/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:24:22,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:24:22,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:24:22,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 04:24:22,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:24:22,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:24:22,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:24:22,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:24:22,572 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:24:22,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:24:22,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:24:22,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:24:22,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:24:22,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:24:22,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:24:22,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:24:22,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:24:22,574 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:24:22,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:24:22,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:24:22,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:24:22,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:24:22,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:24:22,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:24:22,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:24:22,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:24:22,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:24:22,576 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:24:22,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:24:22,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:24:22,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:24:22,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:24:22,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:24:22,814 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:24:22,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2022-02-15 04:24:22,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b008cc968/887ba97595444529872a94b8aad1aaff/FLAG129c00378 [2022-02-15 04:24:23,185 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:24:23,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c [2022-02-15 04:24:23,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b008cc968/887ba97595444529872a94b8aad1aaff/FLAG129c00378 [2022-02-15 04:24:23,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b008cc968/887ba97595444529872a94b8aad1aaff [2022-02-15 04:24:23,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:24:23,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:24:23,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:24:23,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:24:23,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:24:23,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cab427c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23, skipping insertion in model container [2022-02-15 04:24:23,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:24:23,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:24:23,820 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c[4591,4604] [2022-02-15 04:24:23,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:24:23,833 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:24:23,862 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c[4591,4604] [2022-02-15 04:24:23,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:24:23,870 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:24:23,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23 WrapperNode [2022-02-15 04:24:23,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:24:23,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:24:23,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:24:23,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:24:23,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:24:23,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:24:23,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:24:23,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:24:23,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23" (1/1) ... [2022-02-15 04:24:23,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:24:23,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:24:23,948 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 04:24:23,980 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 04:24:23,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:24:24,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:24:24,000 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:24:24,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:24:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:24:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:24:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:24:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:24:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 04:24:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:24:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:24:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:24:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:24:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:24:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:24:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:24:24,074 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:24:24,075 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:24:24,260 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:24:24,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:24:24,265 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 04:24:24,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:24:24 BoogieIcfgContainer [2022-02-15 04:24:24,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:24:24,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:24:24,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:24:24,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:24:24,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:24:23" (1/3) ... [2022-02-15 04:24:24,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22482f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:24:24, skipping insertion in model container [2022-02-15 04:24:24,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:23" (2/3) ... [2022-02-15 04:24:24,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22482f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:24:24, skipping insertion in model container [2022-02-15 04:24:24,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:24:24" (3/3) ... [2022-02-15 04:24:24,285 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2022-02-15 04:24:24,289 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:24:24,289 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:24:24,315 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:24:24,319 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-15 04:24:24,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:24:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 04:24:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 04:24:24,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:24,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:24,345 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash 88534809, now seen corresponding path program 1 times [2022-02-15 04:24:24,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:24,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791220921] [2022-02-15 04:24:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:24,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:24,400 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:24,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:24,571 INFO 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 04:24:24,572 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:24,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791220921] [2022-02-15 04:24:24,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791220921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:24,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:24,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:24,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235877498] [2022-02-15 04:24:24,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:24,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:24,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:24,598 INFO L87 Difference]: Start difference. First operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:24,787 INFO L93 Difference]: Finished difference Result 100 states and 175 transitions. [2022-02-15 04:24:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:24,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 04:24:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:24,795 INFO L225 Difference]: With dead ends: 100 [2022-02-15 04:24:24,796 INFO L226 Difference]: Without dead ends: 85 [2022-02-15 04:24:24,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:24,799 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 208 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:24,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 101 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:24,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-15 04:24:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2022-02-15 04:24:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2022-02-15 04:24:24,830 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 23 [2022-02-15 04:24:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:24,831 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2022-02-15 04:24:24,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2022-02-15 04:24:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 04:24:24,832 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:24,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:24,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:24:24,832 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:24,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1191328869, now seen corresponding path program 1 times [2022-02-15 04:24:24,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:24,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391718072] [2022-02-15 04:24:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:24,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:24,835 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:24,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:24,886 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:24,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391718072] [2022-02-15 04:24:24,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [391718072] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:24,886 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:24,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:24,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675258363] [2022-02-15 04:24:24,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:24,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:24,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:24,888 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:24,986 INFO L93 Difference]: Finished difference Result 138 states and 253 transitions. [2022-02-15 04:24:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 04:24:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:24,988 INFO L225 Difference]: With dead ends: 138 [2022-02-15 04:24:24,988 INFO L226 Difference]: Without dead ends: 85 [2022-02-15 04:24:24,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:24,989 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:24,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 111 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-15 04:24:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-02-15 04:24:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.860759493670886) internal successors, (147), 79 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 150 transitions. [2022-02-15 04:24:25,003 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 150 transitions. Word has length 23 [2022-02-15 04:24:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:25,003 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 150 transitions. [2022-02-15 04:24:25,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 150 transitions. [2022-02-15 04:24:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 04:24:25,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:25,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:25,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:24:25,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1550175482, now seen corresponding path program 