27:06,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:27:06,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:27:06,539 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:27:06,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:27:06,539 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:27:06,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:27:06,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:27:06,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:27:06,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:27:06,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:27:06,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:27:06,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:27:06,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:27:06,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:27:06,540 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:27:06,540 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:27:06,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:27:06,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:27:06,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:27:06,780 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:27:06,780 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:27:06,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2022-02-15 01:27:06,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ab15c086/e506b9283a654c4196448668ac680dfc/FLAGdabbda2b3 [2022-02-15 01:27:07,129 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:27:07,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2022-02-15 01:27:07,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ab15c086/e506b9283a654c4196448668ac680dfc/FLAGdabbda2b3 [2022-02-15 01:27:07,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ab15c086/e506b9283a654c4196448668ac680dfc [2022-02-15 01:27:07,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:27:07,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:27:07,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:27:07,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:27:07,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:27:07,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b7a450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07, skipping insertion in model container [2022-02-15 01:27:07,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:27:07,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:27:07,656 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-crafted/simple_array_index_value_1-1.i[834,847] [2022-02-15 01:27:07,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:27:07,675 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:27:07,693 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-crafted/simple_array_index_value_1-1.i[834,847] [2022-02-15 01:27:07,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:27:07,733 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:27:07,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07 WrapperNode [2022-02-15 01:27:07,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:27:07,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:27:07,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:27:07,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:27:07,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:27:07,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:27:07,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:27:07,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:27:07,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07" (1/1) ... [2022-02-15 01:27:07,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:27:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:27:07,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:27:07,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:27:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:27:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:27:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:27:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:27:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:27:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:27:07,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:27:07,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:27:07,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:27:07,873 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:27:07,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:27:07,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:27:07,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:27:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:27:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:27:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:27:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:27:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:27:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:27:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:27:07,919 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:27:07,920 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:27:08,062 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:27:08,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:27:08,075 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 01:27:08,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:27:08 BoogieIcfgContainer [2022-02-15 01:27:08,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:27:08,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:27:08,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:27:08,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:27:08,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:27:07" (1/3) ... [2022-02-15 01:27:08,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f062f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:27:08, skipping insertion in model container [2022-02-15 01:27:08,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:07" (2/3) ... [2022-02-15 01:27:08,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f062f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:27:08, skipping insertion in model container [2022-02-15 01:27:08,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:27:08" (3/3) ... [2022-02-15 01:27:08,082 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2022-02-15 01:27:08,086 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:27:08,086 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:27:08,140 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:27:08,145 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:27:08,146 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:27:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:27:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:27:08,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:08,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:08,179 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash 56847072, now seen corresponding path program 1 times [2022-02-15 01:27:08,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:08,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584130696] [2022-02-15 01:27:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:08,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:08,244 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:08,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:08,354 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:08,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584130696] [2022-02-15 01:27:08,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [584130696] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:08,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:08,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:27:08,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639725249] [2022-02-15 01:27:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:08,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:27:08,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:08,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:27:08,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:27:08,384 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2022-02-15 01:27:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:08,435 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-02-15 01:27:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:27:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 [2022-02-15 01:27:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:08,443 INFO L225 Difference]: With dead ends: 46 [2022-02-15 01:27:08,444 INFO L226 Difference]: Without dead ends: 22 [2022-02-15 01:27:08,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:27:08,459 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:08,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:27:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-15 01:27:08,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-02-15 01:27:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-02-15 01:27:08,494 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-02-15 01:27:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:08,495 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-02-15 01:27:08,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2022-02-15 01:27:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-02-15 01:27:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:27:08,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:08,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:08,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:27:08,497 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:08,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1810080346, now seen corresponding path program 1 times [2022-02-15 01:27:08,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:08,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881142532] [2022-02-15 01:27:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:08,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:08,504 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:08,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:08,585 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:08,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881142532] [2022-02-15 01:27:08,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881142532] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:08,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:08,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:27:08,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094844940] [2022-02-15 01:27:08,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:08,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:27:08,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:27:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:27:08,587 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-02-15 01:27:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:08,656 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-02-15 01:27:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:27:08,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2022-02-15 01:27:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:08,658 INFO L225 Difference]: With dead ends: 43 [2022-02-15 01:27:08,658 INFO L226 Difference]: Without dead ends: 29 [2022-02-15 01:27:08,658 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 [2022-02-15 01:27:08,659 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:08,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-15 01:27:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-02-15 01:27:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-02-15 01:27:08,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-02-15 01:27:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:08,667 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-02-15 01:27:08,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-02-15 01:27:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-02-15 01:27:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 01:27:08,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:08,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:08,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:27:08,670 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1733475192, now seen corresponding path program 1 times [2022-02-15 01:27:08,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:08,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058268026] [2022-02-15 01:27:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:08,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:08,690 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:08,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:08,693 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:08,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:08,761 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:08,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058268026] [2022-02-15 01:27:08,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058268026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:08,762 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:08,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:27:08,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239237413] [2022-02-15 01:27:08,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:08,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:27:08,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:27:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:27:08,763 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-02-15 01:27:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:08,867 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-02-15 01:27:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:27:08,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2022-02-15 01:27:08,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:08,868 INFO L225 Difference]: With dead ends: 52 [2022-02-15 01:27:08,868 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 01:27:08,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:27:08,869 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:08,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 29 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 01:27:08,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-02-15 01:27:08,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-15 01:27:08,884 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 16 [2022-02-15 01:27:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:08,885 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-15 01:27:08,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-02-15 01:27:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-15 01:27:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 01:27:08,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:08,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:08,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:27:08,886 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1130366230, now seen corresponding path program 2 times [2022-02-15 01:27:08,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:08,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103696266] [2022-02-15 01:27:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:08,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:08,889 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:08,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:08,890 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:08,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:09,006 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:09,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103696266] [2022-02-15 01:27:09,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2103696266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:09,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:09,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:27:09,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766774948] [2022-02-15 01:27:09,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:09,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:27:09,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:27:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:27:09,008 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2022-02-15 01:27:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:09,184 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-02-15 01:27:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:27:09,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 [2022-02-15 01:27:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:09,185 INFO L225 Difference]: With dead ends: 59 [2022-02-15 01:27:09,185 INFO L226 Difference]: Without dead ends: 43 [2022-02-15 01:27:09,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:27:09,187 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:09,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-15 01:27:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2022-02-15 01:27:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:27:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-02-15 01:27:09,197 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2022-02-15 01:27:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:09,197 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-02-15 01:27:09,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2022-02-15 01:27:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-02-15 01:27:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:27:09,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:09,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:09,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:27:09,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:09,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1363238708, now seen corresponding path program 3 times [2022-02-15 01:27:09,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:09,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323940661] [2022-02-15 01:27:09,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:09,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:09,201 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:09,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:09,202 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:09,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:09,314 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:09,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323940661] [2022-02-15 01:27:09,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [323940661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:09,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:09,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:27:09,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971630307] [2022-02-15 01:27:09,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:09,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:27:09,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:27:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:27:09,316 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2022-02-15 01:27:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:09,483 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-02-15 01:27:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:27:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 [2022-02-15 01:27:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:09,484 INFO L225 Difference]: With dead ends: 73 [2022-02-15 01:27:09,484 INFO L226 Difference]: Without dead ends: 52 [2022-02-15 01:27:09,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:27:09,486 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:09,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 41 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-15 01:27:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-02-15 01:27:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:27:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-02-15 01:27:09,508 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 20 [2022-02-15 01:27:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:09,508 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-02-15 01:27:09,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2022-02-15 01:27:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-02-15 01:27:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:27:09,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:09,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:09,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:27:09,509 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1815390674, now seen corresponding path program 4 times [2022-02-15 01:27:09,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:09,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400533327] [2022-02-15 01:27:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:09,512 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:09,512 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:09,513 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:09,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:09,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400533327] [2022-02-15 01:27:09,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [400533327] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:09,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:09,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:27:09,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335053934] [2022-02-15 01:27:09,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:09,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:27:09,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:27:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:27:09,600 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2022-02-15 01:27:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:09,784 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2022-02-15 01:27:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:27:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 [2022-02-15 01:27:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:09,785 INFO L225 Difference]: With dead ends: 85 [2022-02-15 01:27:09,786 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 01:27:09,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:27:09,790 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:09,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 48 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:09,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 01:27:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2022-02-15 01:27:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:27:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-02-15 01:27:09,801 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2022-02-15 01:27:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:09,802 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-02-15 01:27:09,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2022-02-15 01:27:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-02-15 01:27:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:27:09,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:09,802 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:09,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:27:09,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:09,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:09,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1753234192, now seen corresponding path program 5 times [2022-02-15 01:27:09,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:09,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822028627] [2022-02-15 01:27:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:09,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:09,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:09,806 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:09,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:09,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:09,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822028627] [2022-02-15 01:27:09,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822028627] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:09,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:09,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:27:09,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372416952] [2022-02-15 01:27:09,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:09,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:27:09,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:09,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:27:09,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:27:09,938 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-15 01:27:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:10,186 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2022-02-15 01:27:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:27:10,187 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 [2022-02-15 01:27:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:10,187 INFO L225 Difference]: With dead ends: 97 [2022-02-15 01:27:10,187 INFO L226 Difference]: Without dead ends: 66 [2022-02-15 01:27:10,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:27:10,188 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 68 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:10,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 55 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:27:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-15 01:27:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-02-15 01:27:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 01:27:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-02-15 01:27:10,205 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 24 [2022-02-15 01:27:10,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:10,205 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-02-15 01:27:10,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-15 01:27:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-02-15 01:27:10,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:27:10,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:10,206 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:10,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:27:10,206 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:10,206 INFO L85 PathProgramCache]: Analyzing trace with hash -477139086, now seen corresponding path program 6 times [2022-02-15 01:27:10,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:10,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595727657] [2022-02-15 01:27:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:10,210 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:10,211 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:10,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:10,212 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:10,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:10,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:10,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595727657] [2022-02-15 01:27:10,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1595727657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:10,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:10,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:27:10,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423904319] [2022-02-15 01:27:10,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:10,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:27:10,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:27:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:27:10,374 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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) [2022-02-15 01:27:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:10,676 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2022-02-15 01:27:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:27:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 [2022-02-15 01:27:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:10,678 INFO L225 Difference]: With dead ends: 109 [2022-02-15 01:27:10,678 INFO L226 Difference]: Without dead ends: 73 [2022-02-15 01:27:10,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:27:10,682 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:10,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 47 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:27:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-15 01:27:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2022-02-15 01:27:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 01:27:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-02-15 01:27:10,708 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 26 [2022-02-15 01:27:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:10,710 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-02-15 01:27:10,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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) [2022-02-15 01:27:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-02-15 01:27:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:27:10,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:10,712 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:10,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:27:10,712 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:10,712 INFO L85 PathProgramCache]: Analyzing trace with hash -677178540, now seen corresponding path program 7 times [2022-02-15 01:27:10,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:10,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720992027] [2022-02-15 01:27:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:10,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:10,717 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:10,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:10,718 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:10,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:10,884 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:10,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720992027] [2022-02-15 01:27:10,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [720992027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:10,884 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:10,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:27:10,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104126681] [2022-02-15 01:27:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:10,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:27:10,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:27:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:27:10,885 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2022-02-15 01:27:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:11,190 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2022-02-15 01:27:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:27:11,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 [2022-02-15 01:27:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:11,191 INFO L225 Difference]: With dead ends: 121 [2022-02-15 01:27:11,191 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:27:11,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:27:11,192 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 93 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:11,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 54 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:27:11,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:27:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2022-02-15 01:27:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-15 01:27:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-02-15 01:27:11,206 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 28 [2022-02-15 01:27:11,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:11,207 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-02-15 01:27:11,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2022-02-15 01:27:11,207 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-02-15 01:27:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:27:11,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:11,210 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:11,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:27:11,210 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash 358434486, now seen corresponding path program 8 times [2022-02-15 01:27:11,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:11,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303647306] [2022-02-15 01:27:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:11,212 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:11,212 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:11,213 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:11,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:11,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:11,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303647306] [2022-02-15 01:27:11,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [303647306] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:11,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:11,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:27:11,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236645582] [2022-02-15 01:27:11,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:11,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:27:11,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:27:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:27:11,323 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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) [2022-02-15 01:27:11,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:11,664 INFO L93 Difference]: Finished difference Result 133 states and 157 transitions. [2022-02-15 01:27:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:27:11,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 [2022-02-15 01:27:11,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:11,665 INFO L225 Difference]: With dead ends: 133 [2022-02-15 01:27:11,665 INFO L226 Difference]: Without dead ends: 87 [2022-02-15 01:27:11,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:27:11,666 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:11,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 56 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:27:11,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-15 01:27:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2022-02-15 01:27:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-15 01:27:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-02-15 01:27:11,679 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 30 [2022-02-15 01:27:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:11,679 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-02-15 01:27:11,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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) [2022-02-15 01:27:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-02-15 01:27:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:27:11,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:11,679 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:11,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:27:11,680 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash -849860200, now seen corresponding path program 9 times [2022-02-15 01:27:11,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:11,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876266803] [2022-02-15 01:27:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:11,682 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:11,682 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:11,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:11,683 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:11,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:11,821 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:11,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876266803] [2022-02-15 01:27:11,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [876266803] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:11,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:11,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:27:11,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683809948] [2022-02-15 01:27:11,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:11,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:27:11,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:27:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:27:11,822 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2022-02-15 01:27:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:12,249 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2022-02-15 01:27:12,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:27:12,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-02-15 01:27:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:12,250 INFO L225 Difference]: With dead ends: 145 [2022-02-15 01:27:12,250 INFO L226 Difference]: Without dead ends: 94 [2022-02-15 01:27:12,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:27:12,251 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 106 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:12,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 73 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:27:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-15 01:27:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2022-02-15 01:27:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-15 01:27:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-02-15 01:27:12,265 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 32 [2022-02-15 01:27:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:12,265 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-02-15 01:27:12,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2022-02-15 01:27:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-02-15 01:27:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:27:12,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:12,266 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:12,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:27:12,266 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:12,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:12,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1915083770, now seen corresponding path program 10 times [2022-02-15 01:27:12,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:12,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414174067] [2022-02-15 01:27:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:12,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:12,269 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:12,270 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:12,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:12,404 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:12,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414174067] [2022-02-15 01:27:12,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [414174067] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:12,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:12,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:27:12,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770906355] [2022-02-15 01:27:12,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:12,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:27:12,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:27:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:27:12,406 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2022-02-15 01:27:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:12,883 INFO L93 Difference]: Finished difference Result 157 states and 185 transitions. [2022-02-15 01:27:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:27:12,883 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 [2022-02-15 01:27:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:12,884 INFO L225 Difference]: With dead ends: 157 [2022-02-15 01:27:12,884 INFO L226 Difference]: Without dead ends: 101 [2022-02-15 01:27:12,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:27:12,885 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 120 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:12,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 70 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:27:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-15 01:27:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2022-02-15 01:27:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-15 01:27:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2022-02-15 01:27:12,918 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 34 [2022-02-15 01:27:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:12,919 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2022-02-15 01:27:12,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2022-02-15 01:27:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2022-02-15 01:27:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:27:12,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:12,919 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:12,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:27:12,920 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash 441482716, now seen corresponding path program 11 times [2022-02-15 01:27:12,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:12,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890524216] [2022-02-15 01:27:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:12,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:12,922 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:12,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:12,923 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:13,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:13,084 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:13,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890524216] [2022-02-15 01:27:13,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [890524216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:13,084 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:13,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:27:13,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351403164] [2022-02-15 01:27:13,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:13,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:27:13,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:27:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:27:13,086 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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) [2022-02-15 01:27:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:13,662 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2022-02-15 01:27:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:27:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 [2022-02-15 01:27:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:13,664 INFO L225 Difference]: With dead ends: 169 [2022-02-15 01:27:13,664 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 01:27:13,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:27:13,665 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 116 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:13,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 97 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:27:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 01:27:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2022-02-15 01:27:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-15 01:27:13,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2022-02-15 01:27:13,681 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 36 [2022-02-15 01:27:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:13,681 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2022-02-15 01:27:13,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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) [2022-02-15 01:27:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2022-02-15 01:27:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:27:13,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:13,682 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:13,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:27:13,682 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1650077502, now seen corresponding path program 12 times [2022-02-15 01:27:13,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:13,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026473176] [2022-02-15 01:27:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:13,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:13,684 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:13,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:13,685 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:13,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:13,846 