/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/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:41:23,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:41:23,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:41:23,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:41:23,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:41:23,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:41:23,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:41:23,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 20:41:23,922 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:41:23,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:41:23,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:41:23,923 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:41:23,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:41:23,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:41:23,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:41:23,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:41:23,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:41:23,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:41:23,924 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:41:23,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:41:23,924 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:41:23,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:41:23,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:41:23,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:41:23,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:41:23,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:41:23,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:41:23,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:41:23,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:41:23,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:41:23,926 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:41:23,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:41:24,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:41:24,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:41:24,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:41:24,157 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:41:24,157 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:41:24,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-01-31 20:41:24,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6757e516c/6541a5a906e64993987e68a1d80670e5/FLAG92e07559f [2022-01-31 20:41:24,571 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:41:24,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-01-31 20:41:24,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6757e516c/6541a5a906e64993987e68a1d80670e5/FLAG92e07559f [2022-01-31 20:41:24,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6757e516c/6541a5a906e64993987e68a1d80670e5 [2022-01-31 20:41:24,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:41:24,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:41:24,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:41:24,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:41:24,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:41:24,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7376ada7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24, skipping insertion in model container [2022-01-31 20:41:24,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:41:24,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:41:24,746 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/vogal-2.i[808,821] [2022-01-31 20:41:24,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:41:24,779 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:41:24,787 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/vogal-2.i[808,821] [2022-01-31 20:41:24,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:41:24,812 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:41:24,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24 WrapperNode [2022-01-31 20:41:24,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:41:24,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:41:24,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:41:24,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:41:24,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:41:24,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:41:24,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:41:24,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:41:24,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24" (1/1) ... [2022-01-31 20:41:24,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:41:24,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:41:24,900 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) [2022-01-31 20:41:24,906 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 [2022-01-31 20:41:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:41:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:41:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:41:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:41:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:41:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:41:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:41:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:41:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:41:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:41:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:41:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:41:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-01-31 20:41:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:41:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 20:41:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:41:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:41:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:41:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:41:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:41:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:41:25,004 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:41:25,016 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:41:25,180 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:41:25,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:41:25,184 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-31 20:41:25,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:41:25 BoogieIcfgContainer [2022-01-31 20:41:25,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:41:25,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:41:25,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:41:25,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:41:25,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:41:24" (1/3) ... [2022-01-31 20:41:25,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc08e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:41:25, skipping insertion in model container [2022-01-31 20:41:25,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:24" (2/3) ... [2022-01-31 20:41:25,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc08e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:41:25, skipping insertion in model container [2022-01-31 20:41:25,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:41:25" (3/3) ... [2022-01-31 20:41:25,194 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-01-31 20:41:25,198 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:41:25,198 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:41:25,232 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:41:25,238 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 [2022-01-31 20:41:25,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:41:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:41:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 20:41:25,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:25,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:25,256 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:25,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-01-31 20:41:25,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:25,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637724561] [2022-01-31 20:41:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:25,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:25,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:25,444 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:25,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637724561] [2022-01-31 20:41:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [637724561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:25,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:25,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:41:25,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856434796] [2022-01-31 20:41:25,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:25,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:41:25,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:25,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:41:25,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:41:25,472 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:25,514 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-01-31 20:41:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:41:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 20:41:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:25,521 INFO L225 Difference]: With dead ends: 64 [2022-01-31 20:41:25,521 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 20:41:25,523 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 [2022-01-31 20:41:25,527 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:25,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:41:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 20:41:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 20:41:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-01-31 20:41:25,553 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-01-31 20:41:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:25,554 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-01-31 20:41:25,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-01-31 20:41:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 20:41:25,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:25,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:25,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:41:25,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:25,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-01-31 20:41:25,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:25,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173303465] [2022-01-31 