1 times [2022-02-15 04:24:25,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:25,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143493400] [2022-02-15 04:24:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:25,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:25,007 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,042 INFO 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 04:24:25,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:25,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143493400] [2022-02-15 04:24:25,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [143493400] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:25,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:25,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:25,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140250198] [2022-02-15 04:24:25,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:25,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:25,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:25,044 INFO L87 Difference]: Start difference. First operand 83 states and 150 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:25,164 INFO L93 Difference]: Finished difference Result 127 states and 226 transitions. [2022-02-15 04:24:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:25,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:25,168 INFO L225 Difference]: With dead ends: 127 [2022-02-15 04:24:25,168 INFO L226 Difference]: Without dead ends: 88 [2022-02-15 04:24:25,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:25,171 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:25,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 133 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-15 04:24:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-02-15 04:24:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 82 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 152 transitions. [2022-02-15 04:24:25,192 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 152 transitions. Word has length 24 [2022-02-15 04:24:25,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:25,193 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 152 transitions. [2022-02-15 04:24:25,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 152 transitions. [2022-02-15 04:24:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 04:24:25,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:25,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:25,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 04:24:25,194 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1723723460, now seen corresponding path program 1 times [2022-02-15 04:24:25,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:25,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316201943] [2022-02-15 04:24:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:25,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:25,197 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:25,231 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:25,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316201943] [2022-02-15 04:24:25,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [316201943] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:25,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:25,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:25,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228719033] [2022-02-15 04:24:25,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:25,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:25,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:25,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:25,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:25,233 INFO L87 Difference]: Start difference. First operand 86 states and 152 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:25,348 INFO L93 Difference]: Finished difference Result 238 states and 432 transitions. [2022-02-15 04:24:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:25,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:25,353 INFO L225 Difference]: With dead ends: 238 [2022-02-15 04:24:25,353 INFO L226 Difference]: Without dead ends: 161 [2022-02-15 04:24:25,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:25,360 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 197 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:25,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 91 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-15 04:24:25,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-02-15 04:24:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8193548387096774) internal successors, (282), 155 states have internal predecessors, (282), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 285 transitions. [2022-02-15 04:24:25,390 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 285 transitions. Word has length 24 [2022-02-15 04:24:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:25,390 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 285 transitions. [2022-02-15 04:24:25,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 285 transitions. [2022-02-15 04:24:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 04:24:25,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:25,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:25,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 04:24:25,392 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1291380158, now seen corresponding path program 1 times [2022-02-15 04:24:25,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:25,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562462638] [2022-02-15 04:24:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:25,394 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,475 INFO 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 04:24:25,475 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:25,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562462638] [2022-02-15 04:24:25,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1562462638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:25,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:25,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:25,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955239117] [2022-02-15 04:24:25,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:25,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:25,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:25,477 INFO L87 Difference]: Start difference. First operand 159 states and 285 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:25,576 INFO L93 Difference]: Finished difference Result 207 states and 371 transitions. [2022-02-15 04:24:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:25,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:25,578 INFO L225 Difference]: With dead ends: 207 [2022-02-15 04:24:25,578 INFO L226 Difference]: Without dead ends: 205 [2022-02-15 04:24:25,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:25,582 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 128 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:25,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 152 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-15 04:24:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2022-02-15 04:24:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8064516129032258) internal successors, (280), 155 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 283 transitions. [2022-02-15 04:24:25,604 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 283 transitions. Word has length 24 [2022-02-15 04:24:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:25,604 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 283 transitions. [2022-02-15 04:24:25,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 283 transitions. [2022-02-15 04:24:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 04:24:25,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:25,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:25,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 04:24:25,613 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:25,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1896032784, now seen corresponding path program 1 times [2022-02-15 04:24:25,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:25,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431971523] [2022-02-15 04:24:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:25,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:25,615 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,672 INFO 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 04:24:25,672 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:25,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431971523] [2022-02-15 04:24:25,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1431971523] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:25,672 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:25,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:25,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614281093] [2022-02-15 04:24:25,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:25,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:25,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:25,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:25,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:25,673 INFO L87 Difference]: Start difference. First operand 159 states and 283 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:25,788 INFO L93 Difference]: Finished difference Result 299 states and 539 transitions. [2022-02-15 04:24:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:25,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 04:24:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:25,790 INFO L225 Difference]: With dead ends: 299 [2022-02-15 04:24:25,790 INFO L226 Difference]: Without dead ends: 297 [2022-02-15 04:24:25,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:25,791 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:25,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-15 04:24:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 215. [2022-02-15 04:24:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.7914691943127963) internal successors, (378), 211 states have internal predecessors, (378), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 381 transitions. [2022-02-15 04:24:25,816 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 381 transitions. Word has length 25 [2022-02-15 04:24:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:25,817 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 381 transitions. [2022-02-15 04:24:25,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 381 transitions. [2022-02-15 04:24:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 04:24:25,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:25,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:25,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 04:24:25,819 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 616169106, now seen corresponding path program 1 times [2022-02-15 04:24:25,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:25,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218413235] [2022-02-15 04:24:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:25,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:25,822 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:25,873 INFO 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 04:24:25,873 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:25,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218413235] [2022-02-15 04:24:25,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [218413235] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:25,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:25,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:25,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684886527] [2022-02-15 04:24:25,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:25,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:25,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:25,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:25,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:25,874 INFO L87 Difference]: Start difference. First operand 215 states and 381 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:25,984 INFO L93 Difference]: Finished difference Result 511 states and 915 transitions. [2022-02-15 04:24:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 04:24:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:25,987 INFO L225 Difference]: With dead ends: 511 [2022-02-15 04:24:25,987 INFO L226 Difference]: Without dead ends: 305 [2022-02-15 04:24:25,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:25,990 