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:13,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026473176] [2022-02-15 01:27:13,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026473176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:13,846 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:13,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:27:13,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581649744] [2022-02-15 01:27:13,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:13,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:27:13,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:13,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:27:13,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:27:13,847 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2022-02-15 01:27:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:14,537 INFO L93 Difference]: Finished difference Result 181 states and 213 transitions. [2022-02-15 01:27:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:27:14,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 [2022-02-15 01:27:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:14,538 INFO L225 Difference]: With dead ends: 181 [2022-02-15 01:27:14,538 INFO L226 Difference]: Without dead ends: 115 [2022-02-15 01:27:14,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:27:14,539 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:14,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 89 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:27:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-15 01:27:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2022-02-15 01:27:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-15 01:27:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2022-02-15 01:27:14,555 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 38 [2022-02-15 01:27:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:14,555 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2022-02-15 01:27:14,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2022-02-15 01:27:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2022-02-15 01:27:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:27:14,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:14,555 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:14,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:27:14,556 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash -826470368, now seen corresponding path program 13 times [2022-02-15 01:27:14,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:14,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98606481] [2022-02-15 01:27:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:14,558 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:14,558 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:14,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:14,559 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:14,744 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:14,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98606481] [2022-02-15 01:27:14,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [98606481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:14,744 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:14,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:27:14,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52803874] [2022-02-15 01:27:14,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:14,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:27:14,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:14,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:27:14,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:27:14,745 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2022-02-15 01:27:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:15,593 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2022-02-15 01:27:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:27:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 [2022-02-15 01:27:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:15,594 INFO L225 Difference]: With dead ends: 193 [2022-02-15 01:27:15,594 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:27:15,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:27:15,595 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 132 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:15,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 111 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:27:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:27:15,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2022-02-15 01:27:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-15 01:27:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-02-15 01:27:15,616 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 40 [2022-02-15 01:27:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:15,616 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-02-15 01:27:15,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2022-02-15 01:27:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-02-15 01:27:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:27:15,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:15,618 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:15,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:27:15,618 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1377091454, now seen corresponding path program 14 times [2022-02-15 01:27:15,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:15,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052865781] [2022-02-15 01:27:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:15,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:15,623 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:15,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:15,624 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:15,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:15,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:15,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052865781] [2022-02-15 01:27:15,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1052865781] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:15,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:15,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:27:15,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971216671] [2022-02-15 01:27:15,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:15,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:27:15,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:27:15,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:27:15,856 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2022-02-15 01:27:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:16,756 INFO L93 Difference]: Finished difference Result 205 states and 241 transitions. [2022-02-15 01:27:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:27:16,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 [2022-02-15 01:27:16,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:16,757 INFO L225 Difference]: With dead ends: 205 [2022-02-15 01:27:16,757 INFO L226 Difference]: Without dead ends: 129 [2022-02-15 01:27:16,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:27:16,758 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 161 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:16,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 83 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1603 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:27:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-15 01:27:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2022-02-15 01:27:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 01:27:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2022-02-15 01:27:16,796 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 42 [2022-02-15 01:27:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:16,796 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2022-02-15 01:27:16,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2022-02-15 01:27:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2022-02-15 01:27:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:27:16,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:16,797 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:16,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:27:16,797 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2051989604, now seen corresponding path program 15 times [2022-02-15 01:27:16,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:16,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085459634] [2022-02-15 01:27:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:16,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:16,799 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:16,800 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:17,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:17,022 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:17,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085459634] [2022-02-15 01:27:17,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085459634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:17,022 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:17,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:27:17,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488044656] [2022-02-15 01:27:17,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:17,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:27:17,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:27:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:27:17,023 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2022-02-15 01:27:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:18,024 INFO L93 Difference]: Finished difference Result 217 states and 255 transitions. [2022-02-15 01:27:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:27:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 [2022-02-15 01:27:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:18,025 INFO L225 Difference]: With dead ends: 217 [2022-02-15 01:27:18,025 INFO L226 Difference]: Without dead ends: 136 [2022-02-15 01:27:18,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:27:18,026 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 151 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:18,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 120 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:27:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-15 01:27:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 125. [2022-02-15 01:27:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 01:27:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2022-02-15 01:27:18,066 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 44 [2022-02-15 01:27:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:18,067 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2022-02-15 01:27:18,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2022-02-15 01:27:18,076 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2022-02-15 01:27:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:27:18,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:18,076 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:18,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:27:18,077 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1135996986, now seen corresponding path program 16 times [2022-02-15 01:27:18,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:18,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937601658] [2022-02-15 01:27:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:18,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:18,080 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:18,083 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:18,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:18,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:18,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937601658] [2022-02-15 01:27:18,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [937601658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:18,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:18,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:27:18,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284434507] [2022-02-15 01:27:18,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:18,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:27:18,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:27:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:27:18,362 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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) [2022-02-15 01:27:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:19,395 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2022-02-15 01:27:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:27:19,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 [2022-02-15 01:27:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:19,396 INFO L225 Difference]: With dead ends: 229 [2022-02-15 01:27:19,396 INFO L226 Difference]: Without dead ends: 143 [2022-02-15 01:27:19,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:27:19,397 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 183 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:19,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 87 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2045 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:27:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-15 01:27:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 132. [2022-02-15 01:27:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 19 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 01:27:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2022-02-15 01:27:19,417 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 46 [2022-02-15 01:27:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:19,417 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2022-02-15 01:27:19,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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) [2022-02-15 01:27:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2022-02-15 01:27:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:27:19,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:19,418 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:19,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:27:19,418 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:19,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1815539368, now seen corresponding path program 17 times [2022-02-15 01:27:19,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:19,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499938997] [2022-02-15 01:27:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:19,420 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:19,420 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:19,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:19,421 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:19,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:19,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:19,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499938997] [2022-02-15 01:27:19,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499938997] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:19,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:19,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:27:19,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457806694] [2022-02-15 01:27:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:19,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:27:19,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:27:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:27:19,716 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2022-02-15 01:27:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:20,527 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2022-02-15 01:27:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:27:20,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 [2022-02-15 01:27:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:20,528 INFO L225 Difference]: With dead ends: 241 [2022-02-15 01:27:20,528 INFO L226 Difference]: Without dead ends: 150 [2022-02-15 01:27:20,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:27:20,530 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 164 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:20,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 139 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:27:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-15 01:27:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2022-02-15 01:27:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 01:27:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2022-02-15 01:27:20,561 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 48 [2022-02-15 01:27:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:20,561 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2022-02-15 01:27:20,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2022-02-15 01:27:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2022-02-15 01:27:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:27:20,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:20,562 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:20,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:27:20,562 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash -731407094, now seen corresponding path program 18 times [2022-02-15 01:27:20,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:20,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213946307] [2022-02-15 01:27:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:20,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:20,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:20,582 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:20,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:20,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:20,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213946307] [2022-02-15 01:27:20,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213946307] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:20,912 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:20,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:27:20,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341391744] [2022-02-15 01:27:20,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:20,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:27:20,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:27:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:27:20,913 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2022-02-15 01:27:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:21,944 INFO L93 Difference]: Finished difference Result 253 states and 297 transitions. [2022-02-15 01:27:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:27:21,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 [2022-02-15 01:27:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:21,945 INFO L225 Difference]: With dead ends: 253 [2022-02-15 01:27:21,945 INFO L226 Difference]: Without dead ends: 157 [2022-02-15 01:27:21,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:27:21,947 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 220 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:21,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 66 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:27:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-15 01:27:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2022-02-15 01:27:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 21 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-15 01:27:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2022-02-15 01:27:21,995 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 50 [2022-02-15 01:27:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:21,995 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2022-02-15 01:27:21,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2022-02-15 01:27:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2022-02-15 01:27:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:27:21,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:21,996 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:21,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:27:21,996 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash -215598356, now seen corresponding path program 19 times [2022-02-15 01:27:21,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:21,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083305708] [2022-02-15 01:27:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:21,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:21,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:21,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:21,999 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:22,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:22,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:22,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083305708] [2022-02-15 01:27:22,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083305708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:22,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:22,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:27:22,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574609229] [2022-02-15 01:27:22,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:22,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:27:22,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:27:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:27:22,248 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2022-02-15 01:27:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:23,166 INFO L93 Difference]: Finished difference Result 265 states and 311 transitions. [2022-02-15 01:27:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:27:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 [2022-02-15 01:27:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:23,175 INFO L225 Difference]: With dead ends: 265 [2022-02-15 01:27:23,175 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:27:23,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:27:23,177 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 228 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:23,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 73 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:27:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:27:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2022-02-15 01:27:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 01:27:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2022-02-15 01:27:23,263 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 52 [2022-02-15 01:27:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:23,263 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2022-02-15 01:27:23,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2022-02-15 01:27:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2022-02-15 01:27:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:27:23,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:23,264 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:23,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:27:23,264 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1555359822, now seen corresponding path program 20 times [2022-02-15 01:27:23,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:23,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82372514] [2022-02-15 01:27:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:23,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:23,266 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:23,280 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:23,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:23,532 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:23,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82372514] [2022-02-15 01:27:23,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [82372514] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:23,532 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:23,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:27:23,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313246328] [2022-02-15 01:27:23,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:23,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:27:23,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:27:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:27:23,533 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2022-02-15 01:27:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:24,526 INFO L93 Difference]: Finished difference Result 277 states and 325 transitions. [2022-02-15 01:27:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:27:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 [2022-02-15 01:27:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:24,538 INFO L225 Difference]: With dead ends: 277 [2022-02-15 01:27:24,539 INFO L226 Difference]: Without dead ends: 171 [2022-02-15 01:27:24,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:27:24,540 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 233 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:24,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 85 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3041 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:27:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-15 01:27:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2022-02-15 01:27:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 01:27:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2022-02-15 01:27:24,594 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 54 [2022-02-15 01:27:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:24,594 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2022-02-15 01:27:24,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2022-02-15 01:27:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2022-02-15 01:27:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:27:24,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:24,595 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:24,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:27:24,595 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1655847632, now seen corresponding path program 21 times [2022-02-15 01:27:24,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:24,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353906648] [2022-02-15 01:27:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:24,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:24,607 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:24,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:24,608 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:24,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:24,866 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:24,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353906648] [2022-02-15 01:27:24,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [353906648] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:24,866 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:24,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:27:24,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052266763] [2022-02-15 01:27:24,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:24,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:27:24,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:24,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:27:24,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:27:24,867 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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) [2022-02-15 01:27:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:26,006 INFO L93 Difference]: Finished difference Result 289 states and 339 transitions. [2022-02-15 01:27:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:27:26,006 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 [2022-02-15 01:27:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:26,007 INFO L225 Difference]: With dead ends: 289 [2022-02-15 01:27:26,007 INFO L226 Difference]: Without dead ends: 178 [2022-02-15 01:27:26,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:27:26,008 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 241 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3366 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 3366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:26,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 92 Invalid, 3556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3366 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:27:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-15 01:27:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 167. [2022-02-15 01:27:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:27:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 190 transitions. [2022-02-15 01:27:26,069 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 190 transitions. Word has length 56 [2022-02-15 01:27:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:26,069 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 190 transitions. [2022-02-15 01:27:26,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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) [2022-02-15 01:27:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 190 transitions. [2022-02-15 01:27:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:27:26,073 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:26,073 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:26,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:27:26,073 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:26,073 INFO L85 PathProgramCache]: Analyzing trace with hash 455274898, now seen corresponding path program 22 times [2022-02-15 01:27:26,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:26,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815265305] [2022-02-15 01:27:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:26,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:26,077 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:26,078 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:26,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:26,538 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:26,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815265305] [2022-02-15 01:27:26,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [815265305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:26,539 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:26,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:27:26,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460063161] [2022-02-15 01:27:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:26,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:27:26,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:27:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:27:26,540 INFO L87 Difference]: Start difference. First operand 167 states and 190 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2022-02-15 01:27:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:27,975 INFO L93 Difference]: Finished difference Result 301 states and 353 transitions. [2022-02-15 01:27:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:27:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 [2022-02-15 01:27:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:27,977 INFO L225 Difference]: With dead ends: 301 [2022-02-15 01:27:27,977 INFO L226 Difference]: Without dead ends: 185 [2022-02-15 01:27:27,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:27:27,978 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 243 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3767 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 3960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:27,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 109 Invalid, 3960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3767 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:27:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-15 01:27:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 174. [2022-02-15 01:27:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 25 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-15 01:27:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 198 transitions. [2022-02-15 01:27:28,010 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 198 transitions. Word has length 58 [2022-02-15 01:27:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:28,010 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 198 transitions. [2022-02-15 01:27:28,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2022-02-15 01:27:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 198 transitions. [2022-02-15 01:27:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:27:28,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:28,011 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:28,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:27:28,011 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:28,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:28,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2019462516, now seen corresponding path program 23 times [2022-02-15 01:27:28,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:28,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405464454] [2022-02-15 01:27:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:28,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:28,013 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:28,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:28,014 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:28,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:28,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:28,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405464454] [2022-02-15 01:27:28,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405464454] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:28,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:28,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:27:28,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841651734] [2022-02-15 01:27:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:28,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:27:28,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:28,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:27:28,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:27:28,439 INFO L87 Difference]: Start difference. First operand 174 states and 198 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2022-02-15 01:27:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:30,123 INFO L93 Difference]: Finished difference Result 313 states and 367 transitions. [2022-02-15 01:27:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:27:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 [2022-02-15 01:27:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:30,125 INFO L225 Difference]: With dead ends: 313 [2022-02-15 01:27:30,125 INFO L226 Difference]: Without dead ends: 192 [2022-02-15 01:27:30,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:27:30,126 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 251 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4126 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 4326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 4126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:30,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 116 Invalid, 4326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 4126 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:27:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-15 01:27:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2022-02-15 01:27:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-15 01:27:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 206 transitions. [2022-02-15 01:27:30,163 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 206 transitions. Word has length 60 [2022-02-15 01:27:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:30,163 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 206 transitions. [2022-02-15 01:27:30,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2022-02-15 01:27:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 206 transitions. [2022-02-15 01:27:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:27:30,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:30,164 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:30,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:27:30,164 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1965209814, now seen corresponding path program 24 times [2022-02-15 01:27:30,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:30,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8111301] [2022-02-15 01:27:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:30,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:30,166 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:30,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:30,171 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:30,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:30,597 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:30,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8111301] [2022-02-15 01:27:30,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [8111301] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:30,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:30,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:27:30,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251338094] [2022-02-15 01:27:30,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:30,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:27:30,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:27:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:27:30,599 INFO L87 Difference]: Start difference. First operand 181 states and 206 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-02-15 01:27:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:32,324 INFO L93 Difference]: Finished difference Result 325 states and 381 transitions. [2022-02-15 01:27:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:27:32,325 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 [2022-02-15 01:27:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:32,331 INFO L225 Difference]: With dead ends: 325 [2022-02-15 01:27:32,332 INFO L226 Difference]: Without dead ends: 199 [2022-02-15 01:27:32,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:27:32,335 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 238 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4725 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 4918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 4725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:32,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 158 Invalid, 4918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 4725 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:27:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-15 01:27:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2022-02-15 01:27:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 27 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-15 01:27:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2022-02-15 01:27:32,397 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 62 [2022-02-15 01:27:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:32,397 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2022-02-15 01:27:32,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-02-15 01:27:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2022-02-15 01:27:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:27:32,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:32,397 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:32,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:27:32,398 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1367970744, now seen corresponding path program 25 times [2022-02-15 01:27:32,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:32,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43823823] [2022-02-15 01:27:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:32,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:32,400 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:32,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:32,402 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:32,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:32,849 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:32,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43823823] [2022-02-15 01:27:32,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [43823823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:32,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:32,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:27:32,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087138627] [2022-02-15 01:27:32,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:32,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:27:32,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:32,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:27:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:27:32,851 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 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) [2022-02-15 01:27:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:34,671 INFO L93 Difference]: Finished difference Result 337 states and 395 transitions. [2022-02-15 01:27:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:27:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 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 [2022-02-15 01:27:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:34,672 INFO L225 Difference]: With dead ends: 337 [2022-02-15 01:27:34,672 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:27:34,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:27:34,673 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 252 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5057 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 5261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 5057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:34,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 155 Invalid, 5261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 5057 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:27:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:27:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 195. [2022-02-15 01:27:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 28 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 01:27:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 222 transitions. [2022-02-15 01:27:34,715 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 222 transitions. Word has length 64 [2022-02-15 01:27:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:34,716 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 222 transitions. [2022-02-15 01:27:34,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 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) [2022-02-15 01:27:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 222 transitions. [2022-02-15 01:27:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:27:34,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:34,716 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:34,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:27:34,716 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:34,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1348125158, now seen corresponding path program 26 times [2022-02-15 01:27:34,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:34,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307061414] [2022-02-15 01:27:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:34,718 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:34,718 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:34,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:34,720 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:35,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:35,208 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:35,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307061414] [2022-02-15 01:27:35,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307061414] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:35,208 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:35,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:27:35,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945258938] [2022-02-15 01:27:35,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:35,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:27:35,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:35,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:27:35,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:27:35,209 