20:41:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:25,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:25,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:25,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:25,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173303465] [2022-01-31 20:41:25,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [173303465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:25,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:25,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:41:25,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660646131] [2022-01-31 20:41:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:25,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:41:25,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:41:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:41:25,653 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:25,737 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-01-31 20:41:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:41:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 20:41:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:25,739 INFO L225 Difference]: With dead ends: 65 [2022-01-31 20:41:25,739 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 20:41:25,740 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 [2022-01-31 20:41:25,740 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:25,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 20:41:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-01-31 20:41:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-01-31 20:41:25,746 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-01-31 20:41:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:25,746 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-01-31 20:41:25,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-01-31 20:41:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 20:41:25,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:25,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:25,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:41:25,749 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-01-31 20:41:25,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:25,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781707415] [2022-01-31 20:41:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:25,767 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:25,767 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:25,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:25,769 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:25,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:25,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781707415] [2022-01-31 20:41:25,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781707415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:25,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:25,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:41:25,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960200955] [2022-01-31 20:41:25,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:25,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:41:25,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:25,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:41:25,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:41:25,868 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:25,981 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2022-01-31 20:41:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:41:25,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 20:41:25,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:25,982 INFO L225 Difference]: With dead ends: 80 [2022-01-31 20:41:25,983 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 20:41:25,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:25,984 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:25,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 20:41:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2022-01-31 20:41:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-31 20:41:26,004 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 21 [2022-01-31 20:41:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:26,004 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-31 20:41:26,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-31 20:41:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 20:41:26,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:26,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:26,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:41:26,005 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash -671441351, now seen corresponding path program 2 times [2022-01-31 20:41:26,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:26,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612798277] [2022-01-31 20:41:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:26,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:26,009 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:26,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:26,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:26,072 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612798277] [2022-01-31 20:41:26,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1612798277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:26,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:26,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:41:26,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783234729] [2022-01-31 20:41:26,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:26,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:41:26,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:41:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:41:26,074 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:26,201 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-01-31 20:41:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:41:26,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 20:41:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:26,203 INFO L225 Difference]: With dead ends: 95 [2022-01-31 20:41:26,203 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 20:41:26,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:26,204 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:26,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 46 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 20:41:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 34. [2022-01-31 20:41:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-31 20:41:26,212 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-01-31 20:41:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-31 20:41:26,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-31 20:41:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 20:41:26,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:26,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:26,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:41:26,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash -864301033, now seen corresponding path program 3 times [2022-01-31 20:41:26,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365873258] [2022-01-31 20:41:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:26,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:26,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:26,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:26,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:26,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:26,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:26,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365873258] [2022-01-31 20:41:26,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [365873258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:26,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:26,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:41:26,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427750647] [2022-01-31 20:41:26,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:26,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:41:26,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:26,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:41:26,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:26,297 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:26,493 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2022-01-31 20:41:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:41:26,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 20:41:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:26,494 INFO L225 Difference]: With dead ends: 110 [2022-01-31 20:41:26,499 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 20:41:26,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:26,504 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 162 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:26,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 73 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 20:41:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 36. [2022-01-31 20:41:26,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-01-31 20:41:26,521 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2022-01-31 20:41:26,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:26,521 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-01-31 20:41:26,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-01-31 20:41:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 20:41:26,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:26,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:26,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:41:26,522 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:26,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1518861707, now seen corresponding path program 4 times [2022-01-31 20:41:26,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:26,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821643102] [2022-01-31 20:41:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:26,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:26,525 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:26,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:26,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:26,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:26,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:26,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821643102] [2022-01-31 20:41:26,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [821643102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:26,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:26,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:41:26,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90241215] [2022-01-31 