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:25,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 115 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-15 04:24:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 303. [2022-02-15 04:24:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 299 states have (on average 1.7792642140468227) internal successors, (532), 299 states have internal predecessors, (532), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 535 transitions. [2022-02-15 04:24:26,009 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 535 transitions. Word has length 25 [2022-02-15 04:24:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:26,010 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 535 transitions. [2022-02-15 04:24:26,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 535 transitions. [2022-02-15 04:24:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:24:26,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:26,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:26,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 04:24:26,013 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:26,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1352312423, now seen corresponding path program 1 times [2022-02-15 04:24:26,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:26,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101884717] [2022-02-15 04:24:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:26,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:26,017 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:26,067 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:26,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101884717] [2022-02-15 04:24:26,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2101884717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:26,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:26,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:26,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280160007] [2022-02-15 04:24:26,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:26,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:26,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:26,068 INFO L87 Difference]: Start difference. First operand 303 states and 535 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:26,151 INFO L93 Difference]: Finished difference Result 457 states and 805 transitions. [2022-02-15 04:24:26,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:26,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:26,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:26,155 INFO L225 Difference]: With dead ends: 457 [2022-02-15 04:24:26,155 INFO L226 Difference]: Without dead ends: 311 [2022-02-15 04:24:26,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:26,157 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 155 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:26,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 127 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-15 04:24:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-02-15 04:24:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.7573770491803278) internal successors, (536), 305 states have internal predecessors, (536), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 539 transitions. [2022-02-15 04:24:26,176 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 539 transitions. Word has length 26 [2022-02-15 04:24:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:26,177 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 539 transitions. [2022-02-15 04:24:26,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 539 transitions. [2022-02-15 04:24:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:24:26,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:26,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:26,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 04:24:26,178 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1921586519, now seen corresponding path program 1 times [2022-02-15 04:24:26,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:26,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762892436] [2022-02-15 04:24:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:26,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:26,182 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,220 INFO 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 04:24:26,221 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:26,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762892436] [2022-02-15 04:24:26,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [762892436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:26,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:26,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:26,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743428187] [2022-02-15 04:24:26,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:26,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:26,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:26,222 INFO L87 Difference]: Start difference. First operand 309 states and 539 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:26,332 INFO L93 Difference]: Finished difference Result 573 states and 1013 transitions. [2022-02-15 04:24:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:26,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:26,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:26,334 INFO L225 Difference]: With dead ends: 573 [2022-02-15 04:24:26,334 INFO L226 Difference]: Without dead ends: 571 [2022-02-15 04:24:26,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:26,335 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:26,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-02-15 04:24:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 425. [2022-02-15 04:24:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.7292161520190024) internal successors, (728), 421 states have internal predecessors, (728), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 731 transitions. [2022-02-15 04:24:26,358 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 731 transitions. Word has length 26 [2022-02-15 04:24:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:26,358 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 731 transitions. [2022-02-15 04:24:26,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 731 transitions. [2022-02-15 04:24:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:24:26,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:26,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:26,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 04:24:26,359 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash 641722841, now seen corresponding path program 1 times [2022-02-15 04:24:26,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:26,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558693680] [2022-02-15 04:24:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:26,361 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,379 INFO 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 04:24:26,380 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:26,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558693680] [2022-02-15 04:24:26,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [558693680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:26,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:26,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:26,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295561368] [2022-02-15 04:24:26,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:26,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:26,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:26,381 INFO L87 Difference]: Start difference. First operand 425 states and 731 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:26,471 INFO L93 Difference]: Finished difference Result 1005 states and 1741 transitions. [2022-02-15 04:24:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:26,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:26,474 INFO L225 Difference]: With dead ends: 1005 [2022-02-15 04:24:26,474 INFO L226 Difference]: Without dead ends: 595 [2022-02-15 04:24:26,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:26,475 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:26,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-15 04:24:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2022-02-15 04:24:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 589 states have (on average 1.7181663837011885) internal successors, (1012), 589 states have internal predecessors, (1012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1015 transitions. [2022-02-15 04:24:26,509 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1015 transitions. Word has length 26 [2022-02-15 04:24:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:26,509 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1015 transitions. [2022-02-15 04:24:26,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1015 transitions. [2022-02-15 04:24:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:24:26,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:26,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:26,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 04:24:26,510 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -560146297, now seen corresponding path program 1 times [2022-02-15 04:24:26,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:26,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808526788] [2022-02-15 04:24:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:26,512 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,531 INFO 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 04:24:26,531 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:26,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808526788] [2022-02-15 04:24:26,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1808526788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:26,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:26,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:26,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087029400] [2022-02-15 04:24:26,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:26,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:26,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:26,532 INFO L87 Difference]: Start difference. First operand 593 states and 1015 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:26,638 INFO L93 Difference]: Finished difference Result 889 states and 1517 transitions. [2022-02-15 04:24:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:26,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 04:24:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:26,640 INFO L225 Difference]: With dead ends: 889 [2022-02-15 04:24:26,640 INFO L226 Difference]: Without dead ends: 603 [2022-02-15 04:24:26,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:26,641 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:26,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 124 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-15 04:24:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2022-02-15 04:24:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.695142378559464) internal successors, (1012), 597 states have internal predecessors, (1012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1015 transitions. [2022-02-15 04:24:26,672 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1015 transitions. Word has length 27 [2022-02-15 04:24:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:26,673 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1015 transitions. [2022-02-15 04:24:26,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1015 transitions. [2022-02-15 04:24:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:24:26,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:26,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:26,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 04:24:26,674 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:26,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:26,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1581214651, now seen corresponding path program 1 times [2022-02-15 04:24:26,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:26,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133114469] [2022-02-15 04:24:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:26,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:26,675 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:26,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:26,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133114469] [2022-02-15 