INFO L87 Difference]: Start difference. First operand 195 states and 222 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-02-15 01:27:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:36,814 INFO L93 Difference]: Finished difference Result 349 states and 409 transitions. [2022-02-15 01:27:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:27:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 [2022-02-15 01:27:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:36,815 INFO L225 Difference]: With dead ends: 349 [2022-02-15 01:27:36,815 INFO L226 Difference]: Without dead ends: 213 [2022-02-15 01:27:36,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:27:36,816 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 272 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 5333 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 5552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 5333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:36,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 142 Invalid, 5552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 5333 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:27:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-15 01:27:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 202. [2022-02-15 01:27:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 29 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-15 01:27:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 230 transitions. [2022-02-15 01:27:36,856 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 230 transitions. Word has length 66 [2022-02-15 01:27:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:36,856 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 230 transitions. [2022-02-15 01:27:36,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-02-15 01:27:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 230 transitions. [2022-02-15 01:27:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:27:36,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:36,856 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:36,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:27:36,856 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash -176171012, now seen corresponding path program 27 times [2022-02-15 01:27:36,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:36,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235528372] [2022-02-15 01:27:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:36,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:36,858 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:36,859 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:37,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:37,199 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:37,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235528372] [2022-02-15 01:27:37,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235528372] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:37,199 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:37,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:27:37,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240522062] [2022-02-15 01:27:37,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:37,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:27:37,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:27:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:27:37,216 INFO L87 Difference]: Start difference. First operand 202 states and 230 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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) [2022-02-15 01:27:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:38,878 INFO L93 Difference]: Finished difference Result 361 states and 423 transitions. [2022-02-15 01:27:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:27:38,879 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 [2022-02-15 01:27:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:38,879 INFO L225 Difference]: With dead ends: 361 [2022-02-15 01:27:38,880 INFO L226 Difference]: Without dead ends: 220 [2022-02-15 01:27:38,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:27:38,885 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 262 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 5967 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 6181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 5967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:38,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 179 Invalid, 6181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 5967 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:27:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-15 01:27:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 209. [2022-02-15 01:27:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 30 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-15 01:27:38,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 238 transitions. [2022-02-15 01:27:38,991 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 238 transitions. Word has length 68 [2022-02-15 01:27:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:38,991 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 238 transitions. [2022-02-15 01:27:38,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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) [2022-02-15 01:27:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 238 transitions. [2022-02-15 01:27:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:27:38,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:38,991 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:38,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:27:38,992 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash 790331742, now seen corresponding path program 28 times [2022-02-15 01:27:38,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:38,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764546763] [2022-02-15 01:27:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:38,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:38,994 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:38,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:38,995 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:39,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:39,479 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:39,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764546763] [2022-02-15 01:27:39,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764546763] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:39,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:39,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:27:39,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396018212] [2022-02-15 01:27:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:39,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:27:39,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:39,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:27:39,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:27:39,480 INFO L87 Difference]: Start difference. First operand 209 states and 238 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2022-02-15 01:27:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:41,300 INFO L93 Difference]: Finished difference Result 373 states and 437 transitions. [2022-02-15 01:27:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:27:41,300 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 [2022-02-15 01:27:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:41,301 INFO L225 Difference]: With dead ends: 373 [2022-02-15 01:27:41,301 INFO L226 Difference]: Without dead ends: 227 [2022-02-15 01:27:41,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:27:41,303 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 336 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5621 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 5621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:41,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 76 Invalid, 5886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 5621 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:27:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-15 01:27:41,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 216. [2022-02-15 01:27:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 31 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-15 01:27:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 246 transitions. [2022-02-15 01:27:41,365 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 246 transitions. Word has length 70 [2022-02-15 01:27:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:41,365 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 246 transitions. [2022-02-15 01:27:41,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2022-02-15 01:27:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 246 transitions. [2022-02-15 01:27:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:27:41,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:41,366 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:41,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:27:41,366 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1886542400, now seen corresponding path program 29 times [2022-02-15 01:27:41,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:41,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962220891] [2022-02-15 01:27:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:41,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:41,368 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:41,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:41,369 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:41,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:41,886 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:41,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962220891] [2022-02-15 01:27:41,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [962220891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:41,886 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:41,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:27:41,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912008908] [2022-02-15 01:27:41,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:41,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:27:41,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:27:41,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:27:41,887 INFO L87 Difference]: Start difference. First operand 216 states and 246 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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) [2022-02-15 01:27:44,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:44,170 INFO L93 Difference]: Finished difference Result 385 states and 451 transitions. [2022-02-15 01:27:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:27:44,170 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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 [2022-02-15 01:27:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:44,171 INFO L225 Difference]: With dead ends: 385 [2022-02-15 01:27:44,171 INFO L226 Difference]: Without dead ends: 234 [2022-02-15 01:27:44,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:27:44,173 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 272 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6949 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 7173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 6949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:44,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 203 Invalid, 7173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 6949 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:27:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-15 01:27:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 223. [2022-02-15 01:27:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-15 01:27:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2022-02-15 01:27:44,222 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 72 [2022-02-15 01:27:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:44,222 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2022-02-15 01:27:44,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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) [2022-02-15 01:27:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2022-02-15 01:27:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:27:44,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:44,223 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:44,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:27:44,223 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1216970078, now seen corresponding path program 30 times [2022-02-15 01:27:44,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:44,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552858351] [2022-02-15 01:27:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:44,225 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:44,225 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:44,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:44,226 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:44,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:44,786 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:44,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552858351] [2022-02-15 01:27:44,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552858351] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:44,787 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:44,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:27:44,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167416231] [2022-02-15 01:27:44,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:44,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:27:44,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:44,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:27:44,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:27:44,789 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2022-02-15 01:27:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:47,166 INFO L93 Difference]: Finished difference Result 397 states and 465 transitions. [2022-02-15 01:27:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:27:47,166 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 [2022-02-15 01:27:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:47,167 INFO L225 Difference]: With dead ends: 397 [2022-02-15 01:27:47,167 INFO L226 Difference]: Without dead ends: 241 [2022-02-15 01:27:47,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:27:47,169 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 280 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 7429 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 7660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 7429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:47,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 210 Invalid, 7660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 7429 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:27:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-15 01:27:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 230. [2022-02-15 01:27:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 33 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-15 01:27:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 262 transitions. [2022-02-15 01:27:47,225 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 262 transitions. Word has length 74 [2022-02-15 01:27:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:47,225 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 262 transitions. [2022-02-15 01:27:47,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2022-02-15 01:27:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 262 transitions. [2022-02-15 01:27:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 01:27:47,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:47,226 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:47,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:27:47,226 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1309809284, now seen corresponding path program 31 times [2022-02-15 01:27:47,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:47,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471463899] [2022-02-15 01:27:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:47,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:47,228 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:47,229 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:47,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:47,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:47,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471463899] [2022-02-15 01:27:47,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471463899] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:47,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:47,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:27:47,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342024159] [2022-02-15 01:27:47,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:47,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:27:47,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:27:47,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:27:47,819 INFO L87 Difference]: Start difference. First operand 230 states and 262 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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) [2022-02-15 01:27:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:50,631 INFO L93 Difference]: Finished difference Result 409 states and 479 transitions. [2022-02-15 01:27:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:27:50,632 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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 [2022-02-15 01:27:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:50,633 INFO L225 Difference]: With dead ends: 409 [2022-02-15 01:27:50,633 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:27:50,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:27:50,635 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 336 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 7301 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 7571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 7301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:50,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 137 Invalid, 7571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 7301 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 01:27:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:27:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 237. [2022-02-15 01:27:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 200 states have (on average 1.015) internal successors, (203), 200 states have internal predecessors, (203), 34 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-02-15 01:27:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 270 transitions. [2022-02-15 01:27:50,691 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 270 transitions. Word has length 76 [2022-02-15 01:27:50,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:50,693 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 270 transitions. [2022-02-15 01:27:50,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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) [2022-02-15 01:27:50,693 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 270 transitions. [2022-02-15 01:27:50,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 01:27:50,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:50,694 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:50,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:27:50,694 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:50,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1406713370, now seen corresponding path program 32 times [2022-02-15 01:27:50,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:50,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769776434] [2022-02-15 01:27:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:50,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:50,696 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:50,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:50,697 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:51,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:51,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:51,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769776434] [2022-02-15 01:27:51,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [769776434] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:51,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:51,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:27:51,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959698447] [2022-02-15 01:27:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:51,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:27:51,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:27:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:27:51,261 INFO L87 Difference]: Start difference. First operand 237 states and 270 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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) [2022-02-15 01:27:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:53,737 INFO L93 Difference]: Finished difference Result 421 states and 493 transitions. [2022-02-15 01:27:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:27:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 [2022-02-15 01:27:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:53,738 INFO L225 Difference]: With dead ends: 421 [2022-02-15 01:27:53,739 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 01:27:53,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:27:53,739 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 368 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7477 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 7770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 7477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:53,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 104 Invalid, 7770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 7477 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:27:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 01:27:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2022-02-15 01:27:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 35 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-15 01:27:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 278 transitions. [2022-02-15 01:27:53,799 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 278 transitions. Word has length 78 [2022-02-15 01:27:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:53,800 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 278 transitions. [2022-02-15 01:27:53,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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) [2022-02-15 01:27:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 278 transitions. [2022-02-15 01:27:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:27:53,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:53,800 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:53,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:27:53,801 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash -644867896, now seen corresponding path program 33 times [2022-02-15 01:27:53,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:53,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706630348] [2022-02-15 01:27:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:53,802 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:53,802 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:53,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:53,804 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:54,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:54,480 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:54,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706630348] [2022-02-15 01:27:54,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [706630348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:54,480 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:54,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:27:54,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710935993] [2022-02-15 01:27:54,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:54,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:27:54,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:27:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:27:54,481 INFO L87 Difference]: Start difference. First operand 244 states and 278 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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) [2022-02-15 01:27:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:57,556 INFO L93 Difference]: Finished difference Result 433 states and 507 transitions. [2022-02-15 01:27:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:27:57,556 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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 [2022-02-15 01:27:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:57,557 INFO L225 Difference]: With dead ends: 433 [2022-02-15 01:27:57,557 INFO L226 Difference]: Without dead ends: 262 [2022-02-15 01:27:57,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:27:57,558 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 310 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 8883 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 9139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 8883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:57,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 221 Invalid, 9139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 8883 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 01:27:57,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-15 01:27:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 251. [2022-02-15 01:27:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 36 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-02-15 01:27:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 286 transitions. [2022-02-15 01:27:57,637 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 286 transitions. Word has length 80 [2022-02-15 01:27:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:57,637 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 286 transitions. [2022-02-15 01:27:57,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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) [2022-02-15 01:27:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 286 transitions. [2022-02-15 01:27:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 01:27:57,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:57,638 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:57,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:27:57,638 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:57,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:57,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1344192298, now seen corresponding path program 34 times [2022-02-15 01:27:57,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:57,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052464823] [2022-02-15 01:27:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:57,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:57,641 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:57,642 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:58,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:58,272 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:58,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052464823] [2022-02-15 01:27:58,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052464823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:58,272 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:58,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:27:58,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394613032] [2022-02-15 01:27:58,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:58,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:27:58,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:58,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:27:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:27:58,274 INFO L87 Difference]: Start difference. First operand 251 states and 286 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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) [2022-02-15 01:28:00,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:00,783 INFO L93 Difference]: Finished difference Result 445 states and 521 transitions. [2022-02-15 01:28:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:28:00,783 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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 [2022-02-15 01:28:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:00,785 INFO L225 Difference]: With dead ends: 445 [2022-02-15 01:28:00,785 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 01:28:00,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:28:00,798 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 327 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 9299 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 9568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 9299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:00,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 213 Invalid, 9568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 9299 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 01:28:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 01:28:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 258. [2022-02-15 01:28:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 37 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-15 01:28:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 294 transitions. [2022-02-15 01:28:00,865 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 294 transitions. Word has length 82 [2022-02-15 01:28:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:00,865 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 294 transitions. [2022-02-15 01:28:00,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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) [2022-02-15 01:28:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 294 transitions. [2022-02-15 01:28:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-15 01:28:00,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:00,873 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:00,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:28:00,873 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:00,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:00,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1570592012, now seen corresponding path program 35 times [2022-02-15 01:28:00,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:00,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795571884] [2022-02-15 01:28:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:00,875 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:00,876 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:00,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:00,877 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:01,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:01,465 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:01,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795571884] [2022-02-15 01:28:01,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [795571884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:01,465 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:01,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 01:28:01,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389748790] [2022-02-15 01:28:01,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:01,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 01:28:01,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:01,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 01:28:01,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:28:01,466 INFO L87 Difference]: Start difference. First operand 258 states and 294 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 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) [2022-02-15 01:28:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:04,168 INFO L93 Difference]: Finished difference Result 457 states and 535 transitions. [2022-02-15 01:28:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:28:04,168 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 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 [2022-02-15 01:28:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:04,169 INFO L225 Difference]: With dead ends: 457 [2022-02-15 01:28:04,170 INFO L226 Difference]: Without dead ends: 276 [2022-02-15 01:28:04,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:28:04,171 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 329 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 9940 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 10212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 9940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:04,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 230 Invalid, 10212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 9940 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 01:28:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-15 01:28:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 265. [2022-02-15 01:28:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 states have internal predecessors, (227), 38 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-15 01:28:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 302 transitions. [2022-02-15 01:28:04,238 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 302 transitions. Word has length 84 [2022-02-15 01:28:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:04,239 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 302 transitions. [2022-02-15 01:28:04,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 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) [2022-02-15 01:28:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 302 transitions. [2022-02-15 01:28:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:28:04,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:04,239 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:04,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:28:04,239 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash 97385070, now seen corresponding path program 36 times [2022-02-15 01:28:04,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:04,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697408018] [2022-02-15 01:28:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:04,241 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:04,241 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:04,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:04,243 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:04,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:04,851 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:04,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697408018] [2022-02-15 01:28:04,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [697408018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:04,851 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:04,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:28:04,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254687951] [2022-02-15 01:28:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:04,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:28:04,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:28:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:28:04,853 INFO L87 Difference]: Start difference. First operand 265 states and 302 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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) [2022-02-15 01:28:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:08,871 INFO L93 Difference]: Finished difference Result 469 states and 549 transitions. [2022-02-15 01:28:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:28:08,872 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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 [2022-02-15 01:28:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:08,873 INFO L225 Difference]: With dead ends: 469 [2022-02-15 01:28:08,873 INFO L226 Difference]: Without dead ends: 283 [2022-02-15 01:28:08,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:28:08,874 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 349 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 10337 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 10624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 10337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:08,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 217 Invalid, 10624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 10337 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 01:28:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-15 01:28:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 272. [2022-02-15 01:28:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 39 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-15 01:28:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 310 transitions. [2022-02-15 01:28:08,946 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 310 transitions. Word has length 86 [2022-02-15 01:28:08,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:08,947 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 310 transitions. [2022-02-15 01:28:08,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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) [2022-02-15 01:28:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 310 transitions. [2022-02-15 01:28:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-15 01:28:08,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:08,948 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:08,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:28:08,948 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:08,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1684721488, now seen corresponding path program 37 times [2022-02-15 01:28:08,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:08,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170080841] [2022-02-15 01:28:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:08,951 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:08,952 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:08,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:08,953 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:09,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:09,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:09,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170080841] [2022-02-15 01:28:09,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [170080841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:09,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:09,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:28:09,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883534536] [2022-02-15 01:28:09,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:09,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:28:09,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:28:09,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:28:09,715 INFO L87 Difference]: Start difference. First operand 272 states and 310 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 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) [2022-02-15 01:28:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:13,662 INFO L93 Difference]: Finished difference Result 481 states and 563 transitions. [2022-02-15 01:28:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:28:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 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 [2022-02-15 01:28:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:13,674 INFO L225 Difference]: With dead ends: 481 [2022-02-15 01:28:13,675 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 01:28:13,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:28:13,676 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 324 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 11417 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 11689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 11417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:13,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 279 Invalid, 11689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 11417 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 01:28:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 01:28:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 279. [2022-02-15 01:28:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 40 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-15 01:28:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 318 transitions. [2022-02-15 01:28:13,753 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 318 transitions. Word has length 88 [2022-02-15 01:28:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:13,753 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 318 transitions. [2022-02-15 01:28:13,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 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) [2022-02-15 01:28:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 318 transitions. [2022-02-15 01:28:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-15 01:28:13,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:13,754 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:13,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:28:13,754 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:13,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1893338190, now seen corresponding path program 38 times [2022-02-15 01:28:13,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:13,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720009282] [2022-02-15 01:28:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:13,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:13,756 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:13,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:13,758 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:14,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:14,612 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:14,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720009282] [2022-02-15 01:28:14,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [720009282] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:14,612 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:14,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 01:28:14,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243624941] [2022-02-15 01:28:14,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:14,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 01:28:14,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:14,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 01:28:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:28:14,614 INFO L87 Difference]: Start difference. First operand 279 states and 318 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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) [2022-02-15 01:28:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:18,046 INFO L93 Difference]: Finished difference Result 493 states and 577 transitions. [2022-02-15 01:28:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:28:18,046 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 [2022-02-15 01:28:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:18,047 INFO L225 Difference]: With dead ends: 493 [2022-02-15 01:28:18,047 INFO L226 Difference]: Without dead ends: 297 [2022-02-15 01:28:18,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:28:18,054 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 386 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 11201 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 11516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 11201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:18,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 196 Invalid, 11516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 11201 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 01:28:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-15 01:28:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 286. [2022-02-15 01:28:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 41 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-02-15 01:28:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 326 transitions. [2022-02-15 01:28:18,145 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 