20:41:26,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:26,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:41:26,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:26,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:41:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:41:26,620 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:26,913 INFO L93 Difference]: Finished difference Result 125 states and 169 transitions. [2022-01-31 20:41:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:41:26,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 20:41:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:26,914 INFO L225 Difference]: With dead ends: 125 [2022-01-31 20:41:26,915 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 20:41:26,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:26,915 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 240 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:26,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 75 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 20:41:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 38. [2022-01-31 20:41:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-01-31 20:41:26,922 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 27 [2022-01-31 20:41:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:26,922 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-01-31 20:41:26,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-01-31 20:41:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 20:41:26,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:26,923 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:26,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:41:26,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash 808523091, now seen corresponding path program 5 times [2022-01-31 20:41:26,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:26,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880888446] [2022-01-31 20:41:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:26,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:26,925 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:26,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:26,926 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:27,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:27,012 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:27,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880888446] [2022-01-31 20:41:27,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [880888446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:27,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:27,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:41:27,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018432007] [2022-01-31 20:41:27,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:27,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:41:27,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:27,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:41:27,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:27,014 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:27,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:27,348 INFO L93 Difference]: Finished difference Result 140 states and 190 transitions. [2022-01-31 20:41:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:41:27,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 20:41:27,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:27,349 INFO L225 Difference]: With dead ends: 140 [2022-01-31 20:41:27,349 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 20:41:27,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:41:27,353 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 228 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:27,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 20:41:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 40. [2022-01-31 20:41:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-01-31 20:41:27,364 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 29 [2022-01-31 20:41:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:27,364 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-01-31 20:41:27,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-01-31 20:41:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 20:41:27,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:27,369 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:27,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:41:27,370 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:27,370 INFO L85 PathProgramCache]: Analyzing trace with hash -252647247, now seen corresponding path program 6 times [2022-01-31 20:41:27,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:27,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293620781] [2022-01-31 20:41:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:27,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:27,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:27,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:27,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:27,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:27,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:27,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293620781] [2022-01-31 20:41:27,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [293620781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:27,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:27,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:41:27,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408400572] [2022-01-31 20:41:27,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:27,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:41:27,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:27,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:41:27,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:41:27,495 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:27,936 INFO L93 Difference]: Finished difference Result 155 states and 211 transitions. [2022-01-31 20:41:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:41:27,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 20:41:27,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:27,937 INFO L225 Difference]: With dead ends: 155 [2022-01-31 20:41:27,937 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 20:41:27,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:41:27,938 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 321 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:27,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 104 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 20:41:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2022-01-31 20:41:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-01-31 20:41:27,945 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 31 [2022-01-31 20:41:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:27,946 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-01-31 20:41:27,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-01-31 20:41:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 20:41:27,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:27,946 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:27,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:41:27,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2130092913, now seen corresponding path program 7 times [2022-01-31 20:41:27,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:27,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592738847] [2022-01-31 20:41:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:27,954 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:27,954 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:27,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:27,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:28,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:28,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:28,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592738847] [2022-01-31 20:41:28,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [592738847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:28,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:28,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:41:28,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419504719] [2022-01-31 20:41:28,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:28,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:41:28,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:28,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:41:28,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:28,089 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:28,620 INFO L93 Difference]: Finished difference Result 170 states and 232 transitions. [2022-01-31 20:41:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:41:28,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 20:41:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:28,622 INFO L225 Difference]: With dead ends: 170 [2022-01-31 20:41:28,622 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 20:41:28,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:41:28,623 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 369 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:28,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 116 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:41:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 20:41:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 44. [2022-01-31 20:41:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-01-31 20:41:28,653 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2022-01-31 20:41:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-01-31 20:41:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-01-31 20:41:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 20:41:28,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:28,654 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:28,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:41:28,654 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1825853677, now seen corresponding path program 8 times [2022-01-31 20:41:28,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:28,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611122299] [2022-01-31 20:41:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:28,656 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:28,656 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:28,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:28,657 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:28,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:28,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611122299] [2022-01-31 