/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:11:39,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:11:39,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:11:39,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:11:39,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:11:39,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:11:39,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:11:39,706 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:11:39,714 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:11:39,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:11:39,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:11:39,715 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:11:39,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:11:39,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:11:39,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:11:39,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:11:39,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:11:39,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:11:39,717 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:11:39,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:11:39,717 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:11:39,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:11:39,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:11:39,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:11:39,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:11:39,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:11:39,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:39,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:11:39,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:11:39,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:11:39,718 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:11:39,718 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:11:39,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:11:39,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:11:39,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:11:39,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:11:39,927 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:11:39,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2022-02-15 01:11:39,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c2c9f1c/0f0dc0696f0a495a866c6b4a3df704dd/FLAG61c4d242a [2022-02-15 01:11:40,320 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:11:40,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c [2022-02-15 01:11:40,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c2c9f1c/0f0dc0696f0a495a866c6b4a3df704dd/FLAG61c4d242a [2022-02-15 01:11:40,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c2c9f1c/0f0dc0696f0a495a866c6b4a3df704dd [2022-02-15 01:11:40,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:11:40,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:11:40,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:40,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:11:40,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:11:40,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432e7094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40, skipping insertion in model container [2022-02-15 01:11:40,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:11:40,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:11:40,898 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c[600,613] [2022-02-15 01:11:40,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:40,991 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:11:41,008 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c[600,613] [2022-02-15 01:11:41,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:41,042 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:11:41,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41 WrapperNode [2022-02-15 01:11:41,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:41,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:11:41,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:11:41,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:11:41,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41" (1/1) ... [2022-02-15 01:11:41,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41" (1/1) ... [2022-02-15 01:11:41,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41" (1/1) ... [2022-02-15 01:11:41,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41" (1/1) ... [2022-02-15 01:11:41,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41" (1/1) ... [2022-02-15 01:11:41,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41" (1/1) ... [2022-02-15 01:11:41,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41" (1/1) ... [2022-02-15 01:11:41,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:11:41,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:11:41,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:11:41,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:11:41,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41" (1/1) ... [2022-02-15 01:11:41,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:41,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:11:41,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:11:41,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:11:41,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:11:41,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:11:41,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:11:41,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:11:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:11:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:11:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:11:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:11:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:11:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:11:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:11:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:11:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:11:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-02-15 01:11:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:11:41,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:11:41,221 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:11:41,222 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:11:41,307 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:11:41,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:11:41,311 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-15 01:11:41,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:41 BoogieIcfgContainer [2022-02-15 01:11:41,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:11:41,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:11:41,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:11:41,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:11:41,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:11:40" (1/3) ... [2022-02-15 01:11:41,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5934153a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:41, skipping insertion in model container [2022-02-15 01:11:41,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:41" (2/3) ... [2022-02-15 01:11:41,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5934153a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:41, skipping insertion in model container [2022-02-15 01:11:41,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:41" (3/3) ... [2022-02-15 01:11:41,317 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2022-02-15 01:11:41,320 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:11:41,320 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:11:41,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:11:41,374 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:11:41,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:11:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 01:11:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-02-15 01:11:41,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:41,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:41,388 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:41,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2022-02-15 01:11:41,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:41,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232839772] [2022-02-15 01:11:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:41,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:41,443 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,531 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 01:11:41,532 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:41,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232839772] [2022-02-15 01:11:41,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [232839772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:41,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:41,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:11:41,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633621334] [2022-02-15 01:11:41,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:41,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:11:41,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:41,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:11:41,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:11:41,568 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 01:11:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:41,638 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2022-02-15 01:11:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:11:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 9 [2022-02-15 01:11:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:41,647 INFO L225 Difference]: With dead ends: 42 [2022-02-15 01:11:41,647 INFO L226 Difference]: Without dead ends: 23 [2022-02-15 01:11:41,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:11:41,651 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:41,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-15 01:11:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2022-02-15 01:11:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 01:11:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-02-15 01:11:41,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-02-15 01:11:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:41,682 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-02-15 01:11:41,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 01:11:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-02-15 01:11:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-02-15 01:11:41,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:41,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:41,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:11:41,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2022-02-15 01:11:41,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:41,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704523378] [2022-02-15 01:11:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:41,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:41,687 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:41,739 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:41,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704523378] [2022-02-15 01:11:41,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [704523378] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:41,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:41,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:11:41,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262477865] [2022-02-15 01:11:41,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:41,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:11:41,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:11:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:11:41,745 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 01:11:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:41,828 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-02-15 01:11:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:11:41,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 9 [2022-02-15 01:11:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:41,840 INFO L225 Difference]: With dead ends: 36 [2022-02-15 01:11:41,840 INFO L226 Difference]: Without dead ends: 33 [2022-02-15 01:11:41,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:11:41,841 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:41,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:41,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-15 01:11:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2022-02-15 01:11:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 01:11:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-15 01:11:41,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-02-15 01:11:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:41,846 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-15 01:11:41,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 01:11:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-15 01:11:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 01:11:41,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:41,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:41,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:11:41,847 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2022-02-15 01:11:41,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:41,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801785926] [2022-02-15 01:11:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:41,899 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:11:41,899 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:11:41,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:41,992 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:41,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801785926] [2022-02-15 01:11:41,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801785926] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:41,992 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:41,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:11:41,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397910423] [2022-02-15 01:11:41,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:41,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:11:41,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:41,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:11:41,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:11:41,994 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 01:11:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:42,089 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-02-15 01:11:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:11:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2022-02-15 01:11:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:42,090 INFO L225 Difference]: With dead ends: 48 [2022-02-15 01:11:42,090 INFO L226 Difference]: Without dead ends: 39 [2022-02-15 01:11:42,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:11:42,091 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:42,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 19 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-15 01:11:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 17. [2022-02-15 01:11:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 01:11:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-15 01:11:42,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-02-15 01:11:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:42,095 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-15 01:11:42,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 01:11:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-15 01:11:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 01:11:42,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:42,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:42,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:11:42,096 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2022-02-15 01:11:42,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:42,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377480103] [2022-02-15 01:11:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:42,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:11:42,157 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:11:42,157 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:11:42,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:42,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:42,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377480103] [2022-02-15 01:11:42,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [377480103] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:42,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:42,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:11:42,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378478535] [2022-02-15 01:11:42,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:42,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:11:42,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:42,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:11:42,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:11:42,262 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 01:11:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:42,349 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-02-15 01:11:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:42,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 15 [2022-02-15 01:11:42,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:42,351 INFO L225 Difference]: With dead ends: 36 [2022-02-15 01:11:42,351 INFO L226 Difference]: Without dead ends: 27 [2022-02-15 01:11:42,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:42,359 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:42,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 31 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-15 01:11:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2022-02-15 01:11:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 01:11:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-02-15 01:11:42,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2022-02-15 01:11:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:42,375 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-02-15 01:11:42,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 01:11:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-02-15 01:11:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:11:42,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:42,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:42,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:11:42,376 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2022-02-15 01:11:42,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:42,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051448590] [2022-02-15 01:11:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:43,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:43,490 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:43,491 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:43,491 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:43,494 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:43,494 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:43,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:43,497 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:43,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:43,589 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:43,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051448590] [2022-02-15 01:11:43,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051448590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:43,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:43,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:11:43,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765502515] [2022-02-15 01:11:43,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:11:43,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:11:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:11:43,590 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 01:11:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:43,630 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-02-15 01:11:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:11:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2022-02-15 01:11:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:43,633 INFO L225 Difference]: With dead ends: 31 [2022-02-15 01:11:43,634 INFO L226 Difference]: Without dead ends: 22 [2022-02-15 01:11:43,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:11:43,639 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:43,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-15 01:11:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-02-15 01:11:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 01:11:43,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-02-15 01:11:43,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-02-15 01:11:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:43,643 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-02-15 01:11:43,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 01:11:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-02-15 01:11:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:11:43,643 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:43,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:43,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:11:43,644 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 2 times [2022-02-15 01:11:43,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:43,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824431868] [2022-02-15 01:11:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:45,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:45,119 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:45,119 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:45,119 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:45,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:45,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:45,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:45,123 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:45,191 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:45,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824431868] [2022-02-15 01:11:45,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824431868] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:45,191 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:45,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:11:45,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656972648] [2022-02-15 01:11:45,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:45,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:11:45,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:11:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:11:45,192 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 01:11:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:45,234 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-02-15 01:11:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:11:45,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 19 [2022-02-15 01:11:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:45,235 INFO L225 Difference]: With dead ends: 36 [2022-02-15 01:11:45,235 INFO L226 Difference]: Without dead ends: 24 [2022-02-15 01:11:45,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:11:45,236 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:45,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 46 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-15 01:11:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-02-15 01:11:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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 01:11:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-02-15 01:11:45,239 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-02-15 01:11:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:45,239 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-02-15 01:11:45,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 01:11:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-02-15 01:11:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 01:11:45,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:45,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:45,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:11:45,240 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash -617772747, now seen corresponding path program 3 times [2022-02-15 01:11:45,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:45,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210401123] [2022-02-15 01:11:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:47,362 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,362 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,363 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,363 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,369 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:47,370 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:47,446 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:47,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210401123] [2022-02-15 01:11:47,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210401123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:47,446 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:47,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:11:47,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479535026] [2022-02-15 01:11:47,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:47,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:11:47,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:11:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:11:47,447 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 01:11:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:47,494 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-02-15 01:11:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:11:47,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2022-02-15 01:11:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:47,495 INFO L225 Difference]: With dead ends: 40 [2022-02-15 01:11:47,495 INFO L226 Difference]: Without dead ends: 26 [2022-02-15 01:11:47,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:47,496 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:47,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-15 01:11:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-02-15 01:11:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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 01:11:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-02-15 01:11:47,499 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2022-02-15 01:11:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:47,499 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-02-15 01:11:47,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 01:11:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-02-15 01:11:47,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 01:11:47,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:47,500 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:47,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:11:47,500 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:47,501 INFO L85 PathProgramCache]: Analyzing trace with hash -272617773, now seen corresponding path program 4 times [2022-02-15 01:11:47,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:47,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598157236] [2022-02-15 01:11:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:49,045 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,045 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,045 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,045 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,049 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:49,051 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:49,199 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:49,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598157236] [2022-02-15 01:11:49,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [598157236] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:49,200 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:49,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:49,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993164978] [2022-02-15 01:11:49,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:49,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:49,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:49,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:49,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:49,201 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 01:11:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:49,288 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-02-15 01:11:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:49,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 01:11:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:49,291 INFO L225 Difference]: With dead ends: 44 [2022-02-15 01:11:49,291 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 01:11:49,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:49,292 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:49,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 01:11:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-02-15 01:11:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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 01:11:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-02-15 01:11:49,299 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2022-02-15 01:11:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:49,299 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-02-15 01:11:49,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 01:11:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-02-15 01:11:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:11:49,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:49,300 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:49,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:11:49,300 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:49,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash 708830449, now seen corresponding path program 5 times [2022-02-15 01:11:49,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:49,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216174818] [2022-02-15 01:11:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:50,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:50,821 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:50,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:50,822 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:50,826 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:50,826 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:50,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:50,828 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:50,970 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:50,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216174818] [2022-02-15 01:11:50,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216174818] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:50,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:50,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:11:50,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545281388] [2022-02-15 01:11:50,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:50,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:11:50,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:50,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:11:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:50,972 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 01:11:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:51,061 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-02-15 01:11:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:11:51,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 01:11:51,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:51,063 INFO L225 Difference]: With dead ends: 48 [2022-02-15 01:11:51,063 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 01:11:51,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:11:51,065 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:51,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 66 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 01:11:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-02-15 01:11:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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 01:11:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-02-15 01:11:51,070 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2022-02-15 01:11:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:51,071 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-02-15 01:11:51,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 01:11:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-02-15 01:11:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 01:11:51,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:51,072 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:51,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:11:51,072 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1012233329, now seen corresponding path program 6 times [2022-02-15 01:11:51,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:51,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648172466] [2022-02-15 