04:24:26,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [133114469] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:26,694 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:26,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:26,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931087891] [2022-02-15 04:24:26,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:26,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:26,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:26,695 INFO L87 Difference]: Start difference. First operand 601 states and 1015 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:26,810 INFO L93 Difference]: Finished difference Result 1101 states and 1889 transitions. [2022-02-15 04:24:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 04:24:26,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:26,814 INFO L225 Difference]: With dead ends: 1101 [2022-02-15 04:24:26,814 INFO L226 Difference]: Without dead ends: 1099 [2022-02-15 04:24:26,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:26,815 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:26,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 86 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-02-15 04:24:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 841. [2022-02-15 04:24:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 837 states have (on average 1.6583034647550776) internal successors, (1388), 837 states have internal predecessors, (1388), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1391 transitions. [2022-02-15 04:24:26,892 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1391 transitions. Word has length 27 [2022-02-15 04:24:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:26,892 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1391 transitions. [2022-02-15 04:24:26,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1391 transitions. [2022-02-15 04:24:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:24:26,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:26,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:26,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 04:24:26,894 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:26,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1433888967, now seen corresponding path program 1 times [2022-02-15 04:24:26,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:26,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533530297] [2022-02-15 04:24:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:26,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:26,896 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:26,915 INFO 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 04:24:26,915 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:26,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533530297] [2022-02-15 04:24:26,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [533530297] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:26,915 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:26,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:26,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076988972] [2022-02-15 04:24:26,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:26,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:26,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:26,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:26,916 INFO L87 Difference]: Start difference. First operand 841 states and 1391 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:27,044 INFO L93 Difference]: Finished difference Result 1981 states and 3297 transitions. [2022-02-15 04:24:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 04:24:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:27,049 INFO L225 Difference]: With dead ends: 1981 [2022-02-15 04:24:27,049 INFO L226 Difference]: Without dead ends: 1163 [2022-02-15 04:24:27,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:27,050 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:27,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-02-15 04:24:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1161. [2022-02-15 04:24:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1157 states have (on average 1.6490924805531546) internal successors, (1908), 1157 states have internal predecessors, (1908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1911 transitions. [2022-02-15 04:24:27,141 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1911 transitions. Word has length 27 [2022-02-15 04:24:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:27,141 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1911 transitions. [2022-02-15 04:24:27,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1911 transitions. [2022-02-15 04:24:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:24:27,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:27,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:27,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 04:24:27,143 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1772799826, now seen corresponding path program 1 times [2022-02-15 04:24:27,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:27,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315399966] [2022-02-15 04:24:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:27,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:27,145 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:27,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:27,163 INFO 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 04:24:27,163 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:27,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315399966] [2022-02-15 04:24:27,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1315399966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:27,163 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:27,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:27,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952859284] [2022-02-15 04:24:27,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:27,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:27,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:27,164 INFO L87 Difference]: Start difference. First operand 1161 states and 1911 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:27,286 INFO L93 Difference]: Finished difference Result 1741 states and 2857 transitions. [2022-02-15 04:24:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:27,290 INFO L225 Difference]: With dead ends: 1741 [2022-02-15 04:24:27,290 INFO L226 Difference]: Without dead ends: 1179 [2022-02-15 04:24:27,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:27,291 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:27,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 121 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:24:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-02-15 04:24:27,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1177. [2022-02-15 04:24:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1173 states have (on average 1.6265984654731458) internal successors, (1908), 1173 states have internal predecessors, (1908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1911 transitions. [2022-02-15 04:24:27,383 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1911 transitions. Word has length 28 [2022-02-15 04:24:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:27,383 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1911 transitions. [2022-02-15 04:24:27,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1911 transitions. [2022-02-15 04:24:27,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:24:27,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:27,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:27,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 04:24:27,384 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:27,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1501099116, now seen corresponding path program 1 times [2022-02-15 04:24:27,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:27,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023322836] [2022-02-15 04:24:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:27,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:27,386 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:27,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:27,403 INFO 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 04:24:27,403 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:27,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023322836] [2022-02-15 04:24:27,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023322836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:27,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:27,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:27,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501369717] [2022-02-15 04:24:27,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:27,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:27,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:27,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:27,404 INFO L87 Difference]: Start difference. First operand 1177 states and 1911 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:27,589 INFO L93 Difference]: Finished difference Result 2125 states and 3513 transitions. [2022-02-15 04:24:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:27,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:27,595 INFO L225 Difference]: With dead ends: 2125 [2022-02-15 04:24:27,595 INFO L226 Difference]: Without dead ends: 2123 [2022-02-15 04:24:27,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:27,596 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:27,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:24:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-02-15 04:24:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1673. [2022-02-15 04:24:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1669 states have (on average 1.5841821449970042) internal successors, (2644), 1669 states have internal predecessors, (2644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2647 transitions. [2022-02-15 04:24:27,693 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2647 transitions. Word has length 28 [2022-02-15 04:24:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:27,693 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2647 transitions. [2022-02-15 04:24:27,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2647 transitions. [2022-02-15 04:24:27,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:24:27,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:27,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:27,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 04:24:27,695 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash 221235438, now seen corresponding path program 1 times [2022-02-15 04:24:27,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:27,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446533327] [2022-02-15 04:24:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:27,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:27,696 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:27,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:27,730 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:27,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446533327] [2022-02-15 04:24:27,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [446533327] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:27,731 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:27,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:27,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141155639] [2022-02-15 04:24:27,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:27,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:27,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:27,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:27,731 INFO L87 Difference]: Start difference. First operand 1673 states and 2647 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:27,974 INFO L93 Difference]: Finished difference Result 3917 states and 6233 transitions. [2022-02-15 04:24:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:27,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:27,980 INFO L225 Difference]: With dead ends: 3917 [2022-02-15 04:24:27,980 INFO L226 Difference]: Without dead ends: 2283 [2022-02-15 04:24:27,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:27,983 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:27,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 121 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-02-15 04:24:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2281. [2022-02-15 04:24:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2277 states have (on average 