20:41:28,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611122299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:28,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:28,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:41:28,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958912450] [2022-01-31 20:41:28,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:28,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:41:28,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:41:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:41:28,773 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:29,437 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2022-01-31 20:41:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:41:29,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 20:41:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:29,438 INFO L225 Difference]: With dead ends: 185 [2022-01-31 20:41:29,438 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 20:41:29,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:41:29,439 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 327 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:29,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 158 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:41:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 20:41:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 46. [2022-01-31 20:41:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-01-31 20:41:29,451 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2022-01-31 20:41:29,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:29,452 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-01-31 20:41:29,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-01-31 20:41:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 20:41:29,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:29,453 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:29,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:41:29,453 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:29,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:29,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1850497589, now seen corresponding path program 9 times [2022-01-31 20:41:29,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:29,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013926313] [2022-01-31 20:41:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:29,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:29,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:29,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:29,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:29,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:29,604 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:29,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013926313] [2022-01-31 20:41:29,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013926313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:29,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:29,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:41:29,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851214325] [2022-01-31 20:41:29,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:29,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:41:29,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:41:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:29,605 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:30,454 INFO L93 Difference]: Finished difference Result 200 states and 274 transitions. [2022-01-31 20:41:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:41:30,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 20:41:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:30,455 INFO L225 Difference]: With dead ends: 200 [2022-01-31 20:41:30,455 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 20:41:30,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:41:30,456 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 360 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:30,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 175 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:41:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 20:41:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 48. [2022-01-31 20:41:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-01-31 20:41:30,466 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2022-01-31 20:41:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:30,467 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-01-31 20:41:30,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-01-31 20:41:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 20:41:30,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:30,467 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:30,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:41:30,467 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash -65979607, now seen corresponding path program 10 times [2022-01-31 20:41:30,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:30,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070760762] [2022-01-31 20:41:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:30,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:30,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:30,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:30,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:30,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:30,563 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:30,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070760762] [2022-01-31 20:41:30,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2070760762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:30,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:30,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:41:30,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71979290] [2022-01-31 20:41:30,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:30,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:41:30,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:41:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:30,564 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:30,673 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-01-31 20:41:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:41:30,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 20:41:30,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:30,674 INFO L225 Difference]: With dead ends: 72 [2022-01-31 20:41:30,674 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 20:41:30,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:30,675 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:30,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 20:41:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-01-31 20:41:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-01-31 20:41:30,694 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 39 [2022-01-31 20:41:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:30,694 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-01-31 20:41:30,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-01-31 20:41:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 20:41:30,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:30,695 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:30,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:41:30,695 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2124486910, now seen corresponding path program 1 times [2022-01-31 20:41:30,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:30,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217204437] [2022-01-31 20:41:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:30,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:30,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:30,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:30,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:30,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:30,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:30,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217204437] [2022-01-31 20:41:30,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [217204437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:30,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:30,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:41:30,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885306664] [2022-01-31 20:41:30,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:30,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:41:30,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:30,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:41:30,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:41:30,741 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:30,826 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2022-01-31 20:41:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:41:30,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 20:41:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:30,827 INFO L225 Difference]: With dead ends: 113 [2022-01-31 20:41:30,827 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 20:41:30,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:30,828 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:30,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:41:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 20:41:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-01-31 20:41:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-01-31 20:41:30,857 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 45 [2022-01-31 20:41:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:30,858 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-01-31 20:41:30,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-01-31 20:41:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 20:41:30,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:30,858 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:30,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:41:30,858 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:30,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1273709643, now seen corresponding path program 2 times [2022-01-31 20:41:30,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:30,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504539207] [2022-01-31 20:41:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:30,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:30,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:30,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:30,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:30,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:30,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504539207] [2022-01-31 