01:11:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:53,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:53,050 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:53,051 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:53,051 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:53,056 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:53,056 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:53,057 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:53,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:53,195 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:53,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648172466] [2022-02-15 01:11:53,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1648172466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:53,195 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:53,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:11:53,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950705607] [2022-02-15 01:11:53,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:53,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:11:53,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:53,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:11:53,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:11:53,197 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 01:11:53,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:53,315 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-02-15 01:11:53,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:11:53,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 01:11:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:53,316 INFO L225 Difference]: With dead ends: 52 [2022-02-15 01:11:53,316 INFO L226 Difference]: Without dead ends: 32 [2022-02-15 01:11:53,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:11:53,317 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:53,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-15 01:11:53,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-02-15 01:11:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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 01:11:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-02-15 01:11:53,330 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2022-02-15 01:11:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:53,330 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-02-15 01:11:53,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 01:11:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-02-15 01:11:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:11:53,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:53,333 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:53,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:11:53,333 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1392115027, now seen corresponding path program 7 times [2022-02-15 01:11:53,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:53,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805488213] [2022-02-15 01:11:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:55,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:55,200 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:55,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:55,201 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:55,207 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:55,207 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:55,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:55,208 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:55,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:55,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:55,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805488213] [2022-02-15 01:11:55,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [805488213] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:55,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:55,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:11:55,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456488965] [2022-02-15 01:11:55,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:55,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:11:55,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:55,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:11:55,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:11:55,324 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 01:11:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:55,421 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-02-15 01:11:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:11:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 01:11:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:55,422 INFO L225 Difference]: With dead ends: 56 [2022-02-15 01:11:55,422 INFO L226 Difference]: Without dead ends: 34 [2022-02-15 01:11:55,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:11:55,423 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:55,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-15 01:11:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-02-15 01:11:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 01:11:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-02-15 01:11:55,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2022-02-15 01:11:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:55,426 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-02-15 01:11:55,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 01:11:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-02-15 01:11:55,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:11:55,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:55,426 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:55,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:11:55,427 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1386206645, now seen corresponding path program 8 times [2022-02-15 01:11:55,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:55,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533444186] [2022-02-15 01:11:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:57,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:57,185 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:57,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:57,185 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:57,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:57,219 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:57,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:57,220 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:57,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:57,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:57,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533444186] [2022-02-15 01:11:57,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [533444186] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:57,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:57,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:11:57,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60446001] [2022-02-15 01:11:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:57,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:11:57,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:57,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:11:57,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:11:57,373 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 01:11:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:57,485 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-02-15 01:11:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:11:57,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 01:11:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:57,486 INFO L225 Difference]: With dead ends: 60 [2022-02-15 01:11:57,486 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 01:11:57,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:11:57,486 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:57,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 56 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 01:11:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-02-15 01:11:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 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 01:11:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-02-15 01:11:57,490 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2022-02-15 01:11:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:57,490 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-02-15 01:11:57,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 01:11:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-02-15 01:11:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:11:57,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:57,491 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:57,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:11:57,491 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash -3218839, now seen corresponding path program 9 times [2022-02-15 01:11:57,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:57,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134733431] [2022-02-15 01:11:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:59,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:59,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:59,705 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:59,705 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:59,711 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:59,711 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:59,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:59,712 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:59,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:59,878 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:59,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134733431] [2022-02-15 01:11:59,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1134733431] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:59,879 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:59,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:11:59,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137236023] [2022-02-15 01:11:59,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:59,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:11:59,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:59,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:11:59,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:11:59,880 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 01:12:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:00,011 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-02-15 01:12:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:12:00,011 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 01:12:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:00,011 INFO L225 Difference]: With dead ends: 64 [2022-02-15 01:12:00,011 INFO L226 Difference]: Without dead ends: 38 [2022-02-15 01:12:00,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:12:00,012 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:00,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 46 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-15 01:12:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-02-15 01:12:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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 01:12:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-02-15 01:12:00,015 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2022-02-15 01:12:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:00,015 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-02-15 01:12:00,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 01:12:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-02-15 01:12:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:12:00,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:00,016 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:00,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:12:00,016 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1903168263, now seen corresponding path program 10 times [2022-02-15 01:12:00,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:00,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096792630] [2022-02-15 01:12:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:01,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:01,490 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:01,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:01,490 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:01,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:01,498 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:01,515 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:01,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:01,739 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:01,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096792630] [2022-02-15 01:12:01,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1096792630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:01,739 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:01,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:12:01,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548682698] [2022-02-15 01:12:01,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:01,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:12:01,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:12:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:12:01,740 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 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 01:12:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:01,953 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-02-15 01:12:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:12:01,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 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 35 [2022-02-15 01:12:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:01,954 INFO L225 Difference]: With dead ends: 68 [2022-02-15 01:12:01,954 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 01:12:01,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:12:01,955 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:01,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 01:12:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-02-15 01:12:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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 01:12:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-02-15 01:12:01,958 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2022-02-15 01:12:01,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:01,958 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-02-15 01:12:01,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 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 01:12:01,958 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-02-15 01:12:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 01:12:01,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:01,959 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:01,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:12:01,959 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash -9862107, now seen corresponding path program 11 times [2022-02-15 01:12:01,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:01,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738612650] [2022-02-15 01:12:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:03,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:03,228 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:03,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:03,228 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:03,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:03,237 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:03,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:03,238 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:03,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:03,429 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:03,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738612650] [2022-02-15 01:12:03,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [738612650] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:03,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:03,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:12:03,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613375055] [2022-02-15 01:12:03,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:03,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:12:03,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:03,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:12:03,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:12:03,431 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 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 01:12:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:03,606 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-02-15 01:12:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:12:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 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 37 [2022-02-15 01:12:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:03,607 INFO L225 Difference]: With dead ends: 72 [2022-02-15 01:12:03,607 INFO L226 Difference]: Without dead ends: 42 [2022-02-15 01:12:03,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:12:03,608 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:03,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-15 01:12:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-02-15 01:12:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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 01:12:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-02-15 01:12:03,610 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-02-15 01:12:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:03,610 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-02-15 01:12:03,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 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 01:12:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-02-15 01:12:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 01:12:03,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:03,611 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:03,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:12:03,611 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash -186044989, now seen corresponding path program 12 times [2022-02-15 01:12:03,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:03,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449993] [2022-02-15 01:12:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:05,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:05,236 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:05,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:05,237 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:05,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:05,247 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:05,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:05,248 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:05,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:05,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:05,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449993] [2022-02-15 01:12:05,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [449993] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:05,513 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:05,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:12:05,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117215058] [2022-02-15 01:12:05,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:05,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:12:05,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:05,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:12:05,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:12:05,515 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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 01:12:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:05,728 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-02-15 01:12:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:12:05,728 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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 39 [2022-02-15 01:12:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:05,729 INFO L225 Difference]: With dead ends: 76 [2022-02-15 01:12:05,729 INFO L226 Difference]: Without dead ends: 44 [2022-02-15 01:12:05,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:12:05,730 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:05,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-15 01:12:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-02-15 01:12:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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 01:12:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-02-15 01:12:05,733 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2022-02-15 01:12:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:05,733 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-02-15 01:12:05,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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 01:12:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-02-15 01:12:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:12:05,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:05,733 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:05,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:12:05,734 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:05,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:05,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1994070047, now seen corresponding path program 13 times [2022-02-15 01:12:05,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:05,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785616245] [2022-02-15 01:12:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:07,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:07,084 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:07,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:07,084 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:07,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:07,095 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:07,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:07,095 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:07,341 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:07,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785616245] [2022-02-15 01:12:07,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [785616245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:07,341 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:07,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:12:07,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751795666] [2022-02-15 01:12:07,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:07,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:12:07,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:07,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:12:07,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:12:07,342 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 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 01:12:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:07,593 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-02-15 01:12:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:12:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 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 41 [2022-02-15 01:12:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:07,594 INFO L225 Difference]: With dead ends: 80 [2022-02-15 01:12:07,594 INFO L226 Difference]: Without dead ends: 46 [2022-02-15 01:12:07,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:12:07,595 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:07,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 136 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-15 01:12:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-02-15 01:12:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 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 01:12:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-02-15 01:12:07,598 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2022-02-15 01:12:07,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:07,598 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-02-15 01:12:07,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 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 01:12:07,598 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-02-15 01:12:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 01:12:07,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:07,599 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:07,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:12:07,599 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:07,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash -44395905, now seen corresponding path program 14 times [2022-02-15 01:12:07,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:07,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830699223] [2022-02-15 01:12:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:10,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:10,008 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:10,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:10,008 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:10,022 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:10,022 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:10,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:10,023 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:10,243 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:10,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830699223] [2022-02-15 01:12:10,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830699223] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:10,243 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:10,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:12:10,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404278791] [2022-02-15 01:12:10,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:10,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:12:10,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:10,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:12:10,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:12:10,244 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 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 01:12:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:10,549 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-02-15 01:12:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:12:10,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 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 43 [2022-02-15 01:12:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:10,549 INFO L225 Difference]: With dead ends: 84 [2022-02-15 01:12:10,549 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 01:12:10,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:12:10,552 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:10,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 126 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 01:12:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-02-15 01:12:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 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 01:12:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-02-15 01:12:10,562 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2022-02-15 01:12:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:10,563 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-02-15 01:12:10,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 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 01:12:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-02-15 01:12:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 01:12:10,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:10,564 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:10,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:12:10,565 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:10,565 INFO L85 PathProgramCache]: Analyzing trace with hash 986713501, now seen corresponding path program 15 times [2022-02-15 01:12:10,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:10,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021423748] [2022-02-15 01:12:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:12,787 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:12,788 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:12,788 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:12,788 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:12,800 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:12,800 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:12,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:12,801 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:13,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:13,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021423748] [2022-02-15 01:12:13,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1021423748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:13,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:13,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:12:13,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048354035] [2022-02-15 01:12:13,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:13,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:12:13,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:12:13,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:12:13,029 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 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 01:12:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:13,322 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2022-02-15 01:12:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:12:13,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 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 45 [2022-02-15 01:12:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:13,323 INFO L225 Difference]: With dead ends: 88 [2022-02-15 01:12:13,323 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 01:12:13,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:12:13,324 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:13,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 106 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 01:12:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-02-15 01:12:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 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 01:12:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-02-15 01:12:13,328 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2022-02-15 01:12:13,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:13,329 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-02-15 01:12:13,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 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 01:12:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-02-15 01:12:13,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:12:13,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:13,329 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:13,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:12:13,329 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:13,330 INFO L85 PathProgramCache]: Analyzing trace with hash -254592709, now seen corresponding path program 16 times [2022-02-15 01:12:13,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:13,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395040274] [2022-02-15 01:12:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:15,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:15,459 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:15,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:15,460 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:15,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:15,471 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:15,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:15,472 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:15,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:15,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:15,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395040274] [2022-02-15 01:12:15,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [395040274] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:15,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:15,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:12:15,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019523050] [2022-02-15 01:12:15,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:15,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:12:15,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:15,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:12:15,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:12:15,716 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 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 01:12:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:16,060 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2022-02-15 01:12:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:12:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 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 