326 transitions. Word has length 90 [2022-02-15 01:28:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:18,145 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 326 transitions. [2022-02-15 01:28:18,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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) [2022-02-15 01:28:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 326 transitions. [2022-02-15 01:28:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:28:18,149 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:18,149 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:18,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:28:18,149 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash -139884652, now seen corresponding path program 39 times [2022-02-15 01:28:18,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:18,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246855675] [2022-02-15 01:28:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:18,151 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:18,151 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:18,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:18,153 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:18,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:18,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:18,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246855675] [2022-02-15 01:28:18,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [246855675] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:18,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:18,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 01:28:18,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151675424] [2022-02-15 01:28:18,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:18,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 01:28:18,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 01:28:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:28:18,747 INFO L87 Difference]: Start difference. First operand 286 states and 326 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:22,197 INFO L93 Difference]: Finished difference Result 505 states and 591 transitions. [2022-02-15 01:28:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:28:22,197 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:28:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:22,198 INFO L225 Difference]: With dead ends: 505 [2022-02-15 01:28:22,198 INFO L226 Difference]: Without dead ends: 304 [2022-02-15 01:28:22,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:28:22,200 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 412 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 11529 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 11863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 11529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:22,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 173 Invalid, 11863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 11529 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 01:28:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-15 01:28:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 293. [2022-02-15 01:28:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 states have internal predecessors, (251), 42 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 01:28:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 334 transitions. [2022-02-15 01:28:22,296 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 334 transitions. Word has length 92 [2022-02-15 01:28:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:22,296 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 334 transitions. [2022-02-15 01:28:22,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 334 transitions. [2022-02-15 01:28:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-15 01:28:22,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:22,297 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:22,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:28:22,297 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1301785334, now seen corresponding path program 40 times [2022-02-15 01:28:22,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:22,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398407476] [2022-02-15 01:28:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:22,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:22,300 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:22,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:22,305 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:23,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:23,029 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:23,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398407476] [2022-02-15 01:28:23,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398407476] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:23,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:23,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:28:23,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405952] [2022-02-15 01:28:23,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:23,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:28:23,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:28:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:28:23,030 INFO L87 Difference]: Start difference. First operand 293 states and 334 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:26,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:26,756 INFO L93 Difference]: Finished difference Result 517 states and 605 transitions. [2022-02-15 01:28:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:28:26,757 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-02-15 01:28:26,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:26,758 INFO L225 Difference]: With dead ends: 517 [2022-02-15 01:28:26,758 INFO L226 Difference]: Without dead ends: 311 [2022-02-15 01:28:26,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 01:28:26,760 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 366 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 13013 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 13318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 13013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:26,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 270 Invalid, 13318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 13013 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 01:28:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-15 01:28:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 300. [2022-02-15 01:28:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 43 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-15 01:28:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 342 transitions. [2022-02-15 01:28:26,847 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 342 transitions. Word has length 94 [2022-02-15 01:28:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:26,848 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 342 transitions. [2022-02-15 01:28:26,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 342 transitions. [2022-02-15 01:28:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-15 01:28:26,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:26,848 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:26,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:28:26,849 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash -527794728, now seen corresponding path program 41 times [2022-02-15 01:28:26,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:26,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857803132] [2022-02-15 01:28:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:26,851 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:26,851 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:26,853 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:27,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:27,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:27,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857803132] [2022-02-15 01:28:27,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857803132] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:27,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:27,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 01:28:27,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895578430] [2022-02-15 01:28:27,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:27,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 01:28:27,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:27,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 01:28:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:28:27,735 INFO L87 Difference]: Start difference. First operand 300 states and 342 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:31,471 INFO L93 Difference]: Finished difference Result 529 states and 619 transitions. [2022-02-15 01:28:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:28:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-02-15 01:28:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:31,473 INFO L225 Difference]: With dead ends: 529 [2022-02-15 01:28:31,473 INFO L226 Difference]: Without dead ends: 318 [2022-02-15 01:28:31,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:28:31,474 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 380 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 13569 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 13885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 13569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:31,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 267 Invalid, 13885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 13569 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 01:28:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-15 01:28:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 307. [2022-02-15 01:28:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 44 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-02-15 01:28:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 350 transitions. [2022-02-15 01:28:31,568 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 350 transitions. Word has length 96 [2022-02-15 01:28:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:31,568 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 350 transitions. [2022-02-15 01:28:31,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 350 transitions. [2022-02-15 01:28:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-15 01:28:31,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:31,569 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:31,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:28:31,569 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:31,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2112610246, now seen corresponding path program 42 times [2022-02-15 01:28:31,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:31,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244434040] [2022-02-15 01:28:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:31,572 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:31,572 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:31,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:31,573 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:32,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:32,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:32,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244434040] [2022-02-15 01:28:32,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [244434040] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:32,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:32,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 01:28:32,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041043624] [2022-02-15 01:28:32,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:32,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 01:28:32,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:32,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 01:28:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:28:32,402 INFO L87 Difference]: Start difference. First operand 307 states and 350 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:36,052 INFO L93 Difference]: Finished difference Result 541 states and 633 transitions. [2022-02-15 01:28:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:28:36,052 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-02-15 01:28:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:36,054 INFO L225 Difference]: With dead ends: 541 [2022-02-15 01:28:36,054 INFO L226 Difference]: Without dead ends: 325 [2022-02-15 01:28:36,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 01:28:36,055 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 430 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 13537 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 13888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 13537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:36,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 204 Invalid, 13888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 13537 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 01:28:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-15 01:28:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 314. [2022-02-15 01:28:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 45 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-15 01:28:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 358 transitions. [2022-02-15 01:28:36,166 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 358 transitions. Word has length 98 [2022-02-15 01:28:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:36,166 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 358 transitions. [2022-02-15 01:28:36,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 358 transitions. [2022-02-15 01:28:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-15 01:28:36,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:36,167 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:36,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:28:36,167 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash -406932964, now seen corresponding path program 43 times [2022-02-15 01:28:36,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:36,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141973875] [2022-02-15 01:28:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:36,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:36,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:36,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:36,172 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:37,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:37,157 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:37,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141973875] [2022-02-15 01:28:37,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1141973875] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:37,157 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:37,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:28:37,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29997518] [2022-02-15 01:28:37,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:37,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:28:37,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:28:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:28:37,158 INFO L87 Difference]: Start difference. First operand 314 states and 358 transitions. Second operand has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:42,078 INFO L93 Difference]: Finished difference Result 553 states and 647 transitions. [2022-02-15 01:28:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 01:28:42,078 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-02-15 01:28:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:42,080 INFO L225 Difference]: With dead ends: 553 [2022-02-15 01:28:42,080 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 01:28:42,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 01:28:42,081 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 465 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 13748 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 14124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 13748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:42,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 166 Invalid, 14124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 13748 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 01:28:42,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 01:28:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 321. [2022-02-15 01:28:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 46 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-15 01:28:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 366 transitions. [2022-02-15 01:28:42,179 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 366 transitions. Word has length 100 [2022-02-15 01:28:42,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:42,179 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 366 transitions. [2022-02-15 01:28:42,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 366 transitions. [2022-02-15 01:28:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 01:28:42,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:42,180 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:42,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:28:42,180 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:42,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:42,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1928572034, now seen corresponding path program 44 times [2022-02-15 01:28:42,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:42,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656909903] [2022-02-15 01:28:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:42,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:42,183 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:42,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:42,184 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:43,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:43,145 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:43,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656909903] [2022-02-15 01:28:43,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656909903] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:43,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:43,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 01:28:43,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172249946] [2022-02-15 01:28:43,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:43,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 01:28:43,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 01:28:43,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:28:43,146 INFO L87 Difference]: Start difference. First operand 321 states and 366 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:47,628 INFO L93 Difference]: Finished difference Result 565 states and 661 transitions. [2022-02-15 01:28:47,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:28:47,628 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 01:28:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:47,630 INFO L225 Difference]: With dead ends: 565 [2022-02-15 01:28:47,630 INFO L226 Difference]: Without dead ends: 339 [2022-02-15 01:28:47,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:28:47,631 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 410 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 15517 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 15858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 15517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:47,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 278 Invalid, 15858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 15517 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-15 01:28:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-15 01:28:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2022-02-15 01:28:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 47 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 01:28:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 374 transitions. [2022-02-15 01:28:47,733 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 374 transitions. Word has length 102 [2022-02-15 01:28:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:47,733 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 374 transitions. [2022-02-15 01:28:47,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 374 transitions. [2022-02-15 01:28:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-15 01:28:47,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:47,733 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:47,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:28:47,734 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash 360129632, now seen corresponding path program 45 times [2022-02-15 01:28:47,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:47,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530559478] [2022-02-15 01:28:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:47,736 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:47,736 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:47,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:47,737 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:48,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:48,657 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:48,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530559478] [2022-02-15 01:28:48,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [530559478] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:48,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:48,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-15 01:28:48,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423158007] [2022-02-15 01:28:48,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:48,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-15 01:28:48,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-15 01:28:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:28:48,659 INFO L87 Difference]: Start difference. First operand 328 states and 374 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:52,845 INFO L93 Difference]: Finished difference Result 577 states and 675 transitions. [2022-02-15 01:28:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 01:28:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-02-15 01:28:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:52,846 INFO L225 Difference]: With dead ends: 577 [2022-02-15 01:28:52,846 INFO L226 Difference]: Without dead ends: 346 [2022-02-15 01:28:52,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:28:52,848 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 448 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 15701 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 16069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 15701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:52,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 235 Invalid, 16069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 15701 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-15 01:28:52,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-15 01:28:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 335. [2022-02-15 01:28:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 284 states have (on average 1.0105633802816902) internal successors, (287), 284 states have internal predecessors, (287), 48 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-15 01:28:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 382 transitions. [2022-02-15 01:28:52,958 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 382 transitions. Word has length 104 [2022-02-15 01:28:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:52,958 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 382 transitions. [2022-02-15 01:28:52,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 382 transitions. [2022-02-15 01:28:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-15 01:28:52,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:52,958 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:52,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:28:52,959 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash 779175106, now seen corresponding path program 46 times [2022-02-15 01:28:52,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:52,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339599740] [2022-02-15 01:28:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:52,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:52,962 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:52,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:52,964 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:53,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:53,986 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:53,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339599740] [2022-02-15 01:28:53,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339599740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:53,987 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:53,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:28:53,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5290754] [2022-02-15 01:28:53,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:53,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:28:53,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:53,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:28:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:28:53,988 INFO L87 Difference]: Start difference. First operand 335 states and 382 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:58,154 INFO L93 Difference]: Finished difference Result 589 states and 689 transitions. [2022-02-15 01:28:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:28:58,154 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-02-15 01:28:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:58,155 INFO L225 Difference]: With dead ends: 589 [2022-02-15 01:28:58,155 INFO L226 Difference]: Without dead ends: 353 [2022-02-15 01:28:58,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:28:58,156 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 495 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 15719 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 16120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 15719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:58,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 177 Invalid, 16120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 15719 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-15 01:28:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-15 01:28:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 342. [2022-02-15 01:28:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 49 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-02-15 01:28:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 390 transitions. [2022-02-15 01:28:58,270 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 390 transitions. Word has length 106 [2022-02-15 01:28:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:58,270 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 390 transitions. [2022-02-15 01:28:58,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 390 transitions. [2022-02-15 01:28:58,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-15 01:28:58,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:58,271 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:58,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:28:58,271 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:58,271 INFO L85 PathProgramCache]: Analyzing trace with hash -245050204, now seen corresponding path program 47 times [2022-02-15 01:28:58,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:58,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111442177] [2022-02-15 01:28:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:58,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:58,273 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:58,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:58,275 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:59,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:59,116 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:59,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111442177] [2022-02-15 01:28:59,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2111442177] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:59,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:59,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-15 01:28:59,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183758096] [2022-02-15 01:28:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:59,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-15 01:28:59,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-15 01:28:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:28:59,117 INFO L87 Difference]: Start difference. First operand 342 states and 390 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:04,290 INFO L93 Difference]: Finished difference Result 601 states and 703 transitions. [2022-02-15 01:29:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:29:04,290 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-02-15 01:29:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:04,292 INFO L225 Difference]: With dead ends: 601 [2022-02-15 01:29:04,292 INFO L226 Difference]: Without dead ends: 360 [2022-02-15 01:29:04,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:29:04,294 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 467 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 17102 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 17486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 17102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:04,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 244 Invalid, 17486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 17102 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 01:29:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-15 01:29:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 349. [2022-02-15 01:29:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 296 states have (on average 1.010135135135135) internal successors, (299), 296 states have internal predecessors, (299), 50 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-02-15 01:29:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 398 transitions. [2022-02-15 01:29:04,410 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 398 transitions. Word has length 108 [2022-02-15 01:29:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:04,410 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 398 transitions. [2022-02-15 01:29:04,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 398 transitions. [2022-02-15 01:29:04,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-15 01:29:04,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:04,411 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:04,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:29:04,411 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash -978062330, now seen corresponding path program 48 times [2022-02-15 01:29:04,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:04,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820704012] [2022-02-15 01:29:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:04,413 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:04,413 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:04,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:04,415 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:05,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:05,241 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:05,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820704012] [2022-02-15 01:29:05,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820704012] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:05,241 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:05,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 01:29:05,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685640400] [2022-02-15 01:29:05,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:05,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 01:29:05,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 01:29:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:29:05,242 INFO L87 Difference]: Start difference. First operand 349 states and 398 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:10,011 INFO L93 Difference]: Finished difference Result 613 states and 717 transitions. [2022-02-15 01:29:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 01:29:10,012 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-02-15 01:29:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:10,013 INFO L225 Difference]: With dead ends: 613 [2022-02-15 01:29:10,014 INFO L226 Difference]: Without dead ends: 367 [2022-02-15 01:29:10,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 01:29:10,015 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 493 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 17517 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 17920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 17517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:10,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 221 Invalid, 17920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 17517 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 01:29:10,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-15 01:29:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 356. [2022-02-15 01:29:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 302 states have (on average 1.009933774834437) internal successors, (305), 302 states have internal predecessors, (305), 51 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-02-15 01:29:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 406 transitions. [2022-02-15 01:29:10,155 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 406 transitions. Word has length 110 [2022-02-15 01:29:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:10,155 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 406 transitions. [2022-02-15 01:29:10,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 406 transitions. [2022-02-15 01:29:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-02-15 01:29:10,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:10,156 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:10,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:29:10,156 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:10,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1028078872, now seen corresponding path program 49 times [2022-02-15 01:29:10,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:10,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522925863] [2022-02-15 01:29:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:10,157 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:10,158 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:10,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:10,160 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:10,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:10,949 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:10,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522925863] [2022-02-15 01:29:10,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522925863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:10,949 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:10,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:29:10,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382824590] [2022-02-15 01:29:10,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:10,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:29:10,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:10,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:29:10,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:29:10,950 INFO L87 Difference]: Start difference. First operand 356 states and 406 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:16,143 INFO L93 Difference]: Finished difference Result 625 states and 731 transitions. [2022-02-15 01:29:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:29:16,144 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-02-15 01:29:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:16,145 INFO L225 Difference]: With dead ends: 625 [2022-02-15 01:29:16,145 INFO L226 Difference]: Without dead ends: 374 [2022-02-15 01:29:16,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=450, Invalid=10056, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:29:16,146 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 420 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 19817 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 20173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 19817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:16,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 363 Invalid, 20173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 19817 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-15 01:29:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-15 01:29:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 363. [2022-02-15 01:29:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 308 states have (on average 1.0097402597402598) internal successors, (311), 308 states have internal predecessors, (311), 52 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-15 01:29:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 414 transitions. [2022-02-15 01:29:16,279 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 414 transitions. Word has length 112 [2022-02-15 01:29:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:16,279 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 414 transitions. [2022-02-15 01:29:16,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 414 transitions. [2022-02-15 01:29:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-15 01:29:16,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:16,280 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:16,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:29:16,281 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:16,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1849335478, now seen corresponding path program 50 times [2022-02-15 01:29:16,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:16,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190983893] [2022-02-15 01:29:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:16,284 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:16,284 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:16,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:16,291 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:17,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:17,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:17,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190983893] [2022-02-15 01:29:17,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [190983893] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:17,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:17,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 01:29:17,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301521370] [2022-02-15 01:29:17,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:17,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 01:29:17,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 01:29:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:29:17,517 INFO L87 Difference]: Start difference. First operand 363 states and 414 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:22,822 INFO L93 Difference]: Finished difference Result 637 states and 745 transitions. [2022-02-15 01:29:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:29:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-02-15 01:29:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:22,824 INFO L225 Difference]: With dead ends: 637 [2022-02-15 01:29:22,824 INFO L226 Difference]: Without dead ends: 381 [2022-02-15 01:29:22,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=459, Invalid=10461, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:29:22,826 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 473 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 19751 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 20144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 19751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:22,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 295 Invalid, 20144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 19751 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-02-15 01:29:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-02-15 01:29:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 370. [2022-02-15 01:29:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 314 states have (on average 1.0095541401273886) internal successors, (317), 314 states have internal predecessors, (317), 53 states have call successors, (53), 3 states have call predecessors, (53), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-02-15 01:29:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 422 transitions. [2022-02-15 01:29:22,970 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 422 transitions. Word has length 114 [2022-02-15 01:29:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:22,971 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 422 transitions. [2022-02-15 01:29:22,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 422 transitions. [2022-02-15 01:29:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 01:29:22,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:22,971 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:22,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:29:22,971 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash -802951380, now seen corresponding path program 51 times [2022-02-15 01:29:22,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:22,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441344026] [2022-02-15 01:29:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:22,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:22,973 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:22,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:22,976 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:23,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:23,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:23,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441344026] [2022-02-15 01:29:23,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1441344026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:23,995 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:23,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-15 01:29:23,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981083339] [2022-02-15 01:29:23,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:23,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 01:29:23,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 01:29:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:29:23,996 INFO L87 Difference]: Start difference. First operand 370 states and 422 transitions. Second operand has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:30,480 INFO L93 Difference]: Finished difference Result 649 states and 759 transitions. [2022-02-15 01:29:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 01:29:30,480 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-02-15 01:29:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:30,482 INFO L225 Difference]: With dead ends: 649 [2022-02-15 01:29:30,482 INFO L226 Difference]: Without dead ends: 388 [2022-02-15 01:29:30,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=468, Invalid=10874, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 01:29:30,483 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 460 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 20969 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 21355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 20969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:30,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 337 Invalid, 21355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 20969 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-02-15 01:29:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-15 01:29:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 377. [2022-02-15 01:29:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 320 states have (on average 1.009375) internal successors, (323), 320 states have internal predecessors, (323), 