20:41:30,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [504539207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:30,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:30,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:41:30,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467005322] [2022-01-31 20:41:30,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:30,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:41:30,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:30,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:41:30,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:41:30,914 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:31,032 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2022-01-31 20:41:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:41:31,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 20:41:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:31,033 INFO L225 Difference]: With dead ends: 141 [2022-01-31 20:41:31,033 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 20:41:31,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:31,033 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:31,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:41:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 20:41:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-01-31 20:41:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-01-31 20:41:31,067 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 48 [2022-01-31 20:41:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:31,068 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-01-31 20:41:31,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-01-31 20:41:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:41:31,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:31,068 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:31,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:41:31,068 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:31,069 INFO L85 PathProgramCache]: Analyzing trace with hash -370162142, now seen corresponding path program 3 times [2022-01-31 20:41:31,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:31,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544699118] [2022-01-31 20:41:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:31,070 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:31,070 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:31,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:31,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:31,129 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:31,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544699118] [2022-01-31 20:41:31,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [544699118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:31,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:31,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:41:31,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393199616] [2022-01-31 20:41:31,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:31,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:41:31,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:41:31,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:31,130 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:31,259 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2022-01-31 20:41:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:41:31,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 20:41:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:31,260 INFO L225 Difference]: With dead ends: 165 [2022-01-31 20:41:31,260 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 20:41:31,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:31,260 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:31,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 20:41:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-01-31 20:41:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.263157894736842) internal successors, (120), 95 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-01-31 20:41:31,297 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 51 [2022-01-31 20:41:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:31,297 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-01-31 20:41:31,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-01-31 20:41:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 20:41:31,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:31,298 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:31,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:41:31,298 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:31,299 INFO L85 PathProgramCache]: Analyzing trace with hash 653396117, now seen corresponding path program 4 times [2022-01-31 20:41:31,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:31,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062586193] [2022-01-31 20:41:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:31,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:31,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:31,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:31,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:31,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:31,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062586193] [2022-01-31 20:41:31,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062586193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:31,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:31,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:41:31,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505245956] [2022-01-31 20:41:31,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:31,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:41:31,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:31,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:41:31,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:41:31,405 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:31,557 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2022-01-31 20:41:31,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:41:31,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 20:41:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:31,558 INFO L225 Difference]: With dead ends: 189 [2022-01-31 20:41:31,558 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 20:41:31,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:31,559 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:31,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 51 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 20:41:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2022-01-31 20:41:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 107 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2022-01-31 20:41:31,602 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 54 [2022-01-31 20:41:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:31,602 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2022-01-31 20:41:31,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2022-01-31 20:41:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 20:41:31,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:31,602 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:31,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:41:31,603 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash -790311614, now seen corresponding path program 5 times [2022-01-31 20:41:31,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:31,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807844242] [2022-01-31 20:41:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:31,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:31,605 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:31,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:31,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:31,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:31,685 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:31,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807844242] [2022-01-31 20:41:31,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [807844242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:31,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:31,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:41:31,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128499466] [2022-01-31 20:41:31,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:31,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:41:31,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:41:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:31,687 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:31,901 INFO L93 Difference]: Finished difference Result 213 states and 279 transitions. [2022-01-31 20:41:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:41:31,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 20:41:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:31,902 INFO L225 Difference]: With dead ends: 213 [2022-01-31 20:41:31,902 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 20:41:31,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:41:31,903 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:31,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 60 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 20:41:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-01-31 20:41:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 119 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2022-01-31 20:41:31,955 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 57 [2022-01-31 20:41:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:31,955 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2022-01-31 20:41:31,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2022-01-31 20:41:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:41:31,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:31,955 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:31,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:41:31,956 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash -484823691, now seen corresponding path program 6 times [2022-01-31 20:41:31,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184946598] [2022-01-31 20:41:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:31,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:31,958 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:31,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:31,959 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:32,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:32,042 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:32,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184946598] [2022-01-31 