1.5757575757575757) internal successors, (3588), 2277 states have internal predecessors, (3588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3591 transitions. [2022-02-15 04:24:28,138 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3591 transitions. Word has length 28 [2022-02-15 04:24:28,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:28,138 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 3591 transitions. [2022-02-15 04:24:28,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3591 transitions. [2022-02-15 04:24:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:24:28,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:28,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:28,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 04:24:28,141 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash -710353220, now seen corresponding path program 1 times [2022-02-15 04:24:28,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:28,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541897895] [2022-02-15 04:24:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:28,142 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:28,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:28,162 INFO 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 04:24:28,162 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:28,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541897895] [2022-02-15 04:24:28,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541897895] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:28,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:28,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:28,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398533023] [2022-02-15 04:24:28,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:28,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:28,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:28,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:28,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:28,163 INFO L87 Difference]: Start difference. First operand 2281 states and 3591 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:28,366 INFO L93 Difference]: Finished difference Result 3421 states and 5369 transitions. [2022-02-15 04:24:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 04:24:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:28,372 INFO L225 Difference]: With dead ends: 3421 [2022-02-15 04:24:28,372 INFO L226 Difference]: Without dead ends: 2315 [2022-02-15 04:24:28,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:28,374 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:28,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 118 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:24:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-02-15 04:24:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2022-02-15 04:24:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2309 states have (on average 1.5539194456474665) internal successors, (3588), 2309 states have internal predecessors, (3588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3591 transitions. [2022-02-15 04:24:28,516 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3591 transitions. Word has length 29 [2022-02-15 04:24:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:28,516 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3591 transitions. [2022-02-15 04:24:28,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3591 transitions. [2022-02-15 04:24:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:24:28,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:28,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:28,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 04:24:28,518 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1731421574, now seen corresponding path program 1 times [2022-02-15 04:24:28,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:28,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594987812] [2022-02-15 04:24:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:28,520 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:28,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:28,537 INFO 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 04:24:28,537 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:28,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594987812] [2022-02-15 04:24:28,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1594987812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:28,537 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:28,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:28,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324168392] [2022-02-15 04:24:28,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:28,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:28,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:28,538 INFO L87 Difference]: Start difference. First operand 2313 states and 3591 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:28,864 INFO L93 Difference]: Finished difference Result 4109 states and 6505 transitions. [2022-02-15 04:24:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 04:24:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:28,874 INFO L225 Difference]: With dead ends: 4109 [2022-02-15 04:24:28,874 INFO L226 Difference]: Without dead ends: 4107 [2022-02-15 04:24:28,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:28,875 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:28,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-02-15 04:24:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3337. [2022-02-15 04:24:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.5085508550855085) internal successors, (5028), 3333 states have internal predecessors, (5028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 5031 transitions. [2022-02-15 04:24:29,125 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 5031 transitions. Word has length 29 [2022-02-15 04:24:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:29,125 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 5031 transitions. [2022-02-15 04:24:29,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 5031 transitions. [2022-02-15 04:24:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:24:29,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:29,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:29,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 04:24:29,128 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:29,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1283682044, now seen corresponding path program 1 times [2022-02-15 04:24:29,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:29,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019693532] [2022-02-15 04:24:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:29,130 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:29,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:29,145 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 04:24:29,145 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:29,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019693532] [2022-02-15 04:24:29,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019693532] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:29,146 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:29,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:29,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731112585] [2022-02-15 04:24:29,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:29,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:29,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:29,146 INFO L87 Difference]: Start difference. First operand 3337 states and 5031 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:29,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:29,491 INFO L93 Difference]: Finished difference Result 7757 states and 11753 transitions. [2022-02-15 04:24:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:29,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 04:24:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:29,502 INFO L225 Difference]: With dead ends: 7757 [2022-02-15 04:24:29,502 INFO L226 Difference]: Without dead ends: 4491 [2022-02-15 04:24:29,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:29,508 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:29,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 123 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:24:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-02-15 04:24:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4489. [2022-02-15 04:24:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4485 states have (on average 1.4992196209587514) internal successors, (6724), 4485 states have internal predecessors, (6724), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6727 transitions. [2022-02-15 04:24:29,829 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6727 transitions. Word has length 29 [2022-02-15 04:24:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:29,829 INFO L470 AbstractCegarLoop]: Abstraction has 4489 states and 6727 transitions. [2022-02-15 04:24:29,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6727 transitions. [2022-02-15 04:24:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:24:29,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:29,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:29,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 04:24:29,833 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2134246461, now seen corresponding path program 1 times [2022-02-15 04:24:29,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:29,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670785006] [2022-02-15 04:24:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:29,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:29,835 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:29,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:29,853 INFO 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 04:24:29,853 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:29,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670785006] [2022-02-15 04:24:29,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670785006] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:29,853 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:29,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:29,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124124755] [2022-02-15 04:24:29,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:29,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:29,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:29,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:29,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:29,854 INFO L87 Difference]: Start difference. First operand 4489 states and 6727 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:30,257 INFO L93 Difference]: Finished difference Result 6733 states and 10057 transitions. [2022-02-15 04:24:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:30,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:30,268 INFO L225 Difference]: With dead ends: 6733 [2022-02-15 04:24:30,268 INFO L226 Difference]: Without dead ends: 4555 [2022-02-15 04:24:30,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:30,272 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:30,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 115 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:30,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2022-02-15 04:24:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4553. [2022-02-15 04:24:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4549 states have (on average 1.478127060892504) internal successors, (6724), 4549 states have internal predecessors, (6724), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6727 transitions. [2022-02-15 04:24:30,664 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6727 transitions. Word has length 30 [2022-02-15 04:24:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:30,664 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 6727 transitions. [2022-02-15 04:24:30,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6727 transitions. [2022-02-15 04:24:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:24:30,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:30,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:30,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 04:24:30,669 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1139652481, now seen corresponding path program 1 times [2022-02-15 04:24:30,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:30,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196666206] [2022-02-15 04:24:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:30,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:30,670 