47 [2022-02-15 01:12:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:16,061 INFO L225 Difference]: With dead ends: 92 [2022-02-15 01:12:16,061 INFO L226 Difference]: Without dead ends: 52 [2022-02-15 01:12:16,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:12:16,062 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:16,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 166 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-15 01:12:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-02-15 01:12:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 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 01:12:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-02-15 01:12:16,065 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2022-02-15 01:12:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:16,066 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-02-15 01:12:16,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 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 01:12:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-02-15 01:12:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:12:16,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:16,066 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:16,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:12:16,066 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:16,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:16,067 INFO L85 PathProgramCache]: Analyzing trace with hash 851047769, now seen corresponding path program 17 times [2022-02-15 01:12:16,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:16,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042801018] [2022-02-15 01:12:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:17,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:17,959 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:17,960 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:17,960 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:17,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:17,974 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:17,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:17,975 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:18,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:18,272 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:18,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042801018] [2022-02-15 01:12:18,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042801018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:18,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:18,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:12:18,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338491517] [2022-02-15 01:12:18,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:18,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:12:18,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:12:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:12:18,274 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 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 01:12:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:18,665 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-02-15 01:12:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:12:18,665 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 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 49 [2022-02-15 01:12:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:18,666 INFO L225 Difference]: With dead ends: 96 [2022-02-15 01:12:18,666 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 01:12:18,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:12:18,666 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:18,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 136 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 01:12:18,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-02-15 01:12:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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 01:12:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-02-15 01:12:18,670 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2022-02-15 01:12:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:18,670 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-02-15 01:12:18,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 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 01:12:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-02-15 01:12:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:12:18,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:18,670 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:18,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:12:18,671 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1780342281, now seen corresponding path program 18 times [2022-02-15 01:12:18,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:18,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452028469] [2022-02-15 01:12:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:20,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:20,360 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:20,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:20,360 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:20,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:20,374 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:20,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:20,375 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:20,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:20,654 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:20,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452028469] [2022-02-15 01:12:20,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [452028469] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:20,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:20,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:12:20,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465063297] [2022-02-15 01:12:20,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:20,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:12:20,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:20,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:12:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:12:20,655 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 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 01:12:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:21,067 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2022-02-15 01:12:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:12:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 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 51 [2022-02-15 01:12:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:21,068 INFO L225 Difference]: With dead ends: 100 [2022-02-15 01:12:21,068 INFO L226 Difference]: Without dead ends: 56 [2022-02-15 01:12:21,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:12:21,069 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:21,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 136 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-15 01:12:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-02-15 01:12:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 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 01:12:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-02-15 01:12:21,073 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2022-02-15 01:12:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:21,073 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-02-15 01:12:21,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 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 01:12:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-02-15 01:12:21,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:12:21,074 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:21,074 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:21,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:12:21,074 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash -810442987, now seen corresponding path program 19 times [2022-02-15 01:12:21,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:21,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23436019] [2022-02-15 01:12:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:22,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:22,885 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:22,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:22,885 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:22,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:22,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:22,901 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:23,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:23,200 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:23,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23436019] [2022-02-15 01:12:23,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [23436019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:23,200 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:23,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:12:23,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332726662] [2022-02-15 01:12:23,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:23,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:12:23,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:23,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:12:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:12:23,201 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 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 01:12:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:23,661 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-02-15 01:12:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:12:23,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 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 53 [2022-02-15 01:12:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:23,662 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:12:23,662 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 01:12:23,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:12:23,662 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:23,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 126 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 01:12:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-02-15 01:12:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 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 01:12:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-02-15 01:12:23,665 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2022-02-15 01:12:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:23,666 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-02-15 01:12:23,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 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 01:12:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-02-15 01:12:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:12:23,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:23,666 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:23,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:12:23,666 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:23,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:23,667 INFO L85 PathProgramCache]: Analyzing trace with hash -745124685, now seen corresponding path program 20 times [2022-02-15 01:12:23,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:23,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48874724] [2022-02-15 01:12:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:25,577 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:25,578 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:25,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:25,578 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:25,594 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:25,595 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:25,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:25,596 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:25,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:25,915 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 01:12:25,915 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:25,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48874724] [2022-02-15 01:12:25,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [48874724] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:25,915 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:25,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:12:25,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234874005] [2022-02-15 01:12:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:25,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:12:25,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:12:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:12:25,916 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 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 01:12:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:26,425 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2022-02-15 01:12:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:12:26,425 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 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 55 [2022-02-15 01:12:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:26,426 INFO L225 Difference]: With dead ends: 108 [2022-02-15 01:12:26,426 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 01:12:26,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:12:26,426 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:26,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 226 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:26,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 01:12:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-02-15 01:12:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 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 01:12:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-02-15 01:12:26,430 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2022-02-15 01:12:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:26,430 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-02-15 01:12:26,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 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 01:12:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-02-15 01:12:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 01:12:26,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:26,430 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:26,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:12:26,430 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1896221393, now seen corresponding path program 21 times [2022-02-15 01:12:26,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:26,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052983498] [2022-02-15 01:12:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:28,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:28,246 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:28,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:28,247 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:28,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:28,263 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:28,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:28,264 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:28,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:28,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:28,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052983498] [2022-02-15 01:12:28,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1052983498] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:28,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:28,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:12:28,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730782222] [2022-02-15 01:12:28,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:28,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:12:28,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:28,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:12:28,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:12:28,600 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 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 01:12:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:29,134 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2022-02-15 01:12:29,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:12:29,135 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 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 57 [2022-02-15 01:12:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:29,135 INFO L225 Difference]: With dead ends: 112 [2022-02-15 01:12:29,135 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 01:12:29,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:12:29,136 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:29,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 66 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:29,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 01:12:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-02-15 01:12:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 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 01:12:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-02-15 01:12:29,139 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2022-02-15 01:12:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:29,139 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-02-15 01:12:29,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 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 01:12:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-02-15 01:12:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:12:29,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:29,140 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:29,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:12:29,140 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:29,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:29,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1904130415, now seen corresponding path program 22 times [2022-02-15 01:12:29,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:29,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968952266] [2022-02-15 01:12:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:31,417 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:31,418 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:31,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:31,418 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:31,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:31,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:31,439 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:31,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:31,819 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:31,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968952266] [2022-02-15 01:12:31,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1968952266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:31,819 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:31,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:12:31,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536931023] [2022-02-15 01:12:31,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:31,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:12:31,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:12:31,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:12:31,821 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 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 01:12:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:32,366 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-02-15 01:12:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:12:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 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 59 [2022-02-15 01:12:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:32,367 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:12:32,367 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 01:12:32,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:12:32,369 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:32,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 01:12:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-02-15 01:12:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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 01:12:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-02-15 01:12:32,377 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2022-02-15 01:12:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:32,377 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-02-15 01:12:32,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 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 01:12:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-02-15 01:12:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:12:32,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:32,380 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:32,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:12:32,380 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash 914765965, now seen corresponding path program 23 times [2022-02-15 01:12:32,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:32,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238547441] [2022-02-15 01:12:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:34,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:34,160 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:34,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:34,160 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:34,178 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:34,178 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:34,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:34,190 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:34,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:34,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:34,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238547441] [2022-02-15 01:12:34,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [238547441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:34,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:34,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:12:34,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138782863] [2022-02-15 01:12:34,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:34,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:12:34,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:12:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:12:34,627 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 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 01:12:35,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:35,299 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2022-02-15 01:12:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:12:35,299 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 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 61 [2022-02-15 01:12:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:35,300 INFO L225 Difference]: With dead ends: 120 [2022-02-15 01:12:35,300 INFO L226 Difference]: Without dead ends: 66 [2022-02-15 01:12:35,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:12:35,300 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:35,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 206 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-15 01:12:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-02-15 01:12:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 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 01:12:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-02-15 01:12:35,304 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2022-02-15 01:12:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:35,304 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-02-15 01:12:35,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 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 01:12:35,304 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-02-15 01:12:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:12:35,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:35,304 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:35,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:12:35,304 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:35,305 INFO L85 PathProgramCache]: Analyzing trace with hash -676698069, now seen corresponding path program 24 times [2022-02-15 01:12:35,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:35,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267245623] [2022-02-15 01:12:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:37,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:37,553 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:37,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:37,553 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:37,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:37,575 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:37,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:37,576 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:38,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:38,159 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:38,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267245623] [2022-02-15 01:12:38,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [267245623] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:38,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:38,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:12:38,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841865699] [2022-02-15 01:12:38,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:38,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:12:38,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:12:38,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:12:38,160 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 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 01:12:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:38,801 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2022-02-15 01:12:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:12:38,801 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 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 63 [2022-02-15 01:12:38,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:38,802 INFO L225 Difference]: With dead ends: 124 [2022-02-15 01:12:38,802 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 01:12:38,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:12:38,803 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:38,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 136 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 01:12:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-02-15 01:12:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 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 01:12:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-02-15 01:12:38,806 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2022-02-15 01:12:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:38,807 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-02-15 01:12:38,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 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 01:12:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-02-15 01:12:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:12:38,807 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:38,807 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:38,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:12:38,807 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1065277367, now seen corresponding path program 25 times [2022-02-15 01:12:38,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:38,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021176038] [2022-02-15 01:12:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:41,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:41,003 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:41,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:41,003 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:41,024 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:41,024 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:41,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:41,025 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:41,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:41,474 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:41,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021176038] [2022-02-15 01:12:41,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1021176038] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:41,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:41,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:12:41,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931063013] [2022-02-15 01:12:41,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:41,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:12:41,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:12:41,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:12:41,475 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 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 01:12:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:42,231 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2022-02-15 01:12:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:12:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 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 65 [2022-02-15 01:12:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:42,232 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:12:42,232 INFO L226 Difference]: Without dead ends: 70 [2022-02-15 01:12:42,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:12:42,232 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:42,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 146 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:12:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-15 01:12:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-02-15 01:12:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 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 01:12:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-02-15 01:12:42,236 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2022-02-15 01:12:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:42,236 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-02-15 01:12:42,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 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 01:12:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-02-15 01:12:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 01:12:42,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:42,236 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:42,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:12:42,237 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash -827827993, now seen corresponding path program 26 times [2022-02-15 01:12:42,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:42,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675096687] [2022-02-15 01:12:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:46,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:46,017 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:46,017 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:46,017 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:46,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:46,049 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:46,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:46,050 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:46,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:46,551 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:46,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675096687] [2022-02-15 01:12:46,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [675096687] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:46,551 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:46,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:12:46,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876220835] [2022-02-15 01:12:46,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:46,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:12:46,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:12:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:12:46,553 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 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 01:12:47,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:47,335 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2022-02-15 01:12:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:12:47,335 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 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 67 [2022-02-15 01:12:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:47,335 INFO L225 Difference]: With dead ends: 132 [2022-02-15 01:12:47,336 INFO L226 Difference]: Without dead ends: 72 [2022-02-15 01:12:47,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:12:47,336 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:47,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 106 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:12:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-15 01:12:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-02-15 