54 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-02-15 01:29:30,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 430 transitions. [2022-02-15 01:29:30,625 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 430 transitions. Word has length 116 [2022-02-15 01:29:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:30,626 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 430 transitions. [2022-02-15 01:29:30,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 430 transitions. [2022-02-15 01:29:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-15 01:29:30,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:30,627 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:30,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:29:30,627 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:30,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:30,627 INFO L85 PathProgramCache]: Analyzing trace with hash -250180466, now seen corresponding path program 52 times [2022-02-15 01:29:30,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:30,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924116837] [2022-02-15 01:29:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:30,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:30,629 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:30,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:30,631 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:31,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:31,557 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:31,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924116837] [2022-02-15 01:29:31,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [924116837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:31,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:31,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:29:31,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272342600] [2022-02-15 01:29:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:31,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:29:31,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:29:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:29:31,558 INFO L87 Difference]: Start difference. First operand 377 states and 430 transitions. Second operand has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:37,222 INFO L93 Difference]: Finished difference Result 661 states and 773 transitions. [2022-02-15 01:29:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 01:29:37,222 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-02-15 01:29:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:37,224 INFO L225 Difference]: With dead ends: 661 [2022-02-15 01:29:37,224 INFO L226 Difference]: Without dead ends: 395 [2022-02-15 01:29:37,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=477, Invalid=11295, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 01:29:37,225 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 459 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 21977 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 22364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 21977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:37,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 359 Invalid, 22364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 21977 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-15 01:29:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-15 01:29:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 384. [2022-02-15 01:29:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 326 states have (on average 1.00920245398773) internal successors, (329), 326 states have internal predecessors, (329), 55 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-15 01:29:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 438 transitions. [2022-02-15 01:29:37,376 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 438 transitions. Word has length 118 [2022-02-15 01:29:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:37,376 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 438 transitions. [2022-02-15 01:29:37,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 438 transitions. [2022-02-15 01:29:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-15 01:29:37,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:37,377 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:37,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:29:37,377 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1613276816, now seen corresponding path program 53 times [2022-02-15 01:29:37,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:37,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584023255] [2022-02-15 01:29:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:37,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:37,379 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:37,382 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:38,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:38,546 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:38,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584023255] [2022-02-15 01:29:38,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1584023255] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:38,546 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:38,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-15 01:29:38,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779388023] [2022-02-15 01:29:38,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:38,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-15 01:29:38,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-15 01:29:38,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:29:38,547 INFO L87 Difference]: Start difference. First operand 384 states and 438 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:44,254 INFO L93 Difference]: Finished difference Result 673 states and 787 transitions. [2022-02-15 01:29:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:29:44,254 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-02-15 01:29:44,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:44,256 INFO L225 Difference]: With dead ends: 673 [2022-02-15 01:29:44,256 INFO L226 Difference]: Without dead ends: 402 [2022-02-15 01:29:44,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=486, Invalid=11724, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:29:44,257 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 479 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 22580 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 22982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 22580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:44,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 346 Invalid, 22982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 22580 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-15 01:29:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-02-15 01:29:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 391. [2022-02-15 01:29:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 332 states have (on average 1.0090361445783131) internal successors, (335), 332 states have internal predecessors, (335), 56 states have call successors, (56), 3 states have call predecessors, (56), 2 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-15 01:29:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 446 transitions. [2022-02-15 01:29:44,413 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 446 transitions. Word has length 120 [2022-02-15 01:29:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:44,414 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 446 transitions. [2022-02-15 01:29:44,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 446 transitions. [2022-02-15 01:29:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-15 01:29:44,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:44,414 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:44,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:29:44,414 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1583843886, now seen corresponding path program 54 times [2022-02-15 01:29:44,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:44,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239012284] [2022-02-15 01:29:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:44,417 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:44,417 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:44,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:44,420 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:45,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:45,851 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:45,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239012284] [2022-02-15 01:29:45,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [239012284] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:45,851 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:45,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-15 01:29:45,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579301550] [2022-02-15 01:29:45,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:45,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 01:29:45,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 01:29:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:29:45,852 INFO L87 Difference]: Start difference. First operand 391 states and 446 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:52,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:52,863 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2022-02-15 01:29:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 01:29:52,863 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-02-15 01:29:52,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:52,864 INFO L225 Difference]: With dead ends: 685 [2022-02-15 01:29:52,864 INFO L226 Difference]: Without dead ends: 409 [2022-02-15 01:29:52,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=495, Invalid=12161, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 01:29:52,866 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 532 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 22509 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 22948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 22509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:52,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 278 Invalid, 22948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 22509 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-15 01:29:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-15 01:29:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 398. [2022-02-15 01:29:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 338 states have (on average 1.0088757396449703) internal successors, (341), 338 states have internal predecessors, (341), 57 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-15 01:29:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2022-02-15 01:29:53,014 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 122 [2022-02-15 01:29:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:53,015 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2022-02-15 01:29:53,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2022-02-15 01:29:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-15 01:29:53,015 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:53,015 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:53,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:29:53,015 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash 931398068, now seen corresponding path program 55 times [2022-02-15 01:29:53,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:53,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450889956] [2022-02-15 01:29:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:53,017 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:53,017 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:53,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:53,019 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:54,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:54,335 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:54,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450889956] [2022-02-15 01:29:54,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [450889956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:54,335 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:54,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:29:54,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906797341] [2022-02-15 01:29:54,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:54,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:29:54,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:29:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:29:54,337 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:01,185 INFO L93 Difference]: Finished difference Result 697 states and 815 transitions. [2022-02-15 01:30:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 01:30:01,185 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-02-15 01:30:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:01,187 INFO L225 Difference]: With dead ends: 697 [2022-02-15 01:30:01,187 INFO L226 Difference]: Without dead ends: 416 [2022-02-15 01:30:01,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=504, Invalid=12606, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 01:30:01,189 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 525 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 23684 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 24120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 23684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:01,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 310 Invalid, 24120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 23684 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-02-15 01:30:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-15 01:30:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 405. [2022-02-15 01:30:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 344 states have (on average 1.0087209302325582) internal successors, (347), 344 states have internal predecessors, (347), 58 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-02-15 01:30:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 462 transitions. [2022-02-15 01:30:01,352 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 462 transitions. Word has length 124 [2022-02-15 01:30:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:01,352 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 462 transitions. [2022-02-15 01:30:01,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 462 transitions. [2022-02-15 01:30:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-15 01:30:01,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:01,353 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:01,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:30:01,353 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash 12328214, now seen corresponding path program 56 times [2022-02-15 01:30:01,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:01,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262937749] [2022-02-15 01:30:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:01,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:01,355 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:01,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:01,358 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:02,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:02,574 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:02,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262937749] [2022-02-15 01:30:02,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1262937749] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:02,574 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:02,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-15 01:30:02,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546905321] [2022-02-15 01:30:02,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:02,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 01:30:02,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:02,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 01:30:02,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:30:02,576 INFO L87 Difference]: Start difference. First operand 405 states and 462 transitions. Second operand has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:09,792 INFO L93 Difference]: Finished difference Result 709 states and 829 transitions. [2022-02-15 01:30:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:30:09,792 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-02-15 01:30:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:09,794 INFO L225 Difference]: With dead ends: 709 [2022-02-15 01:30:09,794 INFO L226 Difference]: Without dead ends: 423 [2022-02-15 01:30:09,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=513, Invalid=13059, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:30:09,795 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 572 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 23733 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 24202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 23733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:09,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 252 Invalid, 24202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 23733 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-02-15 01:30:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-15 01:30:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2022-02-15 01:30:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 350 states have (on average 1.0085714285714287) internal successors, (353), 350 states have internal predecessors, (353), 59 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-02-15 01:30:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 470 transitions. [2022-02-15 01:30:09,961 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 470 transitions. Word has length 126 [2022-02-15 01:30:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:09,961 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 470 transitions. [2022-02-15 01:30:09,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 470 transitions. [2022-02-15 01:30:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-15 01:30:09,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:09,962 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:09,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:30:09,962 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:09,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1549461496, now seen corresponding path program 57 times [2022-02-15 01:30:09,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:09,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411624230] [2022-02-15 01:30:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:09,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:09,964 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:09,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:09,966 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:11,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:11,384 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:11,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411624230] [2022-02-15 01:30:11,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [411624230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:11,384 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:11,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-15 01:30:11,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105208194] [2022-02-15 01:30:11,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:11,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-15 01:30:11,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:11,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-15 01:30:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:30:11,385 INFO L87 Difference]: Start difference. First operand 412 states and 470 transitions. Second operand has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:20,251 INFO L93 Difference]: Finished difference Result 721 states and 843 transitions. [2022-02-15 01:30:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 01:30:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-02-15 01:30:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:20,252 INFO L225 Difference]: With dead ends: 721 [2022-02-15 01:30:20,252 INFO L226 Difference]: Without dead ends: 430 [2022-02-15 01:30:20,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=522, Invalid=13520, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 01:30:20,254 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 562 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 25007 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 25471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 25007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:20,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 289 Invalid, 25471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 25007 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-02-15 01:30:20,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-02-15 01:30:20,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 419. [2022-02-15 01:30:20,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 356 states have (on average 1.0084269662921348) internal successors, (359), 356 states have internal predecessors, (359), 60 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-02-15 01:30:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 478 transitions. [2022-02-15 01:30:20,452 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 478 transitions. Word has length 128 [2022-02-15 01:30:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:20,452 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 478 transitions. [2022-02-15 01:30:20,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:20,453 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 478 transitions. [2022-02-15 01:30:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-02-15 01:30:20,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:20,463 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:20,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:30:20,463 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:20,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1265795674, now seen corresponding path program 58 times [2022-02-15 01:30:20,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:20,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995157950] [2022-02-15 01:30:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:20,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:20,465 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:20,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:20,468 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:21,969 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:21,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995157950] [2022-02-15 01:30:21,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995157950] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:21,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:21,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:30:21,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821112112] [2022-02-15 01:30:21,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:21,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:30:21,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:30:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:30:21,977 INFO L87 Difference]: Start difference. First operand 419 states and 478 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:29,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:29,506 INFO L93 Difference]: Finished difference Result 733 states and 857 transitions. [2022-02-15 01:30:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 01:30:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-02-15 01:30:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:29,508 INFO L225 Difference]: With dead ends: 733 [2022-02-15 01:30:29,508 INFO L226 Difference]: Without dead ends: 437 [2022-02-15 01:30:29,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=531, Invalid=13989, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 01:30:29,509 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 627 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24659 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 25168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 24659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:29,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 201 Invalid, 25168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 24659 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-02-15 01:30:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-02-15 01:30:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 426. [2022-02-15 01:30:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 362 states have (on average 1.0082872928176796) internal successors, (365), 362 states have internal predecessors, (365), 61 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-02-15 01:30:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 486 transitions. [2022-02-15 01:30:29,697 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 486 transitions. Word has length 130 [2022-02-15 01:30:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:29,697 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 486 transitions. [2022-02-15 01:30:29,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 486 transitions. [2022-02-15 01:30:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-15 01:30:29,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:29,698 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:29,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:30:29,698 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:29,698 INFO L85 PathProgramCache]: Analyzing trace with hash -754119620, now seen corresponding path program 59 times [2022-02-15 01:30:29,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:29,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034041121] [2022-02-15 01:30:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:29,699 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:29,699 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:29,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:29,702 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:31,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:31,205 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:31,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034041121] [2022-02-15 01:30:31,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034041121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:31,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:31,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-15 01:30:31,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263329396] [2022-02-15 01:30:31,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:31,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-15 01:30:31,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-15 01:30:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:30:31,207 INFO L87 Difference]: Start difference. First operand 426 states and 486 transitions. Second operand has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:38,802 INFO L93 Difference]: Finished difference Result 745 states and 871 transitions. [2022-02-15 01:30:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:30:38,802 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-02-15 01:30:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:38,804 INFO L225 Difference]: With dead ends: 745 [2022-02-15 01:30:38,804 INFO L226 Difference]: Without dead ends: 444 [2022-02-15 01:30:38,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=540, Invalid=14466, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:30:38,806 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 548 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 27505 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 27963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 27505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:38,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 353 Invalid, 27963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 27505 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-15 01:30:38,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-02-15 01:30:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 433. [2022-02-15 01:30:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 368 states have (on average 1.0081521739130435) internal successors, (371), 368 states have internal predecessors, (371), 62 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-02-15 01:30:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 494 transitions. [2022-02-15 01:30:38,995 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 494 transitions. Word has length 132 [2022-02-15 01:30:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:38,995 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 494 transitions. [2022-02-15 01:30:38,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 494 transitions. [2022-02-15 01:30:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-15 01:30:38,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:38,996 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:38,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:30:38,996 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash -567499362, now seen corresponding path program 60 times [2022-02-15 01:30:38,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:38,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887118544] [2022-02-15 01:30:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:38,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:38,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:38,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:39,000 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:40,631 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:40,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887118544] [2022-02-15 01:30:40,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [887118544] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:40,631 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:40,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-15 01:30:40,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918911799] [2022-02-15 01:30:40,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:40,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-15 01:30:40,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:40,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-15 01:30:40,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:30:40,633 INFO L87 Difference]: Start difference. First operand 433 states and 494 transitions. Second operand has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:50,201 INFO L93 Difference]: Finished difference Result 757 states and 885 transitions. [2022-02-15 01:30:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 01:30:50,201 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-15 01:30:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:50,203 INFO L225 Difference]: With dead ends: 757 [2022-02-15 01:30:50,203 INFO L226 Difference]: Without dead ends: 451 [2022-02-15 01:30:50,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=549, Invalid=14951, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 01:30:50,215 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 601 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 27433 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 27928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 27433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:50,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 285 Invalid, 27928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 27433 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-02-15 01:30:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-02-15 01:30:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 440. [2022-02-15 01:30:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 374 states have (on average 1.0080213903743316) internal successors, (377), 374 states have internal predecessors, (377), 63 states have call successors, (63), 3 states have call predecessors, (63), 2 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-02-15 01:30:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 502 transitions. [2022-02-15 01:30:50,404 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 502 transitions. Word has length 134 [2022-02-15 01:30:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:50,405 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 502 transitions. [2022-02-15 01:30:50,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 502 transitions. [2022-02-15 01:30:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-02-15 01:30:50,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:50,406 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:50,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:30:50,406 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1614057856, now seen corresponding path program 61 times [2022-02-15 01:30:50,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:50,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828676350] [2022-02-15 01:30:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:50,408 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:50,408 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:50,411 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:51,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:51,791 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:51,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828676350] [2022-02-15 01:30:51,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [828676350] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:51,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:51,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:30:51,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554610684] [2022-02-15 01:30:51,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:30:51,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:30:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:30:51,792 INFO L87 Difference]: Start difference. First operand 440 states and 502 transitions. Second operand has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:01,042 INFO L93 Difference]: Finished difference Result 769 states and 899 transitions. [2022-02-15 01:31:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 01:31:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-02-15 01:31:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:01,044 INFO L225 Difference]: With dead ends: 769 [2022-02-15 01:31:01,044 INFO L226 Difference]: Without dead ends: 458 [2022-02-15 01:31:01,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=558, Invalid=15444, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 01:31:01,045 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 519 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 30452 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 30894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 30452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:01,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 442 Invalid, 30894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 30452 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-02-15 01:31:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-15 01:31:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 447. [2022-02-15 01:31:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 380 states have (on average 1.0078947368421052) internal successors, (383), 380 states have internal predecessors, (383), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-02-15 01:31:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 510 transitions. [2022-02-15 01:31:01,246 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 510 transitions. Word has length 136 [2022-02-15 01:31:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:01,246 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 510 transitions. [2022-02-15 01:31:01,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 510 transitions. [2022-02-15 01:31:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-15 01:31:01,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:01,247 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:01,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:31:01,247 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1960543970, now seen corresponding path program 62 times [2022-02-15 01:31:01,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:01,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257102362] [2022-02-15 01:31:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:01,249 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:01,249 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:01,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:01,252 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:02,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:02,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:02,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257102362] [2022-02-15 01:31:02,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [257102362] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:02,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:02,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-15 01:31:02,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167266071] [2022-02-15 01:31:02,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:02,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-15 01:31:02,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-15 01:31:02,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:31:02,770 INFO L87 Difference]: Start difference. First operand 447 states and 510 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:10,766 INFO L93 Difference]: Finished difference Result 781 states and 913 transitions. [2022-02-15 01:31:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:31:10,766 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-02-15 01:31:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:10,768 INFO L225 Difference]: With dead ends: 781 [2022-02-15 01:31:10,768 INFO L226 Difference]: Without dead ends: 465 [2022-02-15 01:31:10,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=567, Invalid=15945, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:31:10,770 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 569 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 30467 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 30944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 30467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:10,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 379 Invalid, 30944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 30467 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-15 01:31:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-02-15 01:31:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 454. [2022-02-15 01:31:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 386 states have internal predecessors, (389), 65 states have call successors, (65), 3 states have call predecessors, (65), 2 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-02-15 01:31:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 518 transitions. [2022-02-15 01:31:10,988 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 518 transitions. Word has length 138 [2022-02-15 01:31:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:10,988 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 518 transitions. [2022-02-15 01:31:10,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 518 transitions. [2022-02-15 01:31:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-15 01:31:10,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:10,989 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:10,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:31:10,989 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1179061956, now seen corresponding path program 63 times [2022-02-15 01:31:10,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:10,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559049521] [2022-02-15 01:31:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:10,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:10,991 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:10,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:10,993 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:12,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:12,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:12,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559049521] [2022-02-15 01:31:12,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [559049521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:12,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:12,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-15 01:31:12,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923346267] [2022-02-15 01:31:12,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:12,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-15 01:31:12,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:12,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-15 01:31:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:31:12,452 INFO L87 Difference]: Start difference. First operand 454 states and 518 transitions. Second operand has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:20,174 INFO L93 Difference]: Finished difference Result 793 states and 927 transitions. [2022-02-15 01:31:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 01:31:20,174 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-02-15 01:31:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:20,176 INFO L225 Difference]: With dead ends: 793 [2022-02-15 01:31:20,176 INFO L226 Difference]: Without dead ends: 472 [2022-02-15 01:31:20,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=576, Invalid=16454, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 01:31:20,177 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 634 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 30115 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 30637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 30115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:20,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 291 Invalid, 30637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 30115 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-15 01:31:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-02-15 01:31:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 461. [2022-02-15 01:31:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 392 states have (on average 1.0076530612244898) internal successors, (395), 392 states have internal predecessors, (395), 66 states have call successors, (66), 3 states have call predecessors, (66), 2 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-02-15 01:31:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 526 transitions. [2022-02-15 01:31:20,397 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 526 transitions. Word has length 140 [2022-02-15 01:31:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:20,397 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 526 transitions. [2022-02-15 01:31:20,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 526 transitions. [2022-02-15 01:31:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-02-15 01:31:20,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:20,398 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:20,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:31:20,405 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1794123302, now seen corresponding path program 64 times [2022-02-15 01:31:20,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:20,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829817656] [2022-02-15 01:31:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:20,408 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:20,408 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:20,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:20,410 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:21,659 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:21,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829817656] [2022-02-15 01:31:21,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829817656] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:21,660 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:21,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:31:21,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093459203] [2022-02-15 