20:41:32,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184946598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:32,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:32,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:41:32,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349827163] [2022-01-31 20:41:32,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:32,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:41:32,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:41:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:41:32,044 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:32,316 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2022-01-31 20:41:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:41:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 20:41:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:32,317 INFO L225 Difference]: With dead ends: 237 [2022-01-31 20:41:32,317 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 20:41:32,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:41:32,318 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:32,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:32,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 20:41:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2022-01-31 20:41:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.282442748091603) internal successors, (168), 131 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2022-01-31 20:41:32,375 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 60 [2022-01-31 20:41:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:32,376 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2022-01-31 20:41:32,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2022-01-31 20:41:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:41:32,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:32,376 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:32,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:41:32,376 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:32,377 INFO L85 PathProgramCache]: Analyzing trace with hash -729809822, now seen corresponding path program 7 times [2022-01-31 20:41:32,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:32,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713986771] [2022-01-31 20:41:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:32,378 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:32,378 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:32,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:32,379 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:32,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:32,488 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713986771] [2022-01-31 20:41:32,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [713986771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:32,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:32,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:41:32,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441117993] [2022-01-31 20:41:32,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:32,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:41:32,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:41:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:32,490 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:32,845 INFO L93 Difference]: Finished difference Result 261 states and 343 transitions. [2022-01-31 20:41:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:41:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 20:41:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:32,846 INFO L225 Difference]: With dead ends: 261 [2022-01-31 20:41:32,846 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 20:41:32,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:41:32,847 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 126 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:32,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 20:41:32,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-01-31 20:41:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2867132867132867) internal successors, (184), 143 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2022-01-31 20:41:32,912 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 63 [2022-01-31 20:41:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:32,912 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2022-01-31 20:41:32,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2022-01-31 20:41:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:41:32,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:32,913 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:32,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:41:32,913 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:32,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1962202539, now seen corresponding path program 8 times [2022-01-31 20:41:32,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192255754] [2022-01-31 20:41:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:32,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:32,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:32,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:32,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:32,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:32,968 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:32,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192255754] [2022-01-31 20:41:32,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [192255754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:32,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:32,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:41:32,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440063739] [2022-01-31 20:41:32,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:32,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:41:32,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:32,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:41:32,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:41:32,969 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:33,095 INFO L93 Difference]: Finished difference Result 327 states and 426 transitions. [2022-01-31 20:41:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:41:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:41:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:33,096 INFO L225 Difference]: With dead ends: 327 [2022-01-31 20:41:33,096 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 20:41:33,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:41:33,097 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:33,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 40 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:41:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 20:41:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 152. [2022-01-31 20:41:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.2857142857142858) internal successors, (189), 147 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 193 transitions. [2022-01-31 20:41:33,163 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 193 transitions. Word has length 66 [2022-01-31 20:41:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:33,163 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 193 transitions. [2022-01-31 20:41:33,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 193 transitions. [2022-01-31 20:41:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 20:41:33,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:33,164 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:33,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:41:33,164 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1992147995, now seen corresponding path program 1 times [2022-01-31 20:41:33,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:33,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333214363] [2022-01-31 20:41:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:33,166 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:33,166 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:33,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:33,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:33,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:33,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333214363] [2022-01-31 20:41:33,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [333214363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:33,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:33,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:41:33,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597174222] [2022-01-31 20:41:33,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:33,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:41:33,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:41:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:41:33,282 INFO L87 Difference]: Start difference. First operand 152 states and 193 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:33,702 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2022-01-31 20:41:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:41:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 20:41:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:33,703 INFO L225 Difference]: With dead ends: 244 [2022-01-31 20:41:33,703 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 20:41:33,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:41:33,704 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 147 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:33,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 111 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 20:41:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-01-31 20:41:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 153 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2022-01-31 20:41:33,794 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 67 [2022-01-31 20:41:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:33,794 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2022-01-31 20:41:33,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2022-01-31 20:41:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 20:41:33,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:33,795 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:33,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:41:33,795 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 1 times [2022-01-31 20:41:33,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:33,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255548128] [2022-01-31 20:41:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:33,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:33,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:33,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:33,798 