01:12:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 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 01:12:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-02-15 01:12:47,340 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2022-02-15 01:12:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:47,340 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-02-15 01:12:47,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 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 01:12:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-02-15 01:12:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:12:47,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:47,340 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:47,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:12:47,341 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash -272246267, now seen corresponding path program 27 times [2022-02-15 01:12:47,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:47,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373493550] [2022-02-15 01:12:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:49,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:49,385 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:49,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:49,385 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:49,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:49,423 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:49,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:49,425 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:49,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:49,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:49,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373493550] [2022-02-15 01:12:49,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373493550] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:49,926 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:49,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:12:49,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141693522] [2022-02-15 01:12:49,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:49,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:12:49,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:49,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:12:49,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:12:49,927 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 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 01:12:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:50,821 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2022-02-15 01:12:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:12:50,821 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 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 69 [2022-02-15 01:12:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:50,822 INFO L225 Difference]: With dead ends: 136 [2022-02-15 01:12:50,822 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 01:12:50,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:12:50,823 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:50,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 266 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:12:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 01:12:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-02-15 01:12:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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 01:12:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-02-15 01:12:50,826 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2022-02-15 01:12:50,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:50,826 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-02-15 01:12:50,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 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 01:12:50,826 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-02-15 01:12:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:12:50,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:50,827 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:50,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:12:50,827 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:50,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1065847715, now seen corresponding path program 28 times [2022-02-15 01:12:50,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:50,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030365996] [2022-02-15 01:12:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:53,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:53,364 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:53,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:53,364 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:53,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:53,393 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:53,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:53,395 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:53,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:53,923 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:53,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030365996] [2022-02-15 01:12:53,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030365996] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:53,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:53,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:12:53,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652622582] [2022-02-15 01:12:53,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:53,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:12:53,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:12:53,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:12:53,924 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 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 01:12:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:54,634 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2022-02-15 01:12:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:12:54,634 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 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 71 [2022-02-15 01:12:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:54,635 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:12:54,635 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 01:12:54,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:12:54,635 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:54,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 186 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:12:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 01:12:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-02-15 01:12:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 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 01:12:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-02-15 01:12:54,639 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2022-02-15 01:12:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:54,639 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-02-15 01:12:54,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 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 01:12:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-02-15 01:12:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 01:12:54,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:54,639 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:54,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:12:54,640 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1516024383, now seen corresponding path program 29 times [2022-02-15 01:12:54,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:54,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650111819] [2022-02-15 01:12:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:56,910 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:56,910 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:56,910 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:56,910 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:56,943 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:56,943 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:56,945 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:57,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:57,511 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:57,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650111819] [2022-02-15 01:12:57,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650111819] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:57,511 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:57,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:12:57,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187421736] [2022-02-15 01:12:57,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:57,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:12:57,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:12:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:12:57,512 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 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 01:12:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:58,520 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2022-02-15 01:12:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:12:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 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 73 [2022-02-15 01:12:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:58,520 INFO L225 Difference]: With dead ends: 144 [2022-02-15 01:12:58,521 INFO L226 Difference]: Without dead ends: 78 [2022-02-15 01:12:58,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:12:58,521 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:58,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 106 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:12:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-15 01:12:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-02-15 01:12:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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 01:12:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-02-15 01:12:58,525 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2022-02-15 01:12:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:58,525 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-02-15 01:12:58,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 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 01:12:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-02-15 01:12:58,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 01:12:58,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:58,526 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:58,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:12:58,526 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:58,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:58,526 INFO L85 PathProgramCache]: Analyzing trace with hash -204013473, now seen corresponding path program 30 times [2022-02-15 01:12:58,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:58,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167652356] [2022-02-15 01:12:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:01,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:01,812 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:01,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:01,812 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:01,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:01,858 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:01,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:01,860 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:02,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:02,499 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:02,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167652356] [2022-02-15 01:13:02,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167652356] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:02,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:02,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:13:02,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371440137] [2022-02-15 01:13:02,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:02,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:13:02,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:13:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:13:02,500 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 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 01:13:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:03,601 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2022-02-15 01:13:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:13:03,601 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 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 75 [2022-02-15 01:13:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:03,601 INFO L225 Difference]: With dead ends: 148 [2022-02-15 01:13:03,602 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:13:03,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:13:03,602 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:03,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 146 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:13:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:13:03,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-02-15 01:13:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 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 01:13:03,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-02-15 01:13:03,606 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2022-02-15 01:13:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:03,606 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-02-15 01:13:03,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 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 01:13:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-02-15 01:13:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:13:03,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:03,606 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:03,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:13:03,607 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2081913987, now seen corresponding path program 31 times [2022-02-15 01:13:03,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:03,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652365239] [2022-02-15 01:13:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:07,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:07,160 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:07,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:07,160 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:07,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:07,231 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:07,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:07,233 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:07,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:07,861 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:07,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652365239] [2022-02-15 01:13:07,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652365239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:07,861 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:07,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:13:07,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550451283] [2022-02-15 01:13:07,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:07,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:13:07,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:07,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:13:07,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:13:07,862 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 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 01:13:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:09,011 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2022-02-15 01:13:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:13:09,011 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 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 77 [2022-02-15 01:13:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:09,012 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:13:09,012 INFO L226 Difference]: Without dead ends: 82 [2022-02-15 01:13:09,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:13:09,013 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:09,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 56 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:13:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-15 01:13:09,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-02-15 01:13:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 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 01:13:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-02-15 01:13:09,016 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2022-02-15 01:13:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:09,016 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-02-15 01:13:09,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 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 01:13:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-02-15 01:13:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 01:13:09,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:09,017 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:09,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:13:09,017 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1436923675, now seen corresponding path program 32 times [2022-02-15 01:13:09,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:09,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474425725] [2022-02-15 01:13:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:13,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:13,026 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:13,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:13,026 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:13,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:13,086 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:13,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:13,088 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:13,693 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 01:13:13,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:13,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474425725] [2022-02-15 01:13:13,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474425725] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:13,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:13,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:13:13,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547723153] [2022-02-15 01:13:13,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:13,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:13:13,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:13,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:13:13,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:13:13,695 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 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 01:13:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:14,963 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2022-02-15 01:13:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:13:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 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 79 [2022-02-15 01:13:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:14,964 INFO L225 Difference]: With dead ends: 156 [2022-02-15 01:13:14,964 INFO L226 Difference]: Without dead ends: 84 [2022-02-15 01:13:14,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:13:14,965 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:14,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 246 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:13:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-15 01:13:14,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-02-15 01:13:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 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 01:13:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-02-15 01:13:14,968 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2022-02-15 01:13:14,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:14,969 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-02-15 01:13:14,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 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 01:13:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-02-15 01:13:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 01:13:14,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:14,969 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:14,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:13:14,969 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1394312391, now seen corresponding path program 33 times [2022-02-15 01:13:14,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:14,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965619136] [2022-02-15 01:13:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:17,968 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:17,968 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:17,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:17,969 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:18,007 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:18,008 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:18,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:18,009 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:18,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:18,734 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:18,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965619136] [2022-02-15 01:13:18,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965619136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:18,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:18,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:13:18,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532842453] [2022-02-15 01:13:18,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:18,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:13:18,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:13:18,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:13:18,735 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 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 01:13:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:20,111 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2022-02-15 01:13:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:13:20,112 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 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 81 [2022-02-15 01:13:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:20,112 INFO L225 Difference]: With dead ends: 160 [2022-02-15 01:13:20,112 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 01:13:20,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:13:20,113 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:20,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 286 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:13:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 01:13:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-02-15 01:13:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 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 01:13:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-02-15 01:13:20,117 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2022-02-15 01:13:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:20,117 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-02-15 01:13:20,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 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 01:13:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-02-15 01:13:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:13:20,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:20,118 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:20,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:13:20,118 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 797093847, now seen corresponding path program 34 times [2022-02-15 01:13:20,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:20,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009554642] [2022-02-15 01:13:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:24,194 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:24,194 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:24,194 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:24,194 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:24,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:24,233 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:24,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:24,234 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:24,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:24,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:24,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009554642] [2022-02-15 01:13:24,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2009554642] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:24,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:24,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:13:24,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18650956] [2022-02-15 01:13:24,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:24,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:13:24,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:24,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:13:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:13:24,968 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 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 01:13:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:26,414 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2022-02-15 01:13:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:13:26,414 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 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 83 [2022-02-15 01:13:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:26,414 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:13:26,414 INFO L226 Difference]: Without dead ends: 88 [2022-02-15 01:13:26,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:13:26,415 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 2539 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:26,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 296 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2539 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:13:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-15 01:13:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-02-15 01:13:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 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 01:13:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-02-15 01:13:26,419 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2022-02-15 01:13:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:26,419 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-02-15 01:13:26,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 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 01:13:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-02-15 01:13:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 01:13:26,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:26,420 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:26,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:13:26,420 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:26,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2090453771, now seen corresponding path program 35 times [2022-02-15 01:13:26,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:26,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10604426] [2022-02-15 01:13:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:31,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:31,263 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:31,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:31,263 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:31,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:31,307 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:31,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:31,308 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:32,134 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:32,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10604426] [2022-02-15 01:13:32,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [10604426] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:32,134 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:32,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 01:13:32,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687124971] [2022-02-15 01:13:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:32,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 01:13:32,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 01:13:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:13:32,136 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 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 01:13:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:33,709 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2022-02-15 01:13:33,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:13:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 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 85 [2022-02-15 01:13:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:33,710 INFO L225 Difference]: With dead ends: 168 [2022-02-15 01:13:33,710 INFO L226 Difference]: Without dead ends: 90 [2022-02-15 01:13:33,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:13:33,711 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:33,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 206 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2644 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:13:33,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-15 01:13:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-02-15 01:13:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 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 01:13:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-02-15 01:13:33,715 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2022-02-15 01:13:33,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:33,716 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-02-15 01:13:33,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 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 01:13:33,716 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-02-15 01:13:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-15 01:13:33,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:33,716 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:33,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:13:33,717 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:33,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1820125843, now seen corresponding path program 36 times [2022-02-15 01:13:33,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:33,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489594003] [2022-02-15 01:13:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:37,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:37,515 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:37,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:37,515 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:37,571 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:37,571 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:37,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:37,573 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:38,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:38,388 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:38,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489594003] [2022-02-15 01:13:38,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [489594003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:38,388 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:38,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:13:38,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49205641] [2022-02-15 01:13:38,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:38,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:13:38,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:13:38,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:13:38,390 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 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 01:13:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:39,981 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2022-02-15 01:13:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:13:39,981 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 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 87 [2022-02-15 01:13:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:39,982 INFO L225 Difference]: With dead ends: 172 [2022-02-15 01:13:39,982 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 01:13:39,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:13:39,983 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:39,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 286 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2821 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:13:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 