01:31:21,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:21,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:31:21,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:21,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:31:21,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:31:21,661 INFO L87 Difference]: Start difference. First operand 461 states and 526 transitions. Second operand has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:29,651 INFO L93 Difference]: Finished difference Result 805 states and 941 transitions. [2022-02-15 01:31:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 01:31:29,651 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-02-15 01:31:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:29,653 INFO L225 Difference]: With dead ends: 805 [2022-02-15 01:31:29,653 INFO L226 Difference]: Without dead ends: 479 [2022-02-15 01:31:29,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=585, Invalid=16971, Unknown=0, NotChecked=0, Total=17556 [2022-02-15 01:31:29,654 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 729 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29021 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 29608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 29021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:29,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 153 Invalid, 29608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 29021 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-02-15 01:31:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-15 01:31:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 468. [2022-02-15 01:31:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 398 states have (on average 1.0075376884422111) internal successors, (401), 398 states have internal predecessors, (401), 67 states have call successors, (67), 3 states have call predecessors, (67), 2 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-02-15 01:31:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 534 transitions. [2022-02-15 01:31:29,871 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 534 transitions. Word has length 142 [2022-02-15 01:31:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:29,871 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 534 transitions. [2022-02-15 01:31:29,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 534 transitions. [2022-02-15 01:31:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-15 01:31:29,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:29,872 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:29,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:31:29,872 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash 162589960, now seen corresponding path program 65 times [2022-02-15 01:31:29,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:29,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383459199] [2022-02-15 01:31:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:29,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:29,877 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:29,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:29,885 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:31,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:31,141 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:31,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383459199] [2022-02-15 01:31:31,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [383459199] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:31,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:31,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-15 01:31:31,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916036267] [2022-02-15 01:31:31,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:31,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-15 01:31:31,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:31,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-15 01:31:31,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:31:31,143 INFO L87 Difference]: Start difference. First operand 468 states and 534 transitions. Second operand has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:39,627 INFO L93 Difference]: Finished difference Result 817 states and 955 transitions. [2022-02-15 01:31:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:31:39,627 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-02-15 01:31:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:39,629 INFO L225 Difference]: With dead ends: 817 [2022-02-15 01:31:39,629 INFO L226 Difference]: Without dead ends: 486 [2022-02-15 01:31:39,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=594, Invalid=17496, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:31:39,630 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 608 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 33141 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 33649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 33141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:39,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 375 Invalid, 33649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 33141 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-15 01:31:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-02-15 01:31:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 475. [2022-02-15 01:31:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 404 states have (on average 1.0074257425742574) internal successors, (407), 404 states have internal predecessors, (407), 68 states have call successors, (68), 3 states have call predecessors, (68), 2 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-02-15 01:31:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 542 transitions. [2022-02-15 01:31:39,850 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 542 transitions. Word has length 144 [2022-02-15 01:31:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:39,850 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 542 transitions. [2022-02-15 01:31:39,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 542 transitions. [2022-02-15 01:31:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-15 01:31:39,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:39,851 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:39,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:31:39,851 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash -77888662, now seen corresponding path program 66 times [2022-02-15 01:31:39,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:39,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978456992] [2022-02-15 01:31:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:39,853 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:39,853 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:39,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:39,855 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:41,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:41,352 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:41,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978456992] [2022-02-15 01:31:41,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1978456992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:41,352 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:41,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 01:31:41,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678249599] [2022-02-15 01:31:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:41,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 01:31:41,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 01:31:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:31:41,354 INFO L87 Difference]: Start difference. First operand 475 states and 542 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:51,180 INFO L93 Difference]: Finished difference Result 829 states and 969 transitions. [2022-02-15 01:31:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 01:31:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-02-15 01:31:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:51,182 INFO L225 Difference]: With dead ends: 829 [2022-02-15 01:31:51,182 INFO L226 Difference]: Without dead ends: 493 [2022-02-15 01:31:51,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=603, Invalid=18029, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 01:31:51,184 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 562 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 35513 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 35992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 35513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:51,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 472 Invalid, 35992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 35513 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-02-15 01:31:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-02-15 01:31:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 482. [2022-02-15 01:31:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 410 states have (on average 1.0073170731707317) internal successors, (413), 410 states have internal predecessors, (413), 69 states have call successors, (69), 3 states have call predecessors, (69), 2 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-02-15 01:31:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 550 transitions. [2022-02-15 01:31:51,411 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 550 transitions. Word has length 146 [2022-02-15 01:31:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:51,411 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 550 transitions. [2022-02-15 01:31:51,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 550 transitions. [2022-02-15 01:31:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-02-15 01:31:51,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:51,412 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:51,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:31:51,412 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash 750389580, now seen corresponding path program 67 times [2022-02-15 01:31:51,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:51,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81240878] [2022-02-15 01:31:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:51,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:51,414 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:51,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:51,417 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:53,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:53,212 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:53,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81240878] [2022-02-15 01:31:53,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [81240878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:53,212 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:53,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:31:53,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419449029] [2022-02-15 01:31:53,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:53,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:31:53,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:53,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:31:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:31:53,213 INFO L87 Difference]: Start difference. First operand 482 states and 550 transitions. Second operand has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:02,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:02,238 INFO L93 Difference]: Finished difference Result 841 states and 983 transitions. [2022-02-15 01:32:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 01:32:02,239 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-02-15 01:32:02,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:02,240 INFO L225 Difference]: With dead ends: 841 [2022-02-15 01:32:02,240 INFO L226 Difference]: Without dead ends: 500 [2022-02-15 01:32:02,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=612, Invalid=18570, Unknown=0, NotChecked=0, Total=19182 [2022-02-15 01:32:02,242 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 696 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 33437 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 34007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 33437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:02,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 269 Invalid, 34007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 33437 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 01:32:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-02-15 01:32:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 489. [2022-02-15 01:32:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 416 states have (on average 1.0072115384615385) internal successors, (419), 416 states have internal predecessors, (419), 70 states have call successors, (70), 3 states have call predecessors, (70), 2 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-02-15 01:32:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 558 transitions. [2022-02-15 01:32:02,476 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 558 transitions. Word has length 148 [2022-02-15 01:32:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:02,476 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 558 transitions. [2022-02-15 01:32:02,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 558 transitions. [2022-02-15 01:32:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-02-15 01:32:02,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:02,477 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:02,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:32:02,477 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:02,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:02,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2138136914, now seen corresponding path program 68 times [2022-02-15 01:32:02,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:02,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16283736] [2022-02-15 01:32:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:02,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:32:02,479 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:32:02,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:02,482 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:04,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:04,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:04,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16283736] [2022-02-15 01:32:04,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [16283736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:04,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:04,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-15 01:32:04,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473476239] [2022-02-15 01:32:04,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:04,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-15 01:32:04,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:04,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-15 01:32:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:32:04,517 INFO L87 Difference]: Start difference. First operand 489 states and 558 transitions. Second operand has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:13,746 INFO L93 Difference]: Finished difference Result 853 states and 997 transitions. [2022-02-15 01:32:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:32:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-02-15 01:32:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:13,748 INFO L225 Difference]: With dead ends: 853 [2022-02-15 01:32:13,748 INFO L226 Difference]: Without dead ends: 507 [2022-02-15 01:32:13,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=621, Invalid=19119, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:32:13,749 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 686 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 34941 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 35506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 34941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:13,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 306 Invalid, 35506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 34941 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 01:32:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-15 01:32:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2022-02-15 01:32:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 422 states have (on average 1.0071090047393365) internal successors, (425), 422 states have internal predecessors, (425), 71 states have call successors, (71), 3 states have call predecessors, (71), 2 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-02-15 01:32:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 566 transitions. [2022-02-15 01:32:13,997 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 566 transitions. Word has length 150 [2022-02-15 01:32:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:13,997 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 566 transitions. [2022-02-15 01:32:13,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 566 transitions. [2022-02-15 01:32:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-15 01:32:13,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:13,998 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:13,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:32:13,998 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash 831742864, now seen corresponding path program 69 times [2022-02-15 01:32:13,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:13,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17516684] [2022-02-15 01:32:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:14,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:32:14,000 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:32:14,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:14,003 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:15,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:15,961 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:15,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17516684] [2022-02-15 01:32:15,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [17516684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:15,961 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:15,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-15 01:32:15,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9370643] [2022-02-15 01:32:15,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:15,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-15 01:32:15,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:15,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-15 01:32:15,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:32:15,963 INFO L87 Difference]: Start difference. First operand 496 states and 566 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:26,937 INFO L93 Difference]: Finished difference Result 865 states and 1011 transitions. [2022-02-15 01:32:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 01:32:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-02-15 01:32:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:26,948 INFO L225 Difference]: With dead ends: 865 [2022-02-15 01:32:26,948 INFO L226 Difference]: Without dead ends: 514 [2022-02-15 01:32:26,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=630, Invalid=19676, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 01:32:26,949 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 598 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 38475 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 38983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 38475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:26,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 473 Invalid, 38983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 38475 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-02-15 01:32:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-15 01:32:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 503. [2022-02-15 01:32:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 428 states have (on average 1.0070093457943925) internal successors, (431), 428 states have internal predecessors, (431), 72 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-02-15 01:32:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 574 transitions. [2022-02-15 01:32:27,205 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 574 transitions. Word has length 152 [2022-02-15 01:32:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:27,206 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 574 transitions. [2022-02-15 01:32:27,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 574 transitions. [2022-02-15 01:32:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-02-15 01:32:27,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:27,206 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:27,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:32:27,207 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1267042318, now seen corresponding path program 70 times [2022-02-15 01:32:27,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:27,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987043861] [2022-02-15 01:32:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:27,208 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:32:27,208 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:32:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:27,212 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:28,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:28,721 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:28,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987043861] [2022-02-15 01:32:28,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [987043861] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:28,721 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:28,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:32:28,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497650223] [2022-02-15 01:32:28,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:28,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:32:28,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:28,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:32:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:32:28,723 INFO L87 Difference]: Start difference. First operand 503 states and 574 transitions. Second operand has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:38,618 INFO L93 Difference]: Finished difference Result 877 states and 1025 transitions. [2022-02-15 01:32:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 01:32:38,618 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-02-15 01:32:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:38,620 INFO L225 Difference]: With dead ends: 877 [2022-02-15 01:32:38,620 INFO L226 Difference]: Without dead ends: 521 [2022-02-15 01:32:38,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=639, Invalid=20241, Unknown=0, NotChecked=0, Total=20880 [2022-02-15 01:32:38,621 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 738 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 36161 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 36764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 36161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:38,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 260 Invalid, 36764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 36161 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-02-15 01:32:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-15 01:32:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 510. [2022-02-15 01:32:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 434 states have (on average 1.0069124423963134) internal successors, (437), 434 states have internal predecessors, (437), 73 states have call successors, (73), 3 states have call predecessors, (73), 2 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-02-15 01:32:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 582 transitions. [2022-02-15 01:32:38,882 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 582 transitions. Word has length 154 [2022-02-15 01:32:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:38,882 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 582 transitions. [2022-02-15 01:32:38,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 582 transitions. [2022-02-15 01:32:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-02-15 01:32:38,883 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:38,883 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:38,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:32:38,883 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash 435026900, now seen corresponding path program 71 times [2022-02-15 01:32:38,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:38,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436403492] [2022-02-15 01:32:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:38,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:32:38,885 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:32:38,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:38,888 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:41,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:41,133 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:41,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436403492] [2022-02-15 01:32:41,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [436403492] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:41,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:41,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-15 01:32:41,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624606028] [2022-02-15 01:32:41,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:41,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-15 01:32:41,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:41,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-15 01:32:41,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:32:41,135 INFO L87 Difference]: Start difference. First operand 510 states and 582 transitions. Second operand has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:52,533 INFO L93 Difference]: Finished difference Result 889 states and 1039 transitions. [2022-02-15 01:32:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:32:52,533 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-02-15 01:32:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:52,536 INFO L225 Difference]: With dead ends: 889 [2022-02-15 01:32:52,536 INFO L226 Difference]: Without dead ends: 528 [2022-02-15 01:32:52,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=648, Invalid=20814, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:32:52,538 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 779 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36382 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 37014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 36382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:52,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 212 Invalid, 37014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 36382 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-02-15 01:32:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-02-15 01:32:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 517. [2022-02-15 01:32:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 440 states have (on average 1.0068181818181818) internal successors, (443), 440 states have internal predecessors, (443), 74 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-02-15 01:32:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 590 transitions. [2022-02-15 01:32:52,821 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 590 transitions. Word has length 156 [2022-02-15 01:32:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:52,821 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 590 transitions. [2022-02-15 01:32:52,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 590 transitions. [2022-02-15 01:32:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-15 01:32:52,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:52,822 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:52,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:32:52,822 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:52,822 INFO L85 PathProgramCache]: Analyzing trace with hash -258994378, now seen corresponding path program 72 times [2022-02-15 01:32:52,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:52,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839816859] [2022-02-15 01:32:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:52,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:32:52,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:32:52,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:52,828 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:55,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:55,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:55,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839816859] [2022-02-15 01:32:55,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839816859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:55,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:55,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 01:32:55,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74516165] [2022-02-15 01:32:55,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:55,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 01:32:55,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 01:32:55,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:32:55,109 INFO L87 Difference]: Start difference. First operand 517 states and 590 transitions. Second operand has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:33:08,628 INFO L93 Difference]: Finished difference Result 901 states and 1053 transitions. [2022-02-15 01:33:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 01:33:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-02-15 01:33:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:33:08,630 INFO L225 Difference]: With dead ends: 901 [2022-02-15 01:33:08,631 INFO L226 Difference]: Without dead ends: 535 [2022-02-15 01:33:08,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=657, Invalid=21395, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 01:33:08,632 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 682 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 40277 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 40846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 40277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:33:08,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 394 Invalid, 40846 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [569 Valid, 40277 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-02-15 01:33:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-15 01:33:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 524. [2022-02-15 01:33:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 446 states have (on average 1.006726457399103) internal successors, (449), 446 states have internal predecessors, (449), 75 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-15 01:33:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 598 transitions. [2022-02-15 01:33:08,899 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 598 transitions. Word has length 158 [2022-02-15 01:33:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:33:08,899 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 598 transitions. [2022-02-15 01:33:08,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 598 transitions. [2022-02-15 01:33:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-15 01:33:08,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:33:08,900 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:33:08,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:33:08,900 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:33:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:33:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1493511656, now seen corresponding path program 73 times [2022-02-15 01:33:08,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:33:08,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676159918] [2022-02-15 01:33:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:33:08,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:33:08,902 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:33:08,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:33:08,905 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:33:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:33:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:33:10,991 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:33:10,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676159918] [2022-02-15 01:33:10,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676159918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:33:10,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:33:10,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-15 01:33:10,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475681656] [2022-02-15 01:33:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:33:10,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-15 01:33:10,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:33:10,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-15 01:33:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:33:10,993 INFO L87 Difference]: Start difference. First operand 524 states and 598 transitions. Second operand has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:33:26,204 INFO L93 Difference]: Finished difference Result 913 states and 1067 transitions. [2022-02-15 01:33:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 01:33:26,204 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-02-15 01:33:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:33:26,206 INFO L225 Difference]: With dead ends: 913 [2022-02-15 01:33:26,206 INFO L226 Difference]: Without dead ends: 542 [2022-02-15 01:33:26,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=666, Invalid=21984, Unknown=0, NotChecked=0, Total=22650 [2022-02-15 01:33:26,208 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 708 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 40937 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 41525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 40937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:33:26,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 371 Invalid, 41525 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [588 Valid, 40937 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2022-02-15 01:33:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-02-15 01:33:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 531. [2022-02-15 01:33:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 452 states have (on average 1.0066371681415929) internal successors, (455), 452 states have internal predecessors, (455), 76 states have call successors, (76), 3 states have call predecessors, (76), 2 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-15 01:33:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 606 transitions. [2022-02-15 01:33:26,482 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 606 transitions. Word has length 160 [2022-02-15 01:33:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:33:26,482 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 606 transitions. [2022-02-15 01:33:26,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 606 transitions. [2022-02-15 01:33:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-02-15 01:33:26,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:33:26,483 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:33:26,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:33:26,483 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:33:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:33:26,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1841325178, now seen corresponding path program 74 times [2022-02-15 01:33:26,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:33:26,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329764973] [2022-02-15 01:33:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:33:26,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:33:26,485 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:33:26,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:33:26,488 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:33:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:28,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:33:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:33:28,484 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:33:28,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329764973] [2022-02-15 01:33:28,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [329764973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:33:28,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:33:28,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-15 01:33:28,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765631243] [2022-02-15 01:33:28,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:33:28,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-15 01:33:28,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:33:28,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-15 01:33:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:33:28,486 INFO L87 Difference]: Start difference. First operand 531 states and 606 transitions. Second operand has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:42,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:33:42,342 INFO L93 Difference]: Finished difference Result 925 states and 1081 transitions. [2022-02-15 01:33:42,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 01:33:42,342 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-02-15 01:33:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:33:42,344 INFO L225 Difference]: With dead ends: 925 [2022-02-15 01:33:42,344 INFO L226 Difference]: Without dead ends: 549 [2022-02-15 01:33:42,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=675, Invalid=22581, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 01:33:42,346 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 671 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 43323 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 43888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 43323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:33:42,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 453 Invalid, 43888 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [565 Valid, 43323 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-02-15 01:33:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-02-15 01:33:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 538. [2022-02-15 01:33:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 458 states have (on average 1.0065502183406114) internal successors, (461), 458 states have internal predecessors, (461), 77 states have call successors, (77), 3 states have call predecessors, (77), 2 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-02-15 01:33:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 614 transitions. [2022-02-15 01:33:42,625 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 614 transitions. Word has length 162 [2022-02-15 01:33:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:33:42,625 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 614 transitions. [2022-02-15 01:33:42,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:42,626 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 614 transitions. [2022-02-15 01:33:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-02-15 01:33:42,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:33:42,626 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:33:42,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 01:33:42,626 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:33:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:33:42,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1721047460, now seen corresponding path program 75 times [2022-02-15 01:33:42,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:33:42,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121194847] [2022-02-15 01:33:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:33:42,628 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:33:42,628 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:33:42,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:33:42,631 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:33:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:44,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:33:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:33:44,814 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:33:44,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121194847] [2022-02-15 01:33:44,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [121194847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:33:44,815 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:33:44,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-15 01:33:44,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190129811] [2022-02-15 01:33:44,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:33:44,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-15 01:33:44,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:33:44,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-15 01:33:44,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:33:44,816 INFO L87 Difference]: Start difference. First operand 538 states and 614 transitions. Second operand has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:33:57,930 INFO L93 Difference]: Finished difference Result 937 states and 1095 transitions. [2022-02-15 01:33:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 01:33:57,930 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-02-15 01:33:57,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:33:57,932 INFO L225 Difference]: With dead ends: 937 [2022-02-15 01:33:57,932 INFO L226 Difference]: Without dead ends: 556 [2022-02-15 01:33:57,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=684, Invalid=23186, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 01:33:57,934 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 700 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 43929 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 44515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 43929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:33:57,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 425 Invalid, 44515 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [586 Valid, 43929 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-02-15 01:33:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-02-15 01:33:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 545. [2022-02-15 01:33:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 464 states have (on average 1.0064655172413792) internal successors, (467), 464 states have internal predecessors, (467), 78 states have call successors, (78), 3 states have call predecessors, (78), 2 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2022-02-15 01:33:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 622 transitions. [2022-02-15 01:33:58,235 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 622 transitions. Word has length 164 [2022-02-15 01:33:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:33:58,235 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 622 transitions. [2022-02-15 01:33:58,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 622 transitions. [2022-02-15 01:33:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-02-15 01:33:58,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:33:58,236 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:33:58,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 01:33:58,236 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:33:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:33:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2072217666, now seen corresponding path program 76 times [2022-02-15 01:33:58,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:33:58,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361621800] [2022-02-15 01:33:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:33:58,238 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:33:58,238 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:33:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:33:58,241 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:33:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:00,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:34:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:34:00,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:34:00,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361621800] [2022-02-15 