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:30,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:30,687 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:30,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196666206] [2022-02-15 04:24:30,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [196666206] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:30,687 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:30,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:30,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289613968] [2022-02-15 04:24:30,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:30,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:30,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:30,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:30,688 INFO L87 Difference]: Start difference. First operand 4553 states and 6727 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:31,278 INFO L93 Difference]: Finished difference Result 7949 states and 11977 transitions. [2022-02-15 04:24:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:31,292 INFO L225 Difference]: With dead ends: 7949 [2022-02-15 04:24:31,292 INFO L226 Difference]: Without dead ends: 7947 [2022-02-15 04:24:31,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:31,295 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:31,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:31,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-02-15 04:24:31,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6665. [2022-02-15 04:24:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.4322173847770605) internal successors, (9540), 6661 states have internal predecessors, (9540), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 9543 transitions. [2022-02-15 04:24:31,777 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 9543 transitions. Word has length 30 [2022-02-15 04:24:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:31,777 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 9543 transitions. [2022-02-15 04:24:31,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 9543 transitions. [2022-02-15 04:24:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:24:31,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:31,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:31,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 04:24:31,783 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:31,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash -140211197, now seen corresponding path program 1 times [2022-02-15 04:24:31,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:31,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044085428] [2022-02-15 04:24:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:31,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:31,785 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:31,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:31,800 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:31,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044085428] [2022-02-15 04:24:31,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044085428] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:31,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:31,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:31,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272141481] [2022-02-15 04:24:31,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:31,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:31,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:31,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:31,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:31,801 INFO L87 Difference]: Start difference. First operand 6665 states and 9543 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:32,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:32,547 INFO L93 Difference]: Finished difference Result 15373 states and 22089 transitions. [2022-02-15 04:24:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:32,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:32,586 INFO L225 Difference]: With dead ends: 15373 [2022-02-15 04:24:32,586 INFO L226 Difference]: Without dead ends: 8843 [2022-02-15 04:24:32,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:32,597 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:32,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 125 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:24:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2022-02-15 04:24:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8841. [2022-02-15 04:24:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8837 states have (on average 1.419938893289578) internal successors, (12548), 8837 states have internal predecessors, (12548), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12551 transitions. [2022-02-15 04:24:33,375 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12551 transitions. Word has length 30 [2022-02-15 04:24:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:33,376 INFO L470 AbstractCegarLoop]: Abstraction has 8841 states and 12551 transitions. [2022-02-15 04:24:33,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12551 transitions. [2022-02-15 04:24:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:24:33,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:33,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:33,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 04:24:33,382 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash 969703665, now seen corresponding path program 1 times [2022-02-15 04:24:33,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:33,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105912089] [2022-02-15 04:24:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:33,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:33,384 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:33,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:33,407 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:33,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105912089] [2022-02-15 04:24:33,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [105912089] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:33,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:33,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:33,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818180976] [2022-02-15 04:24:33,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:33,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:33,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:33,408 INFO L87 Difference]: Start difference. First operand 8841 states and 12551 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:34,117 INFO L93 Difference]: Finished difference Result 13261 states and 18761 transitions. [2022-02-15 04:24:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 04:24:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:34,131 INFO L225 Difference]: With dead ends: 13261 [2022-02-15 04:24:34,132 INFO L226 Difference]: Without dead ends: 8971 [2022-02-15 04:24:34,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:34,140 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:34,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 112 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-02-15 04:24:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8969. [2022-02-15 04:24:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8965 states have (on average 1.399665365309537) internal successors, (12548), 8965 states have internal predecessors, (12548), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 12551 transitions. [2022-02-15 04:24:34,839 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 12551 transitions. Word has length 31 [2022-02-15 04:24:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:34,839 INFO L470 AbstractCegarLoop]: Abstraction has 8969 states and 12551 transitions. [2022-02-15 04:24:34,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 12551 transitions. [2022-02-15 04:24:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:24:34,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:34,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:34,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 04:24:34,845 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash -51364689, now seen corresponding path program 1 times [2022-02-15 04:24:34,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:34,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427523071] [2022-02-15 04:24:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:34,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:34,847 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:34,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:34,879 INFO 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 04:24:34,880 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:34,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427523071] [2022-02-15 04:24:34,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [427523071] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:34,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:34,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:34,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577304771] [2022-02-15 04:24:34,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:34,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:34,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:34,881 INFO L87 Difference]: Start difference. First operand 8969 states and 12551 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:36,170 INFO L93 Difference]: Finished difference Result 15373 states and 21897 transitions. [2022-02-15 04:24:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 04:24:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:36,197 INFO L225 Difference]: With dead ends: 15373 [2022-02-15 04:24:36,198 INFO L226 Difference]: Without dead ends: 15371 [2022-02-15 04:24:36,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:36,202 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:36,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:24:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2022-02-15 04:24:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13321. [2022-02-15 04:24:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13321 states, 13317 states have (on average 1.355560561688068) internal successors, (18052), 13317 states have internal predecessors, (18052), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13321 states to 13321 states and 18055 transitions. [2022-02-15 04:24:37,493 INFO L78 Accepts]: Start accepts. Automaton has 13321 states and 18055 transitions. Word has length 31 [2022-02-15 04:24:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:37,493 INFO L470 AbstractCegarLoop]: Abstraction has 13321 states and 18055 transitions. [2022-02-15 04:24:37,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 13321 states and 18055 transitions. [2022-02-15 04:24:37,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:24:37,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:37,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:37,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 04:24:37,503 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:37,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1331228367, now seen corresponding path program 1 times [2022-02-15 04:24:37,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:37,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714306498] [2022-02-15 04:24:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:37,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:37,505 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,522 INFO 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 04:24:37,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:37,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714306498] [2022-02-15 04:24:37,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [714306498] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:37,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:37,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:37,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081826445] [2022-02-15 04:24:37,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:37,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:37,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:37,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:37,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:37,523 INFO L87 Difference]: Start difference. First operand 13321 states and 18055 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:38,931 INFO L93 Difference]: Finished difference Result 30477 states and 41353 transitions. [2022-02-15 