01:13:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-02-15 01:13:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 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 01:13:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-02-15 01:13:39,987 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2022-02-15 01:13:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:39,987 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-02-15 01:13:39,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 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 01:13:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-02-15 01:13:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:13:39,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:39,988 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:39,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:13:39,988 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:39,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1790750897, now seen corresponding path program 37 times [2022-02-15 01:13:39,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:39,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467369288] [2022-02-15 01:13:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:43,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:43,410 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:43,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:43,410 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:43,450 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:43,450 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:43,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:43,451 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:44,286 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:44,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467369288] [2022-02-15 01:13:44,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [467369288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:44,286 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:44,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:13:44,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257202306] [2022-02-15 01:13:44,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:44,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:13:44,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:44,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:13:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:13:44,288 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 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 01:13:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:45,866 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2022-02-15 01:13:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:13:45,867 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 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 89 [2022-02-15 01:13:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:45,867 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:13:45,867 INFO L226 Difference]: Without dead ends: 94 [2022-02-15 01:13:45,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:13:45,868 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2934 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:45,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 196 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2934 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:13:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-15 01:13:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-02-15 01:13:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 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 01:13:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-02-15 01:13:45,872 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2022-02-15 01:13:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:45,872 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-02-15 01:13:45,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 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 01:13:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-02-15 01:13:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 01:13:45,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:45,873 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:45,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:13:45,874 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash -668768433, now seen corresponding path program 38 times [2022-02-15 01:13:45,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:45,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947601576] [2022-02-15 01:13:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:50,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:50,635 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:50,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:50,635 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:50,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:50,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:50,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:50,679 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:51,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:51,533 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:51,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947601576] [2022-02-15 01:13:51,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [947601576] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:51,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:51,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 01:13:51,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66651168] [2022-02-15 01:13:51,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:51,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 01:13:51,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 01:13:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:13:51,534 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 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 01:13:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:53,079 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2022-02-15 01:13:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:13:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 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 91 [2022-02-15 01:13:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:53,080 INFO L225 Difference]: With dead ends: 180 [2022-02-15 01:13:53,080 INFO L226 Difference]: Without dead ends: 96 [2022-02-15 01:13:53,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:13:53,081 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3063 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:53,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 136 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3063 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:13:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-15 01:13:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-02-15 01:13:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 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 01:13:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-02-15 01:13:53,088 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2022-02-15 01:13:53,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:53,088 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-02-15 01:13:53,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 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 01:13:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-02-15 01:13:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:13:53,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:53,089 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:53,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:13:53,089 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2034831763, now seen corresponding path program 39 times [2022-02-15 01:13:53,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:53,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364996453] [2022-02-15 01:13:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:00,876 WARN L228 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 853 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:14:02,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:02,663 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:02,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:02,663 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:02,707 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:02,707 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:02,709 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:03,763 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:03,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364996453] [2022-02-15 01:14:03,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1364996453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:03,764 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:03,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 01:14:03,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887016649] [2022-02-15 01:14:03,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:03,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 01:14:03,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:03,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 01:14:03,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:14:03,765 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 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 01:14:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:05,694 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2022-02-15 01:14:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:14:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 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 93 [2022-02-15 01:14:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:05,695 INFO L225 Difference]: With dead ends: 184 [2022-02-15 01:14:05,695 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:14:05,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=1765, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:14:05,696 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 3328 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 3370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:05,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 406 Invalid, 3370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3328 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:14:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:14:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-02-15 01:14:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 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 01:14:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-02-15 01:14:05,700 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2022-02-15 01:14:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:05,700 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-02-15 01:14:05,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 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 01:14:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-02-15 01:14:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:14:05,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:05,701 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:05,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:14:05,701 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:05,701 INFO L85 PathProgramCache]: Analyzing trace with hash -561699317, now seen corresponding path program 40 times [2022-02-15 01:14:05,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:05,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920386853] [2022-02-15 01:14:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:09,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:09,318 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:09,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:09,318 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:09,373 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:09,373 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:09,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:09,375 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:10,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:10,383 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:10,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920386853] [2022-02-15 01:14:10,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [920386853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:10,384 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:10,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:14:10,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330830703] [2022-02-15 01:14:10,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:10,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:14:10,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:14:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:14:10,385 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 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 01:14:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:12,417 INFO L93 Difference]: Finished difference Result 188 states and 193 transitions. [2022-02-15 01:14:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:14:12,418 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 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 95 [2022-02-15 01:14:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:12,418 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:14:12,418 INFO L226 Difference]: Without dead ends: 100 [2022-02-15 01:14:12,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:14:12,419 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 3481 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 3524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:12,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 386 Invalid, 3524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3481 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 01:14:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-15 01:14:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-02-15 01:14:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 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 01:14:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-02-15 01:14:12,423 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2022-02-15 01:14:12,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:12,423 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-02-15 01:14:12,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 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 01:14:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-02-15 01:14:12,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-15 01:14:12,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:12,424 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:12,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:14:12,424 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2074340905, now seen corresponding path program 41 times [2022-02-15 01:14:12,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:12,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039806973] [2022-02-15 01:14:12,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:19,859 WARN L228 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 895 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:14:22,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:22,747 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:22,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:22,747 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:22,797 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:22,797 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:22,799 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:23,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:23,832 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:23,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039806973] [2022-02-15 01:14:23,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039806973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:23,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:23,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 01:14:23,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842210708] [2022-02-15 01:14:23,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:23,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 01:14:23,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 01:14:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:14:23,833 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 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 01:14:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:25,834 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2022-02-15 01:14:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:14:25,837 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 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 97 [2022-02-15 01:14:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:25,838 INFO L225 Difference]: With dead ends: 192 [2022-02-15 01:14:25,838 INFO L226 Difference]: Without dead ends: 102 [2022-02-15 01:14:25,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1937, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:14:25,839 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3574 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:25,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 206 Invalid, 3618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3574 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:14:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-15 01:14:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-02-15 01:14:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 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 01:14:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-02-15 01:14:25,845 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2022-02-15 01:14:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:25,845 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-02-15 01:14:25,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 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 01:14:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-02-15 01:14:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-15 01:14:25,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:25,845 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:25,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:14:25,846 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:25,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1278289607, now seen corresponding path program 42 times [2022-02-15 01:14:25,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:25,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221825391] [2022-02-15 01:14:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:34,986 WARN L228 SmtUtils]: Spent 9.13s on a formula simplification. DAG size of input: 916 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:14:36,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:36,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:36,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:36,438 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:36,496 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:36,496 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:36,497 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:37,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:37,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:37,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221825391] [2022-02-15 01:14:37,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [221825391] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:37,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:37,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 01:14:37,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305293545] [2022-02-15 01:14:37,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:37,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 01:14:37,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 01:14:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:14:37,522 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 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 01:14:39,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:39,738 INFO L93 Difference]: Finished difference Result 196 states and 201 transitions. [2022-02-15 01:14:39,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 01:14:39,739 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 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 99 [2022-02-15 01:14:39,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:39,739 INFO L225 Difference]: With dead ends: 196 [2022-02-15 01:14:39,739 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:14:39,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=2026, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:14:39,740 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 3771 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 3816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:39,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 276 Invalid, 3816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3771 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 01:14:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:14:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2022-02-15 01:14:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 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 01:14:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2022-02-15 01:14:39,744 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2022-02-15 01:14:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:39,744 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2022-02-15 01:14:39,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 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 01:14:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2022-02-15 01:14:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 01:14:39,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:39,745 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:39,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:14:39,745 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash 777170917, now seen corresponding path program 43 times [2022-02-15 01:14:39,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:39,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708052507] [2022-02-15 01:14:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:52,103 WARN L228 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 937 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:14:53,568 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:53,568 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:53,568 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:53,569 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:53,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:53,624 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:53,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:53,625 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:54,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:54,812 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:54,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708052507] [2022-02-15 01:14:54,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [708052507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:54,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:54,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:14:54,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576261446] [2022-02-15 01:14:54,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:54,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:14:54,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:14:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:14:54,814 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 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 01:14:57,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:57,188 INFO L93 Difference]: Finished difference Result 200 states and 205 transitions. [2022-02-15 01:14:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:14:57,188 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 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 101 [2022-02-15 01:14:57,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:57,189 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:14:57,189 INFO L226 Difference]: Without dead ends: 106 [2022-02-15 01:14:57,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:14:57,190 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3924 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:57,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 226 Invalid, 3970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3924 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 01:14:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-15 01:14:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-02-15 01:14:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.03) internal successors, (103), 100 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 01:14:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2022-02-15 01:14:57,194 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2022-02-15 01:14:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:57,194 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2022-02-15 01:14:57,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 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 01:14:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2022-02-15 01:14:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-15 01:14:57,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:57,195 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:57,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:14:57,195 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:57,195 INFO L85 PathProgramCache]: Analyzing trace with hash 238446979, now seen corresponding path program 44 times [2022-02-15 01:14:57,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:57,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766595693] [2022-02-15 01:14:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:02,342 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:02,343 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:02,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:02,343 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:02,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:02,414 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:02,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:02,416 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:03,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:03,772 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:03,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766595693] [2022-02-15 01:15:03,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [766595693] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:03,792 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:03,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 01:15:03,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906108078] [2022-02-15 01:15:03,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:03,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 01:15:03,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 01:15:03,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:15:03,793 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 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 01:15:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:06,217 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2022-02-15 01:15:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 01:15:06,218 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 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 103 [2022-02-15 01:15:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:06,218 INFO L225 Difference]: With dead ends: 204 [2022-02-15 01:15:06,218 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 01:15:06,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=2210, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:15:06,219 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 4129 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 4176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 4129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:06,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 296 Invalid, 4176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 4129 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 01:15:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 01:15:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-02-15 01:15:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 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 01:15:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2022-02-15 01:15:06,224 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2022-02-15 01:15:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:06,224 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2022-02-15 01:15:06,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 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 01:15:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2022-02-15 01:15:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-15 01:15:06,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:06,224 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:06,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:15:06,225 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:06,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2079181919, now seen corresponding path program 45 times [2022-02-15 01:15:06,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:06,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940941986] [2022-02-15 01:15:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:12,468 WARN L228 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 979 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:15:14,212 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:14,212 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:14,212 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:14,212 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:14,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:14,267 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:14,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:14,269 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:15,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:15,540 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:15,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940941986] [2022-02-15 01:15:15,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [940941986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:15,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:15,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-15 01:15:15,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688809434] [2022-02-15 01:15:15,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:15,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-15 01:15:15,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-15 01:15:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:15:15,542 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 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 01:15:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:18,116 INFO L93 Difference]: Finished difference Result 208 states and 213 transitions. [2022-02-15 01:15:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:15:18,117 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 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 105 [2022-02-15 01:15:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:18,117 INFO L225 Difference]: With dead ends: 208 [2022-02-15 01:15:18,117 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:15:18,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:15:18,118 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4226 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 4274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:18,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 86 Invalid, 4274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 4226 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 01:15:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:15:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-02-15 01:15:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 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 01:15:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-02-15 01:15:18,122 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2022-02-15 01:15:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:18,123 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-02-15 01:15:18,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 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 01:15:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-02-15 01:15:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-15 01:15:18,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:18,123 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:18,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:15:18,123 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash -232526273, now seen corresponding path program 46 times [2022-02-15 01:15:18,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:18,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791651610] [2022-02-15 