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:33,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:33,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:33,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255548128] [2022-01-31 20:41:33,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [255548128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:33,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:33,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:41:33,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185986456] [2022-01-31 20:41:33,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:33,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:41:33,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:41:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:33,940 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:34,239 INFO L93 Difference]: Finished difference Result 341 states and 443 transitions. [2022-01-31 20:41:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:41:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 20:41:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:34,241 INFO L225 Difference]: With dead ends: 341 [2022-01-31 20:41:34,241 INFO L226 Difference]: Without dead ends: 336 [2022-01-31 20:41:34,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:41:34,241 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 120 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:34,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 56 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-31 20:41:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 160. [2022-01-31 20:41:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.2838709677419355) internal successors, (199), 155 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 203 transitions. [2022-01-31 20:41:34,313 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 203 transitions. Word has length 68 [2022-01-31 20:41:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:34,313 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 203 transitions. [2022-01-31 20:41:34,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 203 transitions. [2022-01-31 20:41:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 20:41:34,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:34,314 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:34,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:41:34,314 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:34,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:34,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1762866155, now seen corresponding path program 2 times [2022-01-31 20:41:34,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:34,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705105726] [2022-01-31 20:41:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:34,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:34,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:34,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:34,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:34,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:34,440 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:34,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705105726] [2022-01-31 20:41:34,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1705105726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:34,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:34,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:41:34,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945121700] [2022-01-31 20:41:34,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:34,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:41:34,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:41:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:34,441 INFO L87 Difference]: Start difference. First operand 160 states and 203 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:34,908 INFO L93 Difference]: Finished difference Result 299 states and 389 transitions. [2022-01-31 20:41:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:41:34,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 20:41:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:34,909 INFO L225 Difference]: With dead ends: 299 [2022-01-31 20:41:34,909 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 20:41:34,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:41:34,910 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 157 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:34,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 98 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 20:41:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2022-01-31 20:41:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.2732919254658386) internal successors, (205), 161 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 209 transitions. [2022-01-31 20:41:34,984 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 209 transitions. Word has length 70 [2022-01-31 20:41:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:34,984 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 209 transitions. [2022-01-31 20:41:34,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 209 transitions. [2022-01-31 20:41:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 20:41:34,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:34,985 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:34,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:41:34,985 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash 225571355, now seen corresponding path program 3 times [2022-01-31 20:41:34,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:34,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980888972] [2022-01-31 20:41:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:34,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:34,987 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:34,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:34,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:35,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:35,224 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980888972] [2022-01-31 20:41:35,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1980888972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:35,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:35,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:41:35,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137977554] [2022-01-31 20:41:35,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:35,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:41:35,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:35,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:41:35,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:41:35,225 INFO L87 Difference]: Start difference. First operand 166 states and 209 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:35,439 INFO L93 Difference]: Finished difference Result 242 states and 307 transitions. [2022-01-31 20:41:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:41:35,440 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 20:41:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:35,440 INFO L225 Difference]: With dead ends: 242 [2022-01-31 20:41:35,441 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 20:41:35,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:41:35,441 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:35,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 34 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 20:41:35,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-01-31 20:41:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.270440251572327) internal successors, (202), 159 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2022-01-31 20:41:35,511 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 73 [2022-01-31 20:41:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:35,512 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2022-01-31 20:41:35,512 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2022-01-31 20:41:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:41:35,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:35,512 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:35,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:41:35,513 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 1 times [2022-01-31 20:41:35,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:35,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673811615] [2022-01-31 20:41:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:35,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:35,514 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:35,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:35,515 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:35,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:35,584 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:35,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673811615] [2022-01-31 20:41:35,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [673811615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:35,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:35,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:41:35,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593011310] [2022-01-31 20:41:35,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:35,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:41:35,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:41:35,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:35,585 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:36,128 INFO L93 Difference]: Finished difference Result 732 states and 956 transitions. [2022-01-31 20:41:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:41:36,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 20:41:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:36,131 INFO L225 Difference]: With dead ends: 732 [2022-01-31 20:41:36,131 INFO L226 Difference]: Without dead ends: 658 [2022-01-31 20:41:36,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:41:36,132 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 128 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:36,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 61 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:36,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-31 20:41:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 170. [2022-01-31 20:41:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2727272727272727) internal successors, (210), 165 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2022-01-31 