04:24:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 04:24:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:38,957 INFO L225 Difference]: With dead ends: 30477 [2022-02-15 04:24:38,957 INFO L226 Difference]: Without dead ends: 17419 [2022-02-15 04:24:38,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:38,987 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:38,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 127 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2022-02-15 04:24:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17417. [2022-02-15 04:24:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17417 states, 17413 states have (on average 1.3380807442715212) internal successors, (23300), 17413 states have internal predecessors, (23300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17417 states to 17417 states and 23303 transitions. [2022-02-15 04:24:40,399 INFO L78 Accepts]: Start accepts. Automaton has 17417 states and 23303 transitions. Word has length 31 [2022-02-15 04:24:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:40,400 INFO L470 AbstractCegarLoop]: Abstraction has 17417 states and 23303 transitions. [2022-02-15 04:24:40,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 17417 states and 23303 transitions. [2022-02-15 04:24:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:24:40,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:40,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:40,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 04:24:40,411 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1592089896, now seen corresponding path program 1 times [2022-02-15 04:24:40,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:40,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36137548] [2022-02-15 04:24:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:40,412 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:40,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:40,428 INFO 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 04:24:40,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:40,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36137548] [2022-02-15 04:24:40,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [36137548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:40,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:40,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:40,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742975298] [2022-02-15 04:24:40,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:40,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:40,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:40,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:40,429 INFO L87 Difference]: Start difference. First operand 17417 states and 23303 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:42,059 INFO L93 Difference]: Finished difference Result 26125 states and 34825 transitions. [2022-02-15 04:24:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:42,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:42,083 INFO L225 Difference]: With dead ends: 26125 [2022-02-15 04:24:42,084 INFO L226 Difference]: Without dead ends: 17675 [2022-02-15 04:24:42,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:42,103 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 149 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:42,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:24:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2022-02-15 04:24:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17673. [2022-02-15 04:24:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17673 states, 17669 states have (on average 1.3186937574282642) internal successors, (23300), 17669 states have internal predecessors, (23300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17673 states to 17673 states and 23303 transitions. [2022-02-15 04:24:43,603 INFO L78 Accepts]: Start accepts. Automaton has 17673 states and 23303 transitions. Word has length 32 [2022-02-15 04:24:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:43,603 INFO L470 AbstractCegarLoop]: Abstraction has 17673 states and 23303 transitions. [2022-02-15 04:24:43,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 17673 states and 23303 transitions. [2022-02-15 04:24:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:24:43,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:43,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:43,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 04:24:43,615 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1681809046, now seen corresponding path program 1 times [2022-02-15 04:24:43,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:43,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055665623] [2022-02-15 04:24:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:43,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:43,616 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:43,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:43,631 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 04:24:43,631 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:43,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055665623] [2022-02-15 04:24:43,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2055665623] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:43,631 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:43,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:43,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260373408] [2022-02-15 04:24:43,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:43,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:43,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:43,632 INFO L87 Difference]: Start difference. First operand 17673 states and 23303 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:46,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:46,407 INFO L93 Difference]: Finished difference Result 51469 states and 66825 transitions. [2022-02-15 04:24:46,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:46,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:46,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:46,458 INFO L225 Difference]: With dead ends: 51469 [2022-02-15 04:24:46,458 INFO L226 Difference]: Without dead ends: 34315 [2022-02-15 04:24:46,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:46,491 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:46,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 99 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:24:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2022-02-15 04:24:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34313. [2022-02-15 04:24:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2685884170334314) internal successors, (43524), 34309 states have internal predecessors, (43524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 43527 transitions. [2022-02-15 04:24:49,590 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 43527 transitions. Word has length 32 [2022-02-15 04:24:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:49,590 INFO L470 AbstractCegarLoop]: Abstraction has 34313 states and 43527 transitions. [2022-02-15 04:24:49,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 43527 transitions. [2022-02-15 04:24:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:24:49,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:49,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:49,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 04:24:49,611 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1333294572, now seen corresponding path program 1 times [2022-02-15 04:24:49,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:49,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860483359] [2022-02-15 04:24:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:49,612 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:49,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:49,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:49,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860483359] [2022-02-15 04:24:49,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1860483359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:49,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:49,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:49,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402047802] [2022-02-15 04:24:49,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:49,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:49,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:49,628 INFO L87 Difference]: Start difference. First operand 34313 states and 43527 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:52,903 INFO L93 Difference]: Finished difference Result 37389 states and 48649 transitions. [2022-02-15 04:24:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:52,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:24:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:52,963 INFO L225 Difference]: With dead ends: 37389 [2022-02-15 04:24:52,964 INFO L226 Difference]: Without dead ends: 37387 [2022-02-15 04:24:52,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:24:52,978 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 96 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:52,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 120 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2022-02-15 04:24:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 34313. [2022-02-15 04:24:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2536652190387363) internal successors, (43012), 34309 states have internal predecessors, (43012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 43015 transitions. [2022-02-15 04:24:56,033 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 43015 transitions. Word has length 32 [2022-02-15 04:24:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:56,033 INFO L470 AbstractCegarLoop]: Abstraction has 34313 states and 43015 transitions. [2022-02-15 04:24:56,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 43015 transitions. [2022-02-15 04:24:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:24:56,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:56,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:56,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 04:24:56,053 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash 596688678, now seen corresponding path program 1 times [2022-02-15 04:24:56,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:56,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110439854] [2022-02-15 04:24:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:56,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:56,057 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:56,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:56,088 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:56,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110439854] [2022-02-15 04:24:56,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110439854] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:56,088 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:56,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:56,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470453833] [2022-02-15 04:24:56,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:56,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:56,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:56,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:56,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:56,089 INFO L87 Difference]: Start difference. First operand 34313 states and 43015 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:01,343 INFO L93 Difference]: Finished difference Result 56845 states and 71689 transitions. [2022-02-15 04:25:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:01,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 04:25:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:01,437 INFO L225 Difference]: With dead ends: 56845 [2022-02-15 04:25:01,437 INFO L226 Difference]: Without dead ends: 56843 [2022-02-15 04:25:01,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:25:01,457 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:01,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:25:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56843 states. [2022-02-15 04:25:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56843 to 52745. [2022-02-15 04:25:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52745 states, 52741 states have (on average 1.2232608407121595) internal successors, (64516), 52741 states have internal predecessors, (64516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52745 states to 52745 states and 64519 transitions. [2022-02-15 04:25:06,610 INFO L78 Accepts]: Start