01:15:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:36,289 WARN L228 SmtUtils]: Spent 18.16s on a formula simplification. DAG size of input: 1000 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:15:38,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:38,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:38,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:38,367 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:38,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:38,448 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:38,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:38,450 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:39,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:39,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:39,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791651610] [2022-02-15 01:15:39,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [791651610] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:39,696 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:39,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:15:39,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901970334] [2022-02-15 01:15:39,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:39,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:15:39,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:39,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:15:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:15:39,697 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 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 01:15:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:42,335 INFO L93 Difference]: Finished difference Result 212 states and 217 transitions. [2022-02-15 01:15:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:15:42,335 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 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 107 [2022-02-15 01:15:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:42,336 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:15:42,336 INFO L226 Difference]: Without dead ends: 112 [2022-02-15 01:15:42,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:15:42,337 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 4440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:42,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 36 Invalid, 4440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4391 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 01:15:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-15 01:15:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2022-02-15 01:15:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 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 01:15:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-02-15 01:15:42,341 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2022-02-15 01:15:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:42,341 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-02-15 01:15:42,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 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 01:15:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-02-15 01:15:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-15 01:15:42,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:42,342 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:42,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:15:42,342 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:42,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:42,342 INFO L85 PathProgramCache]: Analyzing trace with hash 582056285, now seen corresponding path program 47 times [2022-02-15 01:15:42,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:42,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645767215] [2022-02-15 01:15:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:01,624 WARN L228 SmtUtils]: Spent 19.28s on a formula simplification. DAG size of input: 1021 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:16:03,258 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:03,258 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:03,258 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:03,258 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:03,328 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:03,328 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:03,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:03,331 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:04,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:04,609 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:04,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645767215] [2022-02-15 01:16:04,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645767215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:04,609 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:04,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-15 01:16:04,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679449017] [2022-02-15 01:16:04,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:04,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-15 01:16:04,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:04,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-15 01:16:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:16:04,610 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 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 01:16:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:07,356 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2022-02-15 01:16:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 01:16:07,356 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 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 109 [2022-02-15 01:16:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:07,357 INFO L225 Difference]: With dead ends: 216 [2022-02-15 01:16:07,357 INFO L226 Difference]: Without dead ends: 114 [2022-02-15 01:16:07,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=2501, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:16:07,358 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4616 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 4666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:07,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 126 Invalid, 4666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4616 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 01:16:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-15 01:16:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2022-02-15 01:16:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 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 01:16:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-02-15 01:16:07,362 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2022-02-15 01:16:07,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:07,362 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-02-15 01:16:07,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 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 01:16:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-02-15 01:16:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-15 01:16:07,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:07,363 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:07,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:16:07,363 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1711846651, now seen corresponding path program 48 times [2022-02-15 01:16:07,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:07,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563466564] [2022-02-15 01:16:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:13,182 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:13,182 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:13,182 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:13,182 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:13,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:13,261 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:13,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:13,265 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:14,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:14,681 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:14,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563466564] [2022-02-15 01:16:14,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563466564] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:14,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:14,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 01:16:14,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928731313] [2022-02-15 01:16:14,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:14,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 01:16:14,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:14,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 01:16:14,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:16:14,683 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 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 01:16:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:17,751 INFO L93 Difference]: Finished difference Result 220 states and 225 transitions. [2022-02-15 01:16:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:16:17,751 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 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 111 [2022-02-15 01:16:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:17,752 INFO L225 Difference]: With dead ends: 220 [2022-02-15 01:16:17,752 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 01:16:17,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:16:17,753 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 4781 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:17,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 56 Invalid, 4832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 4781 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 01:16:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 01:16:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-02-15 01:16:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 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 01:16:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2022-02-15 01:16:17,757 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2022-02-15 01:16:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:17,757 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2022-02-15 01:16:17,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 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 01:16:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2022-02-15 01:16:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-15 01:16:17,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:17,758 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:17,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:16:17,758 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash 813662489, now seen corresponding path program 49 times [2022-02-15 01:16:17,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:17,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136817355] [2022-02-15 01:16:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:25,970 WARN L228 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 1063 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:16:27,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:27,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:27,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:27,675 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:27,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:27,750 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:27,752 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:29,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:29,285 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:29,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136817355] [2022-02-15 01:16:29,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1136817355] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:29,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:29,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:16:29,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072865671] [2022-02-15 01:16:29,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:29,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:16:29,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:16:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:16:29,286 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 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 01:16:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:32,606 INFO L93 Difference]: Finished difference Result 224 states and 229 transitions. [2022-02-15 01:16:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:16:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 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 113 [2022-02-15 01:16:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:32,608 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:16:32,608 INFO L226 Difference]: Without dead ends: 118 [2022-02-15 01:16:32,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:16:32,609 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5030 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 5082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:32,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 186 Invalid, 5082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5030 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 01:16:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-15 01:16:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-02-15 01:16:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 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 01:16:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-02-15 01:16:32,613 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2022-02-15 01:16:32,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:32,613 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-02-15 01:16:32,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 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 01:16:32,613 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-02-15 01:16:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-02-15 01:16:32,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:32,614 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:32,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:16:32,614 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:32,614 INFO L85 PathProgramCache]: Analyzing trace with hash 947109303, now seen corresponding path program 50 times [2022-02-15 01:16:32,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:32,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106894079] [2022-02-15 01:16:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:39,372 WARN L228 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 1084 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:16:40,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:40,940 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:40,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:40,940 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:41,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:41,031 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:41,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:41,034 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:42,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:42,233 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:42,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106894079] [2022-02-15 01:16:42,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2106894079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:42,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:42,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 01:16:42,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726916640] [2022-02-15 01:16:42,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:42,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 01:16:42,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:42,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 01:16:42,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:16:42,235 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 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 01:16:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:45,544 INFO L93 Difference]: Finished difference Result 228 states and 233 transitions. [2022-02-15 01:16:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 01:16:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 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 115 [2022-02-15 01:16:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:45,545 INFO L225 Difference]: With dead ends: 228 [2022-02-15 01:16:45,545 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 01:16:45,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=2810, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:16:45,546 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 5303 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 5356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 5303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:45,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 366 Invalid, 5356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 5303 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 01:16:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 01:16:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-02-15 01:16:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 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 01:16:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-02-15 01:16:45,550 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2022-02-15 01:16:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:45,550 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-02-15 01:16:45,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 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 01:16:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-02-15 01:16:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-15 01:16:45,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:45,551 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:45,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:16:45,552 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 340478677, now seen corresponding path program 51 times [2022-02-15 01:16:45,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:45,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817591269] [2022-02-15 01:16:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:49,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:49,502 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:49,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:49,502 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:49,587 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:49,587 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:49,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:49,589 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:51,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:51,163 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 01:16:51,163 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:51,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817591269] [2022-02-15 01:16:51,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817591269] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:51,163 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:51,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-15 01:16:51,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983626930] [2022-02-15 01:16:51,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:51,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 01:16:51,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:51,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 01:16:51,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:16:51,165 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 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 01:16:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:54,624 INFO L93 Difference]: Finished difference Result 232 states and 237 transitions. [2022-02-15 01:16:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 01:16:54,624 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 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 117 [2022-02-15 01:16:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:54,625 INFO L225 Difference]: With dead ends: 232 [2022-02-15 01:16:54,625 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:16:54,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=2917, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:16:54,626 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5388 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 5388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:54,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 66 Invalid, 5442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 5388 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 01:16:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:16:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-02-15 01:16:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 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 01:16:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-02-15 01:16:54,630 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2022-02-15 01:16:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:54,631 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-02-15 01:16:54,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 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 01:16:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-02-15 01:16:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-15 01:16:54,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:54,631 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:54,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:16:54,631 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:54,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1483999347, now seen corresponding path program 52 times [2022-02-15 01:16:54,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:54,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010784249] [2022-02-15 01:16:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:01,757 WARN L228 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 1126 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:17:03,872 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:03,873 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:03,873 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:03,873 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:03,952 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:03,952 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:03,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:03,954 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:05,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:05,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:05,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010784249] [2022-02-15 01:17:05,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010784249] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:05,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:05,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:17:05,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471182386] [2022-02-15 01:17:05,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:05,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:17:05,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:17:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:17:05,648 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 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 01:17:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:08,967 INFO L93 Difference]: Finished difference Result 236 states and 241 transitions. [2022-02-15 01:17:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:17:08,967 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 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 119 [2022-02-15 01:17:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:08,968 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:17:08,968 INFO L226 Difference]: Without dead ends: 124 [2022-02-15 01:17:08,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:17:08,968 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 5705 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 5760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:08,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 336 Invalid, 5760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5705 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 01:17:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-15 01:17:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-02-15 01:17:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 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 01:17:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2022-02-15 01:17:08,973 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2022-02-15 01:17:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:08,973 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2022-02-15 01:17:08,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 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 01:17:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2022-02-15 01:17:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-15 01:17:08,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:08,974 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:08,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:17:08,974 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash 895735441, now seen corresponding path program 53 times [2022-02-15 01:17:08,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:08,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408275840] [2022-02-15 01:17:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:17,314 WARN L228 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 1147 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:17:19,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:19,288 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:19,288 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:19,288 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:19,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:19,370 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:19,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:19,400 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:21,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:21,146 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:21,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408275840] [2022-02-15 01:17:21,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [408275840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:21,146 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:21,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-15 01:17:21,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143784817] [2022-02-15 01:17:21,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:21,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-15 01:17:21,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-15 01:17:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:17:21,147 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 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 01:17:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:25,222 INFO L93 Difference]: Finished difference Result 240 states and 245 transitions. [2022-02-15 01:17:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 01:17:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 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 121 [2022-02-15 01:17:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:25,223 INFO L225 Difference]: With dead ends: 240 [2022-02-15 01:17:25,223 INFO L226 Difference]: Without dead ends: 126 [2022-02-15 01:17:25,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=3137, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:17:25,224 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 5958 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 6014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 5958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:25,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 436 Invalid, 6014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 5958 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 01:17:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-15 01:17:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2022-02-15 01:17:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 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 01:17:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-02-15 01:17:25,229 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 121 [2022-02-15 01:17:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:25,229 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-02-15 01:17:25,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 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 01:17:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-02-15 01:17:25,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-02-15 01:17:25,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:25,230 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:25,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:17:25,230 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:25,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:25,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1785162449, now seen corresponding path program 54 times [2022-02-15 01:17:25,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:25,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525496664] [2022-02-15 01:17:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:31,064 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:31,065 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:31,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:31,065 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:31,167 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:31,167 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:31,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:31,172 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:33,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:33,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:33,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525496664] [2022-02-15 01:17:33,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1525496664] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:33,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:33,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-15 01:17:33,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130925661] [2022-02-15 01:17:33,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:33,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 01:17:33,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 01:17:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:17:33,051 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 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 01:17:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:37,711 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2022-02-15 01:17:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 01:17:37,711 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 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 123 [2022-02-15 01:17:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:37,712 INFO L225 Difference]: With dead ends: 244 [2022-02-15 01:17:37,712 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:17:37,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=172, Invalid=3250, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:17:37,712 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 6227 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 6284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 6227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:37,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 566 Invalid, 6284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 6227 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-15 01:17:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:17:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-02-15 01:17:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 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 01:17:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2022-02-15 01:17:37,717 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 123 [2022-02-15 01:17:37,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:37,717 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2022-02-15 01:17:37,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 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 01:17:37,717 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2022-02-15 01:17:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-15 01:17:37,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:37,718 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:37,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:17:37,718 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:37,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:37,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1147657139, now seen corresponding path