01:34:00,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361621800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:34:00,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:34:00,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 01:34:00,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184467559] [2022-02-15 01:34:00,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:34:00,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 01:34:00,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:34:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 01:34:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:34:00,325 INFO L87 Difference]: Start difference. First operand 545 states and 622 transitions. Second operand has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:34:13,173 INFO L93 Difference]: Finished difference Result 949 states and 1109 transitions. [2022-02-15 01:34:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 01:34:13,173 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-02-15 01:34:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:34:13,175 INFO L225 Difference]: With dead ends: 949 [2022-02-15 01:34:13,175 INFO L226 Difference]: Without dead ends: 563 [2022-02-15 01:34:13,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=693, Invalid=23799, Unknown=0, NotChecked=0, Total=24492 [2022-02-15 01:34:13,177 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 681 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 45881 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 46456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 45881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:34:13,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 477 Invalid, 46456 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [575 Valid, 45881 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-02-15 01:34:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-15 01:34:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 552. [2022-02-15 01:34:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 470 states have (on average 1.0063829787234042) internal successors, (473), 470 states have internal predecessors, (473), 79 states have call successors, (79), 3 states have call predecessors, (79), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-02-15 01:34:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 630 transitions. [2022-02-15 01:34:13,490 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 630 transitions. Word has length 166 [2022-02-15 01:34:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:34:13,490 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 630 transitions. [2022-02-15 01:34:13,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:13,491 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 630 transitions. [2022-02-15 01:34:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-15 01:34:13,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:34:13,491 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:34:13,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 01:34:13,492 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:34:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:34:13,492 INFO L85 PathProgramCache]: Analyzing trace with hash -244369248, now seen corresponding path program 77 times [2022-02-15 01:34:13,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:34:13,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902228732] [2022-02-15 01:34:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:34:13,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:34:13,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:34:13,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:34:13,497 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:34:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:15,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:34:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:34:15,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:34:15,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902228732] [2022-02-15 01:34:15,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [902228732] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:34:15,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:34:15,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-15 01:34:15,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340024718] [2022-02-15 01:34:15,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:34:15,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-15 01:34:15,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:34:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-15 01:34:15,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:34:15,281 INFO L87 Difference]: Start difference. First operand 552 states and 630 transitions. Second operand has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:34:29,264 INFO L93 Difference]: Finished difference Result 961 states and 1123 transitions. [2022-02-15 01:34:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 01:34:29,265 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-02-15 01:34:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:34:29,267 INFO L225 Difference]: With dead ends: 961 [2022-02-15 01:34:29,267 INFO L226 Difference]: Without dead ends: 570 [2022-02-15 01:34:29,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=702, Invalid=24420, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 01:34:29,269 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 674 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 47527 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 48099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 47527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:34:29,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 509 Invalid, 48099 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [572 Valid, 47527 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-02-15 01:34:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-15 01:34:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 559. [2022-02-15 01:34:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 476 states have (on average 1.0063025210084033) internal successors, (479), 476 states have internal predecessors, (479), 80 states have call successors, (80), 3 states have call predecessors, (80), 2 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-02-15 01:34:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 638 transitions. [2022-02-15 01:34:29,597 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 638 transitions. Word has length 168 [2022-02-15 01:34:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:34:29,597 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 638 transitions. [2022-02-15 01:34:29,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 638 transitions. [2022-02-15 01:34:29,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-02-15 01:34:29,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:34:29,598 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:34:29,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 01:34:29,598 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:34:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:34:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash -323663614, now seen corresponding path program 78 times [2022-02-15 01:34:29,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:34:29,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025920261] [2022-02-15 01:34:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:34:29,600 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:34:29,600 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:34:29,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:34:29,604 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:34:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:31,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:34:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:34:31,317 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:34:31,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025920261] [2022-02-15 01:34:31,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025920261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:34:31,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:34:31,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-15 01:34:31,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806011032] [2022-02-15 01:34:31,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:34:31,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-15 01:34:31,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:34:31,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-15 01:34:31,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 01:34:31,320 INFO L87 Difference]: Start difference. First operand 559 states and 638 transitions. Second operand has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:34:44,445 INFO L93 Difference]: Finished difference Result 973 states and 1137 transitions. [2022-02-15 01:34:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 01:34:44,445 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-02-15 01:34:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:34:44,447 INFO L225 Difference]: With dead ends: 973 [2022-02-15 01:34:44,447 INFO L226 Difference]: Without dead ends: 577 [2022-02-15 01:34:44,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=711, Invalid=25049, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 01:34:44,450 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 682 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 48769 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 49348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 48769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:34:44,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 516 Invalid, 49348 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [579 Valid, 48769 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-02-15 01:34:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-02-15 01:34:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 566. [2022-02-15 01:34:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 482 states have (on average 1.0062240663900415) internal successors, (485), 482 states have internal predecessors, (485), 81 states have call successors, (81), 3 states have call predecessors, (81), 2 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-02-15 01:34:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 646 transitions. [2022-02-15 01:34:44,803 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 646 transitions. Word has length 170 [2022-02-15 01:34:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:34:44,803 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 646 transitions. [2022-02-15 01:34:44,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 646 transitions. [2022-02-15 01:34:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-02-15 01:34:44,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:34:44,813 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:34:44,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 01:34:44,814 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:34:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:34:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash 783861988, now seen corresponding path program 79 times [2022-02-15 01:34:44,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:34:44,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104336350] [2022-02-15 01:34:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:34:44,815 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:34:44,815 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:34:44,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:34:44,820 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:34:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:47,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:34:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:34:47,504 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:34:47,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104336350] [2022-02-15 01:34:47,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [104336350] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:34:47,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:34:47,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-15 01:34:47,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167888625] [2022-02-15 01:34:47,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:34:47,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-15 01:34:47,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:34:47,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-15 01:34:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:34:47,506 INFO L87 Difference]: Start difference. First operand 566 states and 646 transitions. Second operand has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:35:04,769 INFO L93 Difference]: Finished difference Result 985 states and 1151 transitions. [2022-02-15 01:35:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 01:35:04,770 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-02-15 01:35:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:35:04,776 INFO L225 Difference]: With dead ends: 985 [2022-02-15 01:35:04,776 INFO L226 Difference]: Without dead ends: 584 [2022-02-15 01:35:04,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=720, Invalid=25686, Unknown=0, NotChecked=0, Total=26406 [2022-02-15 01:35:04,779 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 840 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 45677 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 46363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 45677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:35:04,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 273 Invalid, 46363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [686 Valid, 45677 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2022-02-15 01:35:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-02-15 01:35:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 573. [2022-02-15 01:35:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 488 states have (on average 1.0061475409836065) internal successors, (491), 488 states have internal predecessors, (491), 82 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-02-15 01:35:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 654 transitions. [2022-02-15 01:35:05,108 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 654 transitions. Word has length 172 [2022-02-15 01:35:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:35:05,108 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 654 transitions. [2022-02-15 01:35:05,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 654 transitions. [2022-02-15 01:35:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-02-15 01:35:05,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:35:05,109 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:35:05,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 01:35:05,109 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:35:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:35:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash -35923898, now seen corresponding path program 80 times [2022-02-15 01:35:05,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:35:05,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238146853] [2022-02-15 01:35:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:35:05,110 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:35:05,111 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:35:05,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:35:05,114 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:35:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:07,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:35:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:35:07,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:35:07,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238146853] [2022-02-15 01:35:07,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238146853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:35:07,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:35:07,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-15 01:35:07,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505832840] [2022-02-15 01:35:07,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:35:07,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-15 01:35:07,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:35:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-15 01:35:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 01:35:07,600 INFO L87 Difference]: Start difference. First operand 573 states and 654 transitions. Second operand has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:35:21,904 INFO L93 Difference]: Finished difference Result 997 states and 1165 transitions. [2022-02-15 01:35:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 01:35:21,905 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-02-15 01:35:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:35:21,907 INFO L225 Difference]: With dead ends: 997 [2022-02-15 01:35:21,907 INFO L226 Difference]: Without dead ends: 591 [2022-02-15 01:35:21,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=729, Invalid=26331, Unknown=0, NotChecked=0, Total=27060 [2022-02-15 01:35:21,909 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 887 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 45757 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 46476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 45757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:35:21,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 215 Invalid, 46476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [719 Valid, 45757 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-02-15 01:35:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-02-15 01:35:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2022-02-15 01:35:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 494 states have (on average 1.0060728744939271) internal successors, (497), 494 states have internal predecessors, (497), 83 states have call successors, (83), 3 states have call predecessors, (83), 2 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-02-15 01:35:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 662 transitions. [2022-02-15 01:35:22,280 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 662 transitions. Word has length 174 [2022-02-15 01:35:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:35:22,280 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 662 transitions. [2022-02-15 01:35:22,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 662 transitions. [2022-02-15 01:35:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-02-15 01:35:22,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:35:22,281 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:35:22,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 01:35:22,281 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:35:22,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:35:22,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1871145176, now seen corresponding path program 81 times [2022-02-15 01:35:22,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:35:22,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883677993] [2022-02-15 01:35:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:35:22,283 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:35:22,283 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:35:22,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:35:22,287 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:35:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:24,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:35:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:35:24,083 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:35:24,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883677993] [2022-02-15 01:35:24,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1883677993] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:35:24,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:35:24,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-15 01:35:24,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767964939] [2022-02-15 01:35:24,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:35:24,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-15 01:35:24,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:35:24,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-15 01:35:24,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 01:35:24,085 INFO L87 Difference]: Start difference. First operand 580 states and 662 transitions. Second operand has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 84 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:35:37,478 INFO L93 Difference]: Finished difference Result 1009 states and 1179 transitions. [2022-02-15 01:35:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 01:35:37,479 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 84 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-02-15 01:35:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:35:37,481 INFO L225 Difference]: With dead ends: 1009 [2022-02-15 01:35:37,481 INFO L226 Difference]: Without dead ends: 598 [2022-02-15 01:35:37,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=738, Invalid=26984, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 01:35:37,483 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 856 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 48141 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 48841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 48141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:35:37,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 287 Invalid, 48841 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [700 Valid, 48141 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-02-15 01:35:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-02-15 01:35:37,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 587. [2022-02-15 01:35:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 500 states have (on average 1.006) internal successors, (503), 500 states have internal predecessors, (503), 84 states have call successors, (84), 3 states have call predecessors, (84), 2 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-15 01:35:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 670 transitions. [2022-02-15 01:35:37,826 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 670 transitions. Word has length 176 [2022-02-15 01:35:37,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:35:37,826 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 670 transitions. [2022-02-15 01:35:37,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 84 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 670 transitions. [2022-02-15 01:35:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-02-15 01:35:37,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:35:37,827 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:35:37,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 01:35:37,827 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:35:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:35:37,827 INFO L85 PathProgramCache]: Analyzing trace with hash -287234678, now seen corresponding path program 82 times [2022-02-15 01:35:37,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:35:37,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824244033] [2022-02-15 01:35:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:35:37,830 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:35:37,830 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:35:37,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:35:37,835 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:35:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:40,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:35:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:35:40,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:35:40,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824244033] [2022-02-15 01:35:40,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [824244033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:35:40,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:35:40,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-15 01:35:40,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653478223] [2022-02-15 01:35:40,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:35:40,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-15 01:35:40,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:35:40,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-15 01:35:40,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 01:35:40,179 INFO L87 Difference]: Start difference. First operand 587 states and 670 transitions. Second operand has 86 states, 86 states have (on average 2.0232558139534884) internal successors, (174), 85 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:35:54,037 INFO L93 Difference]: Finished difference Result 1021 states and 1193 transitions. [2022-02-15 01:35:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-15 01:35:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0232558139534884) internal successors, (174), 85 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-02-15 01:35:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:35:54,039 INFO L225 Difference]: With dead ends: 1021 [2022-02-15 01:35:54,039 INFO L226 Difference]: Without dead ends: 605 [2022-02-15 01:35:54,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=747, Invalid=27645, Unknown=0, NotChecked=0, Total=28392 [2022-02-15 01:35:54,041 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 837 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 50207 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 50896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 50207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:35:54,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 339 Invalid, 50896 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [689 Valid, 50207 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-02-15 01:35:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-02-15 01:35:54,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 594. [2022-02-15 01:35:54,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 506 states have (on average 1.0059288537549407) internal successors, (509), 506 states have internal predecessors, (509), 85 states have call successors, (85), 3 states have call predecessors, (85), 2 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-02-15 01:35:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 678 transitions. [2022-02-15 01:35:54,384 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 678 transitions. Word has length 178 [2022-02-15 01:35:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:35:54,385 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 678 transitions. [2022-02-15 01:35:54,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0232558139534884) internal successors, (174), 85 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 678 transitions. [2022-02-15 01:35:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-02-15 01:35:54,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:35:54,385 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:35:54,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 01:35:54,386 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:35:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:35:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1432331116, now seen corresponding path program 83 times [2022-02-15 01:35:54,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:35:54,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425840177] [2022-02-15 01:35:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:35:54,387 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:35:54,387 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:35:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:35:54,392 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:35:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:35:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:35:56,822 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:35:56,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425840177] [2022-02-15 01:35:56,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [425840177] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:35:56,822 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:35:56,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-15 01:35:56,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876597564] [2022-02-15 01:35:56,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:35:56,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-15 01:35:56,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:35:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-15 01:35:56,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:35:56,832 INFO L87 Difference]: Start difference. First operand 594 states and 678 transitions. Second operand has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:10,569 INFO L93 Difference]: Finished difference Result 1033 states and 1207 transitions. [2022-02-15 01:36:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 01:36:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-02-15 01:36:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:10,571 INFO L225 Difference]: With dead ends: 1033 [2022-02-15 01:36:10,571 INFO L226 Difference]: Without dead ends: 612 [2022-02-15 01:36:10,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=756, Invalid=28314, Unknown=0, NotChecked=0, Total=29070 [2022-02-15 01:36:10,573 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 917 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 49304 mSolverCounterSat, 744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 50048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 49304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:10,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 226 Invalid, 50048 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [744 Valid, 49304 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-02-15 01:36:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-02-15 01:36:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 601. [2022-02-15 01:36:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 512 states have (on average 1.005859375) internal successors, (515), 512 states have internal predecessors, (515), 86 states have call successors, (86), 3 states have call predecessors, (86), 2 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-15 01:36:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 686 transitions. [2022-02-15 01:36:10,941 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 686 transitions. Word has length 180 [2022-02-15 01:36:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:10,942 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 686 transitions. [2022-02-15 01:36:10,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 686 transitions. [2022-02-15 01:36:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-15 01:36:10,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:10,943 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:10,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 01:36:10,943 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash 372650190, now seen corresponding path program 84 times [2022-02-15 01:36:10,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:10,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268666975] [2022-02-15 01:36:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:10,945 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:10,945 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:36:10,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:10,951 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:36:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:13,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:13,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:13,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268666975] [2022-02-15 01:36:13,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268666975] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:13,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:13,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-15 01:36:13,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611536810] [2022-02-15 01:36:13,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:13,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-15 01:36:13,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-15 01:36:13,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 01:36:13,839 INFO L87 Difference]: Start difference. First operand 601 states and 686 transitions. Second operand has 88 states, 88 states have (on average 2.022727272727273) internal successors, (178), 87 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:31,825 INFO L93 Difference]: Finished difference Result 1045 states and 1221 transitions. [2022-02-15 01:36:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 01:36:31,825 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.022727272727273) internal successors, (178), 87 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-02-15 01:36:31,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:31,827 INFO L225 Difference]: With dead ends: 1045 [2022-02-15 01:36:31,827 INFO L226 Difference]: Without dead ends: 619 [2022-02-15 01:36:31,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=765, Invalid=28991, Unknown=0, NotChecked=0, Total=29756 [2022-02-15 01:36:31,829 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 883 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 51865 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 52588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 51865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:31,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 303 Invalid, 52588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [723 Valid, 51865 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2022-02-15 01:36:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-15 01:36:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 608. [2022-02-15 01:36:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 518 states have (on average 1.005791505791506) internal successors, (521), 518 states have internal predecessors, (521), 87 states have call successors, (87), 3 states have call predecessors, (87), 2 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-02-15 01:36:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 694 transitions. [2022-02-15 01:36:32,193 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 694 transitions. Word has length 182 [2022-02-15 01:36:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:32,193 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 694 transitions. [2022-02-15 01:36:32,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.022727272727273) internal successors, (178), 87 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 694 transitions. [2022-02-15 01:36:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-02-15 01:36:32,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:32,194 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:32,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 01:36:32,195 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash -73470544, now seen corresponding path program 85 times [2022-02-15 01:36:32,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:32,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993591338] [2022-02-15 01:36:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:32,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:32,196 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:36:32,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:32,200 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:36:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:34,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:34,649 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:34,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993591338] [2022-02-15 01:36:34,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [993591338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:34,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:34,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-15 01:36:34,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6514374] [2022-02-15 01:36:34,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:34,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-15 01:36:34,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:34,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-15 01:36:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 01:36:34,651 INFO L87 Difference]: Start difference. First operand 608 states and 694 transitions. Second operand has 89 states, 89 states have (on average 2.0224719101123596) internal successors, (180), 88 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:49,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:49,064 INFO L93 Difference]: Finished difference Result 1057 states and 1235 transitions. [2022-02-15 01:36:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-15 01:36:49,064 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0224719101123596) internal successors, (180), 88 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-02-15 01:36:49,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:49,066 INFO L225 Difference]: With dead ends: 1057 [2022-02-15 01:36:49,066 INFO L226 Difference]: Without dead ends: 626 [2022-02-15 01:36:49,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3656 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=774, Invalid=29676, Unknown=0, NotChecked=0, Total=30450 [2022-02-15 01:36:49,069 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 837 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 54842 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 55536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 54842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:49,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 400 Invalid, 55536 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [694 Valid, 54842 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-02-15 01:36:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-02-15 01:36:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 615. [2022-02-15 01:36:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 524 states have (on average 1.0057251908396947) internal successors, (527), 524 states have internal predecessors, (527), 88 states have call successors, (88), 3 states have call predecessors, (88), 2 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2022-02-15 01:36:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 702 transitions. [2022-02-15 01:36:49,454 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 702 transitions. Word has length 184 [2022-02-15 01:36:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:49,454 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 702 transitions. [2022-02-15 01:36:49,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0224719101123596) internal successors, (180), 88 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 702 transitions. [2022-02-15 01:36:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-02-15 01:36:49,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:49,455 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:49,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 01:36:49,455 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:49,456 INFO L85 PathProgramCache]: Analyzing trace with hash 701233682, now seen corresponding path program 86 times [2022-02-15 01:36:49,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:49,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364431818] [2022-02-15 01:36:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:49,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:49,458 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:36:49,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:49,462 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:36:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:51,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:51,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:51,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364431818] [2022-02-15 01:36:51,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1364431818] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:51,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:51,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-15 01:36:51,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18993285] [2022-02-15 01:36:51,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:51,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-15 01:36:51,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-15 01:36:51,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7747, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 01:36:51,572 INFO L87 Difference]: Start difference. First operand 615 states and 702 transitions. Second operand has 90 states, 90 states have (on average 2.022222222222222) internal successors, (182), 89 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:05,674 INFO L93 Difference]: Finished difference Result 1069 states and 1249 transitions. [2022-02-15 01:37:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-15 01:37:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.022222222222222) internal successors, (182), 89 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-02-15 01:37:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:05,676 INFO L225 Difference]: With dead ends: 1069 [2022-02-15 01:37:05,676 INFO L226 Difference]: Without dead ends: 633 [2022-02-15 01:37:05,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=783, Invalid=30369, Unknown=0, NotChecked=0, Total=31152 [2022-02-15 01:37:05,678 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 968 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52325 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 53108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 52325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:05,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 202 Invalid, 53108 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [783 Valid, 52325 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-02-15 01:37:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-15 01:37:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 622. [2022-02-15 01:37:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 530 states have (on average 1.0056603773584907) internal successors, (533), 530 states have internal predecessors, (533), 89 states have call successors, (89), 3 states have call predecessors, (89), 2 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-02-15 01:37:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 710 transitions. [2022-02-15 01:37:06,083 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 710 transitions. Word has length 186 [2022-02-15 01:37:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:06,084 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 710 transitions. [2022-02-15 01:37:06,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.022222222222222) internal successors, (182), 89 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 710 transitions. [2022-02-15 01:37:06,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-02-15 01:37:06,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:06,084 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:06,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 01:37:06,085 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:06,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:06,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2132314636, now seen corresponding path program 87 times [2022-02-15 01:37:06,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:06,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489906345] [2022-02-15 01:37:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:06,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:06,086 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:37:06,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:06,091 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:37:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:08,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:08,500 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:08,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489906345] [2022-02-15 01:37:08,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489906345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:08,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:08,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-15 01:37:08,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549996598] [2022-02-15 01:37:08,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:08,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-15 01:37:08,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-15 01:37:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 01:37:08,501 INFO L87 Difference]: Start difference. First operand 622 states and 710 transitions. Second operand has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 90 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:25,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:25,493 INFO L93 Difference]: Finished difference Result 1081 states and 1263 transitions. [2022-02-15 01:37:25,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-15 01:37:25,493 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 90 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-02-15 01:37:25,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:25,495 INFO L225 Difference]: With dead ends: 1081 [2022-02-15 01:37:25,495 INFO L226 Difference]: Without dead ends: 640 [2022-02-15 01:37:25,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=792, Invalid=31070, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 01:37:25,497 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 865 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 57152 mSolverCounterSat, 716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 57868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 57152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:25,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 394 Invalid, 57868 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [716 Valid, 57152 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2022-02-15 01:37:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-02-15 01:37:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 629. [2022-02-15 01:37:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 536 states have (on average 1.0055970149253732) internal successors, (539), 536 states have internal predecessors, (539), 90 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-02-15 01:37:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 718 transitions. [2022-02-15 01:37:25,924 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 718 transitions. Word has length 188 [2022-02-15 01:37:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:25,924 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 718 transitions. [2022-02-15 01:37:25,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 90 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 718 transitions. [2022-02-15 01:37:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-02-15 01:37:25,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:25,925 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:25,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 01:37:25,925 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2131984726, now seen corresponding path program 88 times [2022-02-15 01:37:25,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:25,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975285887] [2022-02-15 01:37:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:25,928 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:25,928 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:37:25,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:25,932 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:37:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:28,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:28,660 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:28,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975285887] [2022-02-15 01:37:28,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [975285887] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:28,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:28,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-15 01:37:28,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592945582] [2022-02-15 01:37:28,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:28,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-15 01:37:28,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-15 01:37:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=8103, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 01:37:28,663 INFO L87 Difference]: Start difference. First operand 629 states and 718 transitions. Second operand has 92 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 91 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:46,365 INFO L93 Difference]: Finished difference Result 1093 states and 1277 transitions. [2022-02-15 01:37:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 01:37:46,365 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 91 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-02-15 01:37:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:46,371 INFO L225 Difference]: With dead ends: 1093 [2022-02-15 01:37:46,371 INFO L226 Difference]: Without dead ends: 647 [2022-02-15 01:37:46,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=801, Invalid=31779, Unknown=0, NotChecked=0, Total=32580 [2022-02-15 01:37:46,373 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 831 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 59861 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 60556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 59861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:46,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 471 Invalid, 60556 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [695 Valid, 59861 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2022-02-15 01:37:46,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-02-15 01:37:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 636. [2022-02-15 01:37:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 542 states have (on average 1.0055350553505535) internal successors, (545), 542 states have internal predecessors, (545), 91 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2022-02-15 01:37:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 726 transitions. [2022-02-15 01:37:46,781 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 726 transitions. Word has length 190 [2022-02-15 01:37:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:46,781 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 726 transitions. [2022-02-15 01:37:46,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 91 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 726 transitions. [2022-02-15 01:37:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-02-15 01:37:46,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:46,783 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:46,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 01:37:46,783 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:46,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:46,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1570096072, now seen corresponding path program 89 times [2022-02-15 01:37:46,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:46,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935652056] [2022-02-15 01:37:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:46,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:46,785 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:37:46,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:46,789 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:37:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:49,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:49,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:49,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935652056] [2022-02-15 01:37:49,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [935652056] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:49,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:49,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-15 01:37:49,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459628340] [2022-02-15 01:37:49,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:49,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-15 01:37:49,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:49,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-15 01:37:49,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=8284, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:37:49,600 INFO L87 Difference]: Start difference. First operand 636 states and 726 transitions. Second operand has 93 states, 93 states have (on average 2.021505376344086) internal successors, (188), 92 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:06,200 INFO L93 Difference]: Finished difference Result 1105 states and 1291 transitions. [2022-02-15 01:38:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-15 01:38:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.021505376344086) internal successors, (188), 92 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-02-15 01:38:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:06,203 INFO L225 Difference]: With dead ends: 1105 [2022-02-15 01:38:06,203 INFO L226 Difference]: Without dead ends: 654 [2022-02-15 01:38:06,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4006 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=810, Invalid=32496, Unknown=0, NotChecked=0, Total=33306 [2022-02-15 01:38:06,205 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 764 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 63681 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 64333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 63681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:06,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 603 Invalid, 64333 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [652 Valid, 63681 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-02-15 01:38:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-02-15 01:38:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 643. [2022-02-15 01:38:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 548 states have (on average 1.0054744525547445) internal successors, (551), 548 states have internal predecessors, (551), 92 states have call successors, (92), 3 states have call predecessors, (92), 2 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-02-15 01:38:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 734 transitions. [2022-02-15 01:38:06,617 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 734 transitions. Word has length 192 [2022-02-15 01:38:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:06,617 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 734 transitions. [2022-02-15 01:38:06,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.021505376344086) internal successors, (188), 92 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 734 transitions. [2022-02-15 01:38:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-02-15 01:38:06,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:06,618 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:06,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 01:38:06,618 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:06,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1258145434, now seen corresponding path program 90 times [2022-02-15 01:38:06,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:06,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923929041] [2022-02-15 01:38:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:06,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:06,620 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:38:06,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:06,629 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:38:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:10,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:10,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:10,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923929041] [2022-02-15 01:38:10,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1923929041] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:10,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:10,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-15 01:38:10,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648500537] [2022-02-15 01:38:10,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:10,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-15 01:38:10,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-15 01:38:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 01:38:10,055 INFO L87 Difference]: Start difference. First operand 643 states and 734 transitions. Second operand has 94 states, 94 states have (on average 2.021276595744681) internal successors, (190), 93 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:28,416 INFO L93 Difference]: Finished difference Result 1117 states and 1305 transitions. [2022-02-15 01:38:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-15 01:38:28,417 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.021276595744681) internal successors, (190), 93 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-02-15 01:38:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:28,418 INFO L225 Difference]: With dead ends: 1117 [2022-02-15 01:38:28,418 INFO L226 Difference]: Without dead ends: 661 [2022-02-15 01:38:28,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=819, Invalid=33221, Unknown=0, NotChecked=0, Total=34040 [2022-02-15 01:38:28,420 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 916 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 60413 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 61168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 60413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:28,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 370 Invalid, 61168 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [755 Valid, 60413 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-02-15 01:38:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-02-15 01:38:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 650. [2022-02-15 01:38:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 554 states have (on average 1.0054151624548737) internal successors, (557), 554 states have internal predecessors, (557), 93 states have call successors, (93), 3 states have call predecessors, (93), 2 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-02-15 01:38:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 742 transitions. [2022-02-15 01:38:28,867 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 742 transitions. Word has length 194 [2022-02-15 01:38:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:28,867 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 742 transitions. [2022-02-15 01:38:28,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.021276595744681) internal successors, (190), 93 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 742 transitions. [2022-02-15 01:38:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-02-15 01:38:28,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:28,868 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:28,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 01:38:28,868 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash 483934332, now seen corresponding path program 91 times [2022-02-15 01:38:28,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:28,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488195264] [2022-02-15 01:38:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:28,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:28,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:38:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:28,875 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:38:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:31,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:31,159 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:31,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488195264] [2022-02-15 01:38:31,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [488195264] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:31,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:31,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-02-15 01:38:31,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878208488] [2022-02-15 01:38:31,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:31,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-15 01:38:31,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:31,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-15 01:38:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=8652, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:38:31,161 INFO L87 Difference]: Start difference. First operand 650 states and 742 transitions. Second operand has 95 states, 95 states have (on average 2.0210526315789474) internal successors, (192), 94 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:49,258 INFO L93 Difference]: Finished difference Result 1129 states and 1319 transitions. [2022-02-15 01:38:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 01:38:49,259 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0210526315789474) internal successors, (192), 94 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-02-15 01:38:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:49,260 INFO L225 Difference]: With dead ends: 1129 [2022-02-15 01:38:49,260 INFO L226 Difference]: Without dead ends: 668 [2022-02-15 01:38:49,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4187 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=828, Invalid=33954, Unknown=0, NotChecked=0, Total=34782 [2022-02-15 01:38:49,271 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 780 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 66569 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 67235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 66569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:49,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 617 Invalid, 67235 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [666 Valid, 66569 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-02-15 01:38:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-02-15 01:38:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 657. [2022-02-15 01:38:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 560 states have (on average 1.0053571428571428) internal successors, (563), 560 states have internal predecessors, (563), 94 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-02-15 01:38:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 750 transitions. [2022-02-15 01:38:49,731 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 750 transitions. Word has length 196 [2022-02-15 01:38:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:49,731 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 750 transitions. [2022-02-15 01:38:49,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0210526315789474) internal successors, (192), 94 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 750 transitions. [2022-02-15 01:38:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-02-15 01:38:49,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:49,732 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:49,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 01:38:49,732 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash -503592482, now seen corresponding path program 92 times [2022-02-15 01:38:49,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:49,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417846521] [2022-02-15 01:38:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:49,734 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:49,734 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:38:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:49,738 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:38:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:52,547 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:52,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417846521] [2022-02-15 01:38:52,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417846521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:52,547 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:52,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-15 01:38:52,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722950966] [2022-02-15 01:38:52,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:52,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-15 01:38:52,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-15 01:38:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 01:38:52,549 INFO L87 Difference]: Start difference. First operand 657 states and 750 transitions. Second operand has 96 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 95 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:10,423 INFO L93 Difference]: Finished difference Result 1141 states and 1333 transitions. [2022-02-15 01:39:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 01:39:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 95 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-02-15 01:39:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:10,424 INFO L225 Difference]: With dead ends: 1141 [2022-02-15 01:39:10,424 INFO L226 Difference]: Without dead ends: 675 [2022-02-15 01:39:10,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4279 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=837, Invalid=34695, Unknown=0, NotChecked=0, Total=35532 [2022-02-15 01:39:10,427 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 860 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 65637 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 66358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 65637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:10,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 504 Invalid, 66358 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [721 Valid, 65637 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2022-02-15 01:39:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-02-15 01:39:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2022-02-15 01:39:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 566 states have (on average 1.0053003533568905) internal successors, (569), 566 states have internal predecessors, (569), 95 states have call successors, (95), 3 states have call predecessors, (95), 2 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-02-15 01:39:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 758 transitions. [2022-02-15 01:39:10,873 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 758 transitions. Word has length 198 [2022-02-15 01:39:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:10,873 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 758 transitions. [2022-02-15 01:39:10,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 95 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 758 transitions. [2022-02-15 01:39:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-02-15 01:39:10,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:10,874 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:10,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 01:39:10,874 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:10,874 INFO L85 PathProgramCache]: Analyzing trace with hash -329088320, now seen corresponding path program 93 times [2022-02-15 01:39:10,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:10,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848840926] [2022-02-15 01:39:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:10,876 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:10,876 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:39:10,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:10,880 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:13,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:13,249 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:13,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848840926] [2022-02-15 01:39:13,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848840926] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:13,250 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:13,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-15 01:39:13,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676417635] [2022-02-15 01:39:13,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:13,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-15 01:39:13,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-15 01:39:13,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=9028, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:39:13,251 INFO L87 Difference]: Start difference. First operand 664 states and 758 transitions. Second operand has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:29,246 INFO L93 Difference]: Finished difference Result 1153 states and 1347 transitions. [2022-02-15 01:39:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-15 01:39:29,246 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-02-15 01:39:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:29,248 INFO L225 Difference]: With dead ends: 1153 [2022-02-15 01:39:29,248 INFO L226 Difference]: Without dead ends: 682 [2022-02-15 01:39:29,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=846, Invalid=35444, Unknown=0, NotChecked=0, Total=36290 [2022-02-15 01:39:29,250 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 1000 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 62653 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 63469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 62653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:29,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 291 Invalid, 63469 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [816 Valid, 62653 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2022-02-15 01:39:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-15 01:39:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 671. [2022-02-15 01:39:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 572 states have (on average 1.0052447552447552) internal successors, (575), 572 states have internal predecessors, (575), 96 states have call successors, (96), 3 states have call predecessors, (96), 2 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-02-15 01:39:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 766 transitions. [2022-02-15 01:39:29,709 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 766 transitions. Word has length 200 [2022-02-15 01:39:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:29,709 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 766 transitions. [2022-02-15 01:39:29,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 766 transitions. [2022-02-15 01:39:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-02-15 01:39:29,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:29,710 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:29,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 01:39:29,710 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:29,711 INFO L85 PathProgramCache]: Analyzing trace with hash -134313182, now seen corresponding path program 94 times [2022-02-15 01:39:29,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:29,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202253539] [2022-02-15 01:39:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:29,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:29,717 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:39:29,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:29,723 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:32,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:32,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:32,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202253539] [2022-02-15 01:39:32,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [202253539] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:32,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:32,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-15 01:39:32,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074276415] [2022-02-15 01:39:32,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:32,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-15 01:39:32,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:32,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-15 01:39:32,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=9219, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 01:39:32,967 INFO L87 Difference]: Start difference. First operand 671 states and 766 transitions. Second operand has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:57,659 INFO L93 Difference]: Finished difference Result 1165 states and 1361 transitions. [2022-02-15 01:39:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-15 01:39:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-02-15 01:39:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:57,661 INFO L225 Difference]: With dead ends: 1165 [2022-02-15 01:39:57,661 INFO L226 Difference]: Without dead ends: 689 [2022-02-15 01:39:57,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4466 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=855, Invalid=36201, Unknown=0, NotChecked=0, Total=37056 [2022-02-15 01:39:57,663 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 963 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 65615 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 66408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 65615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:57,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 373 Invalid, 66408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [793 Valid, 65615 Invalid, 0 Unknown, 0 Unchecked, 20.1s Time] [2022-02-15 01:39:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-02-15 01:39:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 678. [2022-02-15 01:39:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 578 states have (on average 1.005190311418685) internal successors, (581), 578 states have internal predecessors, (581), 97 states have call successors, (97), 3 states have call predecessors, (97), 2 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-02-15 01:39:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 774 transitions. [2022-02-15 01:39:58,144 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 774 transitions. Word has length 202 [2022-02-15 01:39:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:58,144 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 774 transitions. [2022-02-15 01:39:58,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 774 transitions. [2022-02-15 01:39:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-15 01:39:58,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:58,145 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:58,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 01:39:58,145 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1933966588, now seen corresponding path program 95 times [2022-02-15 01:39:58,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:58,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880058399] [2022-02-15 01:39:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:58,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:58,147 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:39:58,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:58,152 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:01,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:01,924 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:01,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880058399] [2022-02-15 01:40:01,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [880058399] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:01,924 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:01,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-15 01:40:01,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174774532] [2022-02-15 01:40:01,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:01,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-15 01:40:01,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:01,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-15 01:40:01,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=9412, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:40:01,926 INFO L87 Difference]: Start difference. First operand 678 states and 774 transitions. Second operand has 99 states, 99 states have (on average 2.0202020202020203) internal successors, (200), 98 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:22,478 INFO L93 Difference]: Finished difference Result 1177 states and 1375 transitions. [2022-02-15 01:40:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 01:40:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0202020202020203) internal successors, (200), 98 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2022-02-15 01:40:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:22,480 INFO L225 Difference]: With dead ends: 1177 [2022-02-15 01:40:22,480 INFO L226 Difference]: Without dead ends: 696 [2022-02-15 01:40:22,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4561 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=864, Invalid=36966, Unknown=0, NotChecked=0, Total=37830 [2022-02-15 01:40:22,482 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 992 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 66357 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 67171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 66357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:22,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 345 Invalid, 67171 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [814 Valid, 66357 Invalid, 0 Unknown, 0 Unchecked, 16.3s Time] [2022-02-15 01:40:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-02-15 01:40:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 685. [2022-02-15 01:40:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 584 states have (on average 1.00513698630137) internal successors, (587), 584 states have internal predecessors, (587), 98 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-02-15 01:40:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 782 transitions. [2022-02-15 01:40:22,959 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 782 transitions. Word has length 204 [2022-02-15 01:40:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:22,959 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 782 transitions. [2022-02-15 01:40:22,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0202020202020203) internal successors, (200), 98 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 782 transitions. [2022-02-15 01:40:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-02-15 01:40:22,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:22,960 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:22,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 01:40:22,960 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash -529069466, now seen corresponding path program 96 times [2022-02-15 01:40:22,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:22,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992797726] [2022-02-15 01:40:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:22,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:22,962 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:40:22,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:22,970 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:26,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:26,847 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:26,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992797726] [2022-02-15 01:40:26,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992797726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:26,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:26,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-15 01:40:26,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392916049] [2022-02-15 01:40:26,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:26,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-15 01:40:26,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:26,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-15 01:40:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9607, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 01:40:26,849 INFO L87 Difference]: Start difference. First operand 685 states and 782 transitions. Second operand has 100 states, 100 states have (on average 2.02) internal successors, (202), 99 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:49,105 INFO L93 Difference]: Finished difference Result 1189 states and 1389 transitions. [2022-02-15 01:40:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-15 01:40:49,106 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.02) internal successors, (202), 99 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-02-15 01:40:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:49,107 INFO L225 Difference]: With dead ends: 1189 [2022-02-15 01:40:49,107 INFO L226 Difference]: Without dead ends: 703 [2022-02-15 01:40:49,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=873, Invalid=37739, Unknown=0, NotChecked=0, Total=38612 [2022-02-15 01:40:49,111 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 820 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 74069 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 74770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 74069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:49,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 652 Invalid, 74770 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [701 Valid, 74069 Invalid, 0 Unknown, 0 Unchecked, 17.4s Time] [2022-02-15 01:40:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-02-15 01:40:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 692. [2022-02-15 01:40:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 590 states have (on average 1.005084745762712) internal successors, (593), 590 states have internal predecessors, (593), 99 states have call successors, (99), 3 states have call predecessors, (99), 2 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2022-02-15 01:40:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 790 transitions. [2022-02-15 01:40:49,591 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 790 transitions. Word has length 206 [2022-02-15 01:40:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:49,592 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 790 transitions. [2022-02-15 01:40:49,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.02) internal successors, (202), 99 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 790 transitions. [2022-02-15 01:40:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-02-15 01:40:49,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:49,592 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:49,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-15 01:40:49,593 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash 957333832, now seen corresponding path program 97 times [2022-02-15 01:40:49,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:49,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396093028] [2022-02-15 01:40:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:49,594 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:49,594 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:40:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:49,624 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:53,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:53,563 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:53,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396093028] [2022-02-15 01:40:53,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1396093028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:53,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:53,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-15 01:40:53,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011309875] [2022-02-15 01:40:53,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:53,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-15 01:40:53,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-15 01:40:53,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=9804, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 01:40:53,564 INFO L87 Difference]: Start difference. First operand 692 states and 790 transitions. Second operand has 101 states, 101 states have (on average 2.01980198019802) internal successors, (204), 100 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:20,212 INFO L93 Difference]: Finished difference Result 1201 states and 1403 transitions. [2022-02-15 01:41:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-15 01:41:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.01980198019802) internal successors, (204), 100 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-02-15 01:41:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:20,214 INFO L225 Difference]: With dead ends: 1201 [2022-02-15 01:41:20,214 INFO L226 Difference]: Without dead ends: 710 [2022-02-15 01:41:20,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4754 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=882, Invalid=38520, Unknown=0, NotChecked=0, Total=39402 [2022-02-15 01:41:20,216 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 816 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 76037 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 76737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 76037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:20,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 679 Invalid, 76737 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [700 Valid, 76037 Invalid, 0 Unknown, 0 Unchecked, 21.8s Time] [2022-02-15 01:41:20,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-02-15 01:41:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 699. [2022-02-15 01:41:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 596 states have (on average 1.00503355704698) internal successors, (599), 596 states have internal predecessors, (599), 100 states have call successors, (100), 3 states have call predecessors, (100), 2 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-02-15 01:41:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 798 transitions. [2022-02-15 01:41:20,741 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 798 transitions. Word has length 208 [2022-02-15 01:41:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:20,742 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 798 transitions. [2022-02-15 01:41:20,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.01980198019802) internal successors, (204), 100 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 798 transitions. [2022-02-15 01:41:20,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-02-15 01:41:20,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:20,744 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:20,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-15 01:41:20,744 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:20,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash -833206358, now seen corresponding path program 98 times [2022-02-15 01:41:20,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:20,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100508961] [2022-02-15 01:41:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:20,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:20,749 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:41:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:20,755 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:41:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:24,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:24,728 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:24,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100508961] [2022-02-15 01:41:24,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1100508961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:24,729 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:24,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-15 01:41:24,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884194124] [2022-02-15 01:41:24,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:24,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-15 01:41:24,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-15 01:41:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=10003, Unknown=0, NotChecked=0, Total=10302 [2022-02-15 01:41:24,730 INFO L87 Difference]: Start difference. First operand 699 states and 798 transitions. Second operand has 102 states, 102 states have (on average 2.019607843137255) internal successors, (206), 101 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)