accepts. Automaton has 52745 states and 64519 transitions. Word has length 33 [2022-02-15 04:25:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:06,610 INFO L470 AbstractCegarLoop]: Abstraction has 52745 states and 64519 transitions. [2022-02-15 04:25:06,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 52745 states and 64519 transitions. [2022-02-15 04:25:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:25:06,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:06,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:06,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 04:25:06,668 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:06,669 INFO L85 PathProgramCache]: Analyzing trace with hash -683175000, now seen corresponding path program 1 times [2022-02-15 04:25:06,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:06,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353867592] [2022-02-15 04:25:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:06,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:06,670 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:06,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:06,685 INFO 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 04:25:06,685 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:06,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353867592] [2022-02-15 04:25:06,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1353867592] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:06,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:06,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:06,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142488919] [2022-02-15 04:25:06,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:06,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:06,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:06,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:06,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:06,686 INFO L87 Difference]: Start difference. First operand 52745 states and 64519 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:13,068 INFO L93 Difference]: Finished difference Result 119309 states and 145417 transitions. [2022-02-15 04:25:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:13,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 04:25:13,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:13,178 INFO L225 Difference]: With dead ends: 119309 [2022-02-15 04:25:13,179 INFO L226 Difference]: Without dead ends: 67083 [2022-02-15 04:25:13,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:25:13,241 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:13,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:25:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67083 states. [2022-02-15 04:25:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67083 to 67081. [2022-02-15 04:25:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67081 states, 67077 states have (on average 1.1908105609970632) internal successors, (79876), 67077 states have internal predecessors, (79876), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67081 states to 67081 states and 79879 transitions. [2022-02-15 04:25:19,521 INFO L78 Accepts]: Start accepts. Automaton has 67081 states and 79879 transitions. Word has length 33 [2022-02-15 04:25:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:19,521 INFO L470 AbstractCegarLoop]: Abstraction has 67081 states and 79879 transitions. [2022-02-15 04:25:19,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 67081 states and 79879 transitions. [2022-02-15 04:25:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:25:19,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:19,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:19,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 04:25:19,708 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1317695979, now seen corresponding path program 1 times [2022-02-15 04:25:19,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:19,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005854296] [2022-02-15 04:25:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:19,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:19,721 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:19,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:19,766 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:19,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005854296] [2022-02-15 04:25:19,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1005854296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:19,766 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:19,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:19,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586308680] [2022-02-15 04:25:19,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:19,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:19,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:19,767 INFO L87 Difference]: Start difference. First operand 67081 states and 79879 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:26,002 INFO L93 Difference]: Finished difference Result 101389 states and 120841 transitions. [2022-02-15 04:25:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:26,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:25:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:26,127 INFO L225 Difference]: With dead ends: 101389 [2022-02-15 04:25:26,127 INFO L226 Difference]: Without dead ends: 68619 [2022-02-15 04:25:26,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:25:26,182 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:26,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 103 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:25:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2022-02-15 04:25:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68617. [2022-02-15 04:25:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68617 states, 68613 states have (on average 1.1790768513255505) internal successors, (80900), 68613 states have internal predecessors, (80900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68617 states to 68617 states and 80903 transitions. [2022-02-15 04:25:32,671 INFO L78 Accepts]: Start accepts. Automaton has 68617 states and 80903 transitions. Word has length 34 [2022-02-15 04:25:32,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:32,671 INFO L470 AbstractCegarLoop]: Abstraction has 68617 states and 80903 transitions. [2022-02-15 04:25:32,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 68617 states and 80903 transitions. [2022-02-15 04:25:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:25:32,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:32,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:32,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 04:25:32,711 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash 296627625, now seen corresponding path program 1 times [2022-02-15 04:25:32,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:32,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168845018] [2022-02-15 04:25:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:32,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:32,713 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:32,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:32,732 INFO 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 04:25:32,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:32,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168845018] [2022-02-15 04:25:32,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [168845018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:32,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:32,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:32,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541422595] [2022-02-15 04:25:32,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:32,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:32,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:32,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:32,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:32,733 INFO L87 Difference]: Start difference. First operand 68617 states and 80903 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:43,711 INFO L93 Difference]: Finished difference Result 110603 states and 129032 transitions. [2022-02-15 04:25:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:25:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:43,922 INFO L225 Difference]: With dead ends: 110603 [2022-02-15 04:25:43,922 INFO L226 Difference]: Without dead ends: 110601 [2022-02-15 04:25:43,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:25:43,954 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:43,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 78 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 04:25:44,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110601 states. [2022-02-15 04:25:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110601 to 106505. [2022-02-15 04:25:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106505 states, 106501 states have (on average 1.1538295415066526) internal successors, (122884), 106501 states have internal predecessors, (122884), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106505 states to 106505 states and 122887 transitions. [2022-02-15 04:25:55,306 INFO L78 Accepts]: Start accepts. Automaton has 106505 states and 122887 transitions. Word has length 34 [2022-02-15 04:25:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:55,307 INFO L470 AbstractCegarLoop]: Abstraction has 106505 states and 122887 transitions. [2022-02-15 04:25:55,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 106505 states and 122887 transitions. [2022-02-15 04:25:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:25:55,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:55,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:55,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 04:25:55,414 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:55,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:55,414 INFO L85 PathProgramCache]: Analyzing trace with hash -983236053, now seen corresponding path program 1 times [2022-02-15 04:25:55,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:55,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101432912] [2022-02-15 04:25:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:55,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:55,424 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:55,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:55,470 INFO 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 04:25:55,471 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:55,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101432912] [2022-02-15 04:25:55,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [101432912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:55,471 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:55,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:55,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613196738] [2022-02-15 04:25:55,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:55,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:55,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:55,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:55,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:55,472 INFO L87 Difference]: Start difference. First operand 106505 states and 122887 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:08,443 INFO L93 Difference]: Finished difference Result 237577 states and 270343 transitions. [2022-02-15 04:26:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:08,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 04:26:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:08,444 INFO L225 Difference]: With dead ends: 237577 [2022-02-15 04:26:08,444 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 04:26:08,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 04:26:08,830 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:08,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 04:26:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 04:26:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 04:26:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 04:26:08,831 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-02-15 04:26:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:08,832 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 04:26:08,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 04:26:08,832 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 04:26:08,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 04:26:08,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 04:26:08,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.