program 55 times [2022-02-15 01:17:37,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:37,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478853768] [2022-02-15 01:17:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:48,629 WARN L228 SmtUtils]: Spent 10.89s on a formula simplification. DAG size of input: 1189 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:17:51,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:51,073 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:51,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:51,073 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:51,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:51,179 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:51,182 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:53,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:53,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:53,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478853768] [2022-02-15 01:17:53,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1478853768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:53,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:53,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:17:53,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94065581] [2022-02-15 01:17:53,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:53,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:17:53,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:53,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:17:53,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:17:53,077 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 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 01:17:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:57,541 INFO L93 Difference]: Finished difference Result 248 states and 253 transitions. [2022-02-15 01:17:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:17:57,542 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 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 125 [2022-02-15 01:17:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:57,542 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:17:57,542 INFO L226 Difference]: Without dead ends: 130 [2022-02-15 01:17:57,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:17:57,543 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6264 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 6322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 6264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:57,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 106 Invalid, 6322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 6264 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-15 01:17:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-15 01:17:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2022-02-15 01:17:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 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 01:17:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-02-15 01:17:57,548 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2022-02-15 01:17:57,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:57,548 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-02-15 01:17:57,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 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 01:17:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-02-15 01:17:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-15 01:17:57,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:57,549 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:57,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:17:57,549 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:57,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1609589739, now seen corresponding path program 56 times [2022-02-15 01:17:57,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:57,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503655418] [2022-02-15 01:17:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:08,928 WARN L228 SmtUtils]: Spent 11.36s on a formula simplification. DAG size of input: 1210 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:18:11,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:11,155 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:11,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:11,155 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:11,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:11,280 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:11,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:11,283 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:13,250 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:13,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503655418] [2022-02-15 01:18:13,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [503655418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:13,250 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:13,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-15 01:18:13,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731623858] [2022-02-15 01:18:13,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:13,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 01:18:13,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 01:18:13,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:18:13,251 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 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 01:18:17,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:17,870 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2022-02-15 01:18:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 01:18:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 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 127 [2022-02-15 01:18:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:17,871 INFO L225 Difference]: With dead ends: 252 [2022-02-15 01:18:17,871 INFO L226 Difference]: Without dead ends: 132 [2022-02-15 01:18:17,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=178, Invalid=3482, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:18:17,872 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 6465 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 6524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 6465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:17,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 46 Invalid, 6524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 6465 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-15 01:18:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-15 01:18:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-02-15 01:18:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 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 01:18:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-02-15 01:18:17,877 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 127 [2022-02-15 01:18:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:17,877 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-02-15 01:18:17,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 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 01:18:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-02-15 01:18:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-15 01:18:17,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:17,878 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:17,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:18:17,878 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:17,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1329017865, now seen corresponding path program 57 times [2022-02-15 01:18:17,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:17,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592992188] [2022-02-15 01:18:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:29,023 WARN L228 SmtUtils]: Spent 11.14s on a formula simplification. DAG size of input: 1231 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:18:30,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:30,907 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:30,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:30,907 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:30,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:30,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:30,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:30,993 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:33,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:33,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:33,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592992188] [2022-02-15 01:18:33,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592992188] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:33,139 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:33,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-15 01:18:33,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449084720] [2022-02-15 01:18:33,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:33,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-15 01:18:33,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:33,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-15 01:18:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:18:33,141 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 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 01:18:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:38,134 INFO L93 Difference]: Finished difference Result 256 states and 261 transitions. [2022-02-15 01:18:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 01:18:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 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 129 [2022-02-15 01:18:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:38,135 INFO L225 Difference]: With dead ends: 256 [2022-02-15 01:18:38,135 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:18:38,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=181, Invalid=3601, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:18:38,136 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 6750 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 6810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 6750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:38,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 186 Invalid, 6810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 6750 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-15 01:18:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:18:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2022-02-15 01:18:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 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 01:18:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-02-15 01:18:38,141 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 129 [2022-02-15 01:18:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:38,141 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-02-15 01:18:38,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 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 01:18:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-02-15 01:18:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-02-15 01:18:38,141 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:38,142 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:38,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:18:38,142 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:38,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2012580697, now seen corresponding path program 58 times [2022-02-15 01:18:38,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:38,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463359043] [2022-02-15 01:18:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:08,139 WARN L228 SmtUtils]: Spent 29.99s on a formula simplification. DAG size of input: 1252 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:19:10,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:10,355 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:10,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:10,355 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:10,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:10,440 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:10,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:10,442 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:12,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:12,064 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:12,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463359043] [2022-02-15 01:19:12,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [463359043] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:12,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:12,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:19:12,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070496355] [2022-02-15 01:19:12,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:12,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:19:12,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:19:12,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:19:12,066 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 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 01:19:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:16,303 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2022-02-15 01:19:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:19:16,304 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 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 131 [2022-02-15 01:19:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:16,304 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:19:16,304 INFO L226 Difference]: Without dead ends: 136 [2022-02-15 01:19:16,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:19:16,305 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6999 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 7060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 6999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:16,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 226 Invalid, 7060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 6999 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-15 01:19:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-15 01:19:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2022-02-15 01:19:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 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 01:19:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-02-15 01:19:16,310 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 131 [2022-02-15 01:19:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:16,310 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-02-15 01:19:16,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 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 01:19:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-02-15 01:19:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-15 01:19:16,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:16,311 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:16,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:19:16,311 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:16,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash -653261371, now seen corresponding path program 59 times [2022-02-15 01:19:16,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:16,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381980463] [2022-02-15 01:19:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:23,719 WARN L228 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 1273 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:19:26,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:26,184 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:26,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:26,184 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:26,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:26,278 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:26,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:26,282 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:28,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:28,378 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:28,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381980463] [2022-02-15 01:19:28,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [381980463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:28,378 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:28,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-15 01:19:28,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661501874] [2022-02-15 01:19:28,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:28,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-15 01:19:28,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-15 01:19:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:19:28,379 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 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 01:19:33,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:33,545 INFO L93 Difference]: Finished difference Result 264 states and 269 transitions. [2022-02-15 01:19:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 01:19:33,546 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 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 133 [2022-02-15 01:19:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:33,547 INFO L225 Difference]: With dead ends: 264 [2022-02-15 01:19:33,547 INFO L226 Difference]: Without dead ends: 138 [2022-02-15 01:19:33,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=3845, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:19:33,547 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 7272 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 7334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 7272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:33,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 316 Invalid, 7334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 7272 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-02-15 01:19:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-15 01:19:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-02-15 01:19:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 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 01:19:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-02-15 01:19:33,552 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 133 [2022-02-15 01:19:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:33,552 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-02-15 01:19:33,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 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 01:19:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-02-15 01:19:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-15 01:19:33,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:33,553 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:33,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:19:33,553 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash -17447069, now seen corresponding path program 60 times [2022-02-15 01:19:33,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:33,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29414406] [2022-02-15 01:19:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:49,194 WARN L228 SmtUtils]: Spent 15.63s on a formula simplification. DAG size of input: 1294 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:19:50,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:50,762 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:50,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:50,762 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:50,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:50,901 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:50,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:50,904 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:52,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:52,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:52,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29414406] [2022-02-15 01:19:52,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [29414406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:52,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:52,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-15 01:19:52,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602518923] [2022-02-15 01:19:52,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:52,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-15 01:19:52,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-15 01:19:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:19:52,922 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 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 01:19:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:58,594 INFO L93 Difference]: Finished difference Result 268 states and 273 transitions. [2022-02-15 01:19:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 01:19:58,594 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 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 135 [2022-02-15 01:19:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:58,595 INFO L225 Difference]: With dead ends: 268 [2022-02-15 01:19:58,595 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:19:58,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=190, Invalid=3970, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:19:58,596 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 7425 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 7488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 7425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:58,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 96 Invalid, 7488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 7425 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-02-15 01:19:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:19:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-02-15 01:19:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 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 01:19:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2022-02-15 01:19:58,604 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 135 [2022-02-15 01:19:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:58,604 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2022-02-15 01:19:58,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 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 01:19:58,604 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2022-02-15 01:19:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-15 01:19:58,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:58,605 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:58,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:19:58,605 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:58,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1114741121, now seen corresponding path program 61 times [2022-02-15 01:19:58,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:58,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91395798] [2022-02-15 01:19:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:05,626 WARN L228 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 1315 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:20:07,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:07,589 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:07,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:07,589 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:07,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:07,686 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:07,689 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:10,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:10,011 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:10,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91395798] [2022-02-15 01:20:10,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [91395798] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:10,012 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:10,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:20:10,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212492753] [2022-02-15 01:20:10,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:10,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:20:10,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:20:10,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:20:10,013 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 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 01:20:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:15,424 INFO L93 Difference]: Finished difference Result 272 states and 277 transitions. [2022-02-15 01:20:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:20:15,424 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 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 137 [2022-02-15 01:20:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:15,425 INFO L225 Difference]: With dead ends: 272 [2022-02-15 01:20:15,425 INFO L226 Difference]: Without dead ends: 142 [2022-02-15 01:20:15,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:20:15,426 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 7734 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 7798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 7734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:15,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 256 Invalid, 7798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 7734 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-02-15 01:20:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-15 01:20:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-02-15 01:20:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 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 01:20:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-02-15 01:20:15,431 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2022-02-15 01:20:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:15,431 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-02-15 01:20:15,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 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 01:20:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-02-15 01:20:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-15 01:20:15,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:15,432 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:15,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:20:15,432 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101473, now seen corresponding path program 62 times [2022-02-15 01:20:15,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:15,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853041166] [2022-02-15 01:20:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:32,546 WARN L228 SmtUtils]: Spent 17.10s on a formula simplification. DAG size of input: 1336 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:20:34,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:34,344 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:34,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:34,344 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:34,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:34,469 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:34,471 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:36,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:36,282 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:36,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853041166] [2022-02-15 01:20:36,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [853041166] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:36,282 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:36,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-15 01:20:36,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214122543] [2022-02-15 01:20:36,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:36,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-15 01:20:36,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:36,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-15 01:20:36,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:20:36,283 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 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 01:20:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:41,605 INFO L93 Difference]: Finished difference Result 276 states and 281 transitions. [2022-02-15 01:20:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 01:20:41,605 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 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 139 [2022-02-15 01:20:41,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:41,612 INFO L225 Difference]: With dead ends: 276 [2022-02-15 01:20:41,612 INFO L226 Difference]: Without dead ends: 144 [2022-02-15 01:20:41,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=196, Invalid=4226, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:20:41,632 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 7975 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 8040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 7975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:41,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 236 Invalid, 8040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 7975 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-02-15 01:20:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-15 01:20:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2022-02-15 01:20:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 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 01:20:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-02-15 01:20:41,637 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 139 [2022-02-15 01:20:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:41,637 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-02-15 01:20:41,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 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 01:20:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-02-15 01:20:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-15 01:20:41,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:41,638 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:41,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:20:41,638 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash 892006205, now seen corresponding path program 63 times [2022-02-15 01:20:41,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:41,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008026821] [2022-02-15 01:20:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:57,162 WARN L228 SmtUtils]: Spent 15.52s on a formula simplification. DAG size of input: 1357 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:20:59,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:59,228 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:59,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:59,228 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:59,352 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:59,352 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:59,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:59,355 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:01,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:01,313 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:01,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008026821] [2022-02-15 01:21:01,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2008026821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:01,313 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:01,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-15 01:21:01,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256579960] [2022-02-15 01:21:01,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:01,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-15 01:21:01,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-15 01:21:01,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:21:01,314 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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 01:21:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:07,506 INFO L93 Difference]: Finished difference Result 280 states and 285 transitions. [2022-02-15 01:21:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 01:21:07,506 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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 141 [2022-02-15 01:21:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:07,507 INFO L225 Difference]: With dead ends: 280 [2022-02-15 01:21:07,507 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:21:07,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=199, Invalid=4357, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:21:07,507 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 8188 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 8254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 8188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:07,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 136 Invalid, 8254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 8188 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-15 01:21:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:21:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-02-15 01:21:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 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 01:21:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2022-02-15 01:21:07,513 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 141 [2022-02-15 01:21:07,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:07,513 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2022-02-15 01:21:07,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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 01:21:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2022-02-15 01:21:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-15 01:21:07,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:07,513 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:07,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:21:07,514 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:07,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1073990949, now seen corresponding path program 64 times [2022-02-15 01:21:07,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:07,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53499257] [2022-02-15 01:21:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:18,640 WARN L228 SmtUtils]: Spent 11.12s on a formula simplification. DAG size of input: 1378 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:21:20,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:20,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:20,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:20,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:20,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:20,790 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:20,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:20,793 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:21:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:23,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:23,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:23,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53499257] [2022-02-15 01:21:23,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [53499257] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:23,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:23,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:21:23,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834530545] [2022-02-15 01:21:23,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:23,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:21:23,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:23,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:21:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:21:23,429 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 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 01:21:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:30,384 INFO L93 Difference]: Finished difference Result 284 states and 289 transitions. [2022-02-15 01:21:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:21:30,384 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 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 143 [2022-02-15 01:21:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:30,385 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:21:30,385 INFO L226 Difference]: Without dead ends: 148 [2022-02-15 01:21:30,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:21:30,386 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 8609 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 8676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 8609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:30,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 546 Invalid, 8676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 8609 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-02-15 01:21:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-15 01:21:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2022-02-15 01:21:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 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 01:21:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2022-02-15 01:21:30,402 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 143 [2022-02-15 01:21:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:30,402 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2022-02-15 01:21:30,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 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 01:21:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2022-02-15 01:21:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-15 01:21:30,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:30,403 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:30,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:21:30,403 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:30,403 INFO L85 PathProgramCache]: Analyzing trace with hash -611645703, now seen corresponding path program 65 times [2022-02-15 01:21:30,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:30,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586897992] [2022-02-15 01:21:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:42,742 WARN L228 SmtUtils]: Spent 12.33s on a formula simplification. DAG size of input: 1399 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:21:44,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:44,879 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:44,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:44,879 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:44,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:44,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:44,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:44,993 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:21:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:47,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:47,375 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:47,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586897992] [2022-02-15 01:21:47,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [586897992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:47,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:47,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-15 01:21:47,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22552858] [2022-02-15 01:21:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:47,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-15 01:21:47,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-15 01:21:47,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:21:47,376 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 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 01:21:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:53,709 INFO L93 Difference]: Finished difference Result 288 states and 293 transitions. [2022-02-15 01:21:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 01:21:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 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 145 [2022-02-15 01:21:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:53,710 INFO L225 Difference]: With dead ends: 288 [2022-02-15 01:21:53,710 INFO L226 Difference]: Without dead ends: 150 [2022-02-15 01:21:53,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:21:53,711 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 8898 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 8966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 8898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:53,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 616 Invalid, 8966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 8898 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-15 01:21:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-15 01:21:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-02-15 01:21:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 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 01:21:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-02-15 01:21:53,716 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 145 [2022-02-15 01:21:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:53,716 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-02-15 01:21:53,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 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 01:21:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-02-15 01:21:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-02-15 01:21:53,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:53,717 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:53,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:21:53,717 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1320504215, now seen corresponding path program 66 times [2022-02-15 01:21:53,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:53,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052411255] [2022-02-15 01:21:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:05,204 WARN L228 SmtUtils]: Spent 11.47s on a formula simplification. DAG size of input: 1420 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:22:07,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:07,169 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:07,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:07,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:07,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:07,278 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:07,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:07,281 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:10,596 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:10,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052411255] [2022-02-15 01:22:10,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1052411255] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:10,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:10,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 01:22:10,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606577695] [2022-02-15 01:22:10,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:10,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 01:22:10,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 01:22:10,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:22:10,597 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 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 01:22:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:17,315 INFO L93 Difference]: Finished difference Result 292 states and 297 transitions. [2022-02-15 01:22:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 01:22:17,315 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 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 147 [2022-02-15 01:22:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:17,316 INFO L225 Difference]: With dead ends: 292 [2022-02-15 01:22:17,316 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:22:17,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=208, Invalid=4762, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:22:17,316 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 9039 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 9108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 9039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:17,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 306 Invalid, 9108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 9039 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-02-15 01:22:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:22:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2022-02-15 01:22:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 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 01:22:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2022-02-15 01:22:17,321 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 147 [2022-02-15 01:22:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:17,321 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2022-02-15 01:22:17,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 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 01:22:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2022-02-15 01:22:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-15 01:22:17,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:17,322 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:17,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:22:17,322 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1604263755, now seen corresponding path program 67 times [2022-02-15 01:22:17,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:17,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161908812] [2022-02-15 01:22:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:25,404 WARN L228 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 1441 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:22:27,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:27,701 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:27,701 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:27,701 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:27,839 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:27,839 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:27,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:27,842 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:30,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:30,224 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:30,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161908812] [2022-02-15 01:22:30,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1161908812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:30,225 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:30,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:22:30,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886270658] [2022-02-15 01:22:30,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:30,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:22:30,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:22:30,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:22:30,234 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 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 01:22:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:37,659 INFO L93 Difference]: Finished difference Result 296 states and 301 transitions. [2022-02-15 01:22:37,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:22:37,660 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 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 149 [2022-02-15 01:22:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:37,660 INFO L225 Difference]: With dead ends: 296 [2022-02-15 01:22:37,660 INFO L226 Difference]: Without dead ends: 154 [2022-02-15 01:22:37,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:22:37,661 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 9304 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 9374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 9304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:37,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 296 Invalid, 9374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 9304 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-02-15 01:22:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-15 01:22:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2022-02-15 01:22:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 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 01:22:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2022-02-15 01:22:37,666 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 149 [2022-02-15 01:22:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:37,666 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2022-02-15 01:22:37,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 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 01:22:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2022-02-15 01:22:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-02-15 01:22:37,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:37,668 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:37,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:22:37,668 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash 897295955, now seen corresponding path program 68 times [2022-02-15 01:22:37,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:37,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190212967] [2022-02-15 01:22:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:49,734 WARN L228 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 1462 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:22:52,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:52,689 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:52,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:52,689 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:52,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:52,814 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:52,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:52,817 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:55,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:55,045 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:55,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190212967] [2022-02-15 01:22:55,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [190212967] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:55,045 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:55,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-15 01:22:55,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082700665] [2022-02-15 01:22:55,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:55,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-15 01:22:55,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:55,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-15 01:22:55,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:22:55,047 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 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 01:23:02,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:02,627 INFO L93 Difference]: Finished difference Result 300 states and 305 transitions. [2022-02-15 01:23:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 01:23:02,627 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 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 151 [2022-02-15 01:23:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:02,636 INFO L225 Difference]: With dead ends: 300 [2022-02-15 01:23:02,636 INFO L226 Difference]: Without dead ends: 156 [2022-02-15 01:23:02,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=214, Invalid=5042, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:23:02,637 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 71 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 9485 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 9556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 9485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:02,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 66 Invalid, 9556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 9485 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-02-15 01:23:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-15 01:23:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2022-02-15 01:23:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 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 01:23:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2022-02-15 01:23:02,650 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 151 [2022-02-15 01:23:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:02,650 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2022-02-15 01:23:02,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 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 01:23:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2022-02-15 01:23:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-02-15 01:23:02,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:02,651 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:02,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:23:02,651 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash -285508495, now seen corresponding path program 69 times [2022-02-15 01:23:02,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:02,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104868717] [2022-02-15 01:23:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:09,979 WARN L228 SmtUtils]: Spent 7.32s on a formula simplification. DAG size of input: 1483 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:23:12,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:12,847 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:12,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:12,847 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:12,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:12,991 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:12,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:12,994 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:17,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:17,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:17,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104868717] [2022-02-15 01:23:17,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [104868717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:17,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:17,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-15 01:23:17,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135845333] [2022-02-15 01:23:17,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:17,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-15 01:23:17,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-15 01:23:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:23:17,048 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 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 01:23:25,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:25,896 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2022-02-15 01:23:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 01:23:25,896 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 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 153 [2022-02-15 01:23:25,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:25,897 INFO L225 Difference]: With dead ends: 304 [2022-02-15 01:23:25,897 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:23:25,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=217, Invalid=5185, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:23:25,898 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 9990 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 10062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 9990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:25,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 636 Invalid, 10062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 9990 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-02-15 01:23:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:23:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2022-02-15 01:23:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 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 01:23:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-02-15 01:23:25,914 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 153 [2022-02-15 01:23:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:25,914 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-02-15 01:23:25,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 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 01:23:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-02-15 01:23:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-15 01:23:25,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:25,915 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:25,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:23:25,915 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1205748495, now seen corresponding path program 70 times [2022-02-15 01:23:25,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:25,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7188254] [2022-02-15 01:23:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:38,176 WARN L228 SmtUtils]: Spent 12.25s on a formula simplification. DAG size of input: 1504 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:23:41,511 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:41,511 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:41,511 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:41,511 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:41,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:41,653 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:41,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:41,656 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:45,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:45,149 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:45,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7188254] [2022-02-15 01:23:45,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [7188254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:45,150 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:45,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:23:45,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901296359] [2022-02-15 01:23:45,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:45,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:23:45,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:45,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:23:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:23:45,151 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 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 01:23:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:54,799 INFO L93 Difference]: Finished difference Result 308 states and 313 transitions. [2022-02-15 01:23:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:23:54,800 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 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 155 [2022-02-15 01:23:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:54,800 INFO L225 Difference]: With dead ends: 308 [2022-02-15 01:23:54,800 INFO L226 Difference]: Without dead ends: 160 [2022-02-15 01:23:54,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:23:54,801 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 10191 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 10264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 10191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:54,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 436 Invalid, 10264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 10191 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-02-15 01:23:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-15 01:23:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2022-02-15 01:23:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 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 01:23:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2022-02-15 01:23:54,806 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2022-02-15 01:23:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:54,807 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2022-02-15 01:23:54,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 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 01:23:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2022-02-15 01:23:54,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-15 01:23:54,807 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:54,807 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:54,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:23:54,808 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash -215360979, now seen corresponding path program 71 times [2022-02-15 01:23:54,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:54,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657797395] [2022-02-15 01:23:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:24:26,616 WARN L228 SmtUtils]: Spent 31.80s on a formula simplification. DAG size of input: 1525 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:24:30,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:24:30,138 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:24:30,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:24:30,138 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:24:30,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:24:30,295 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:24:30,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:24:30,299 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:24:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:33,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:24:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:24:33,646 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:24:33,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657797395] [2022-02-15 01:24:33,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [657797395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:24:33,646 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:24:33,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-15 01:24:33,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017351026] [2022-02-15 01:24:33,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:24:33,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-15 01:24:33,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:24:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-15 01:24:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:24:33,648 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 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 01:24:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:24:42,593 INFO L93 Difference]: Finished difference Result 312 states and 317 transitions. [2022-02-15 01:24:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 01:24:42,594 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 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 157 [2022-02-15 01:24:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:24:42,594 INFO L225 Difference]: With dead ends: 312 [2022-02-15 01:24:42,594 INFO L226 Difference]: Without dead ends: 162 [2022-02-15 01:24:42,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=223, Invalid=5477, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:24:42,595 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 10400 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 10474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 10400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:24:42,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 246 Invalid, 10474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 10400 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-02-15 01:24:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-15 01:24:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2022-02-15 01:24:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 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 01:24:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-02-15 01:24:42,601 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 157 [2022-02-15 01:24:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:24:42,601 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-02-15 01:24:42,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 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 01:24:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-02-15 01:24:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-02-15 01:24:42,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:24:42,602 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:24:42,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:24:42,602 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:24:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:24:42,602 INFO L85 PathProgramCache]: Analyzing trace with hash -101965365, now seen corresponding path program 72 times [2022-02-15 01:24:42,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:24:42,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406816922] [2022-02-15 01:24:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:52,315 WARN L228 SmtUtils]: Spent 1.16m on a formula simplification. DAG size of input: 1546 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 01:25:54,883 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:54,883 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:54,883 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:54,883 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:55,022 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 5 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:55,022 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:55,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:55,025 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:58,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:25:58,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:58,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406816922] [2022-02-15 01:25:58,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [406816922] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:58,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:58,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 01:25:58,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237055319] [2022-02-15 01:25:58,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:58,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 01:25:58,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:58,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 01:25:58,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:25:58,819 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 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)