20:41:36,235 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 75 [2022-01-31 20:41:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:36,235 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2022-01-31 20:41:36,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2022-01-31 20:41:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 20:41:36,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:36,236 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:36,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:41:36,236 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 2 times [2022-01-31 20:41:36,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:36,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421991655] [2022-01-31 20:41:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:36,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:36,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:36,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:36,240 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:36,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:36,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:36,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421991655] [2022-01-31 20:41:36,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421991655] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:36,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:36,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:41:36,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236435367] [2022-01-31 20:41:36,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:36,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:41:36,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:41:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:41:36,356 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:37,083 INFO L93 Difference]: Finished difference Result 747 states and 975 transitions. [2022-01-31 20:41:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:41:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 20:41:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:37,085 INFO L225 Difference]: With dead ends: 747 [2022-01-31 20:41:37,085 INFO L226 Difference]: Without dead ends: 673 [2022-01-31 20:41:37,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:37,086 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:37,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 104 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-31 20:41:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 172. [2022-01-31 20:41:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.2754491017964071) internal successors, (213), 167 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 217 transitions. [2022-01-31 20:41:37,167 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 217 transitions. Word has length 79 [2022-01-31 20:41:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:37,167 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 217 transitions. [2022-01-31 20:41:37,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 217 transitions. [2022-01-31 20:41:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 20:41:37,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:37,168 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:37,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:41:37,169 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 3 times [2022-01-31 20:41:37,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:37,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316813852] [2022-01-31 20:41:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:37,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:37,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:37,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:37,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:37,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:37,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:37,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316813852] [2022-01-31 20:41:37,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1316813852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:37,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:37,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:41:37,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996888126] [2022-01-31 20:41:37,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:37,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:41:37,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:41:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:41:37,303 INFO L87 Difference]: Start difference. First operand 172 states and 217 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:38,246 INFO L93 Difference]: Finished difference Result 1125 states and 1475 transitions. [2022-01-31 20:41:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:41:38,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 20:41:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:38,249 INFO L225 Difference]: With dead ends: 1125 [2022-01-31 20:41:38,249 INFO L226 Difference]: Without dead ends: 1051 [2022-01-31 20:41:38,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:41:38,250 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 236 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:38,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 128 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-01-31 20:41:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 176. [2022-01-31 20:41:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.280701754385965) internal successors, (219), 171 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2022-01-31 20:41:38,339 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 81 [2022-01-31 20:41:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:38,340 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2022-01-31 20:41:38,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2022-01-31 20:41:38,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 20:41:38,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:38,340 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:38,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:41:38,341 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:38,341 INFO L85 PathProgramCache]: Analyzing trace with hash 315077885, now seen corresponding path program 4 times [2022-01-31 20:41:38,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:38,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004106274] [2022-01-31 20:41:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:38,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:38,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:38,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:38,343 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:38,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:38,453 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004106274] [2022-01-31 20:41:38,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004106274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:38,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:38,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:41:38,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248706817] [2022-01-31 20:41:38,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:38,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:41:38,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:41:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:38,454 INFO L87 Difference]: Start difference. First operand 176 states and 223 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:39,587 INFO L93 Difference]: Finished difference Result 1140 states and 1494 transitions. [2022-01-31 20:41:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:41:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 20:41:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:39,590 INFO L225 Difference]: With dead ends: 1140 [2022-01-31 20:41:39,590 INFO L226 Difference]: Without dead ends: 1066 [2022-01-31 20:41:39,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:41:39,591 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 235 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:39,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 171 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:41:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-01-31 20:41:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 178. [2022-01-31 20:41:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.283236994219653) internal successors, (222), 173 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 226 transitions. [2022-01-31 20:41:39,687 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 226 transitions. Word has length 85 [2022-01-31 20:41:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:39,687 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 226 transitions. [2022-01-31 20:41:39,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 226 transitions. [2022-01-31 20:41:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 20:41:39,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:39,688 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:39,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:41:39,688 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1475350488, now seen corresponding path program 5 times [2022-01-31 20:41:39,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:39,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041078939] [2022-01-31 20:41:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:39,689 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:39,689 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:39,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:39,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:39,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:39,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:39,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041078939] [2022-01-31 20:41:39,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041078939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:39,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:39,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:41:39,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214967608] [2022-01-31 20:41:39,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:39,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:41:39,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:39,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:41:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:39,838 INFO L87 Difference]: Start difference. First operand 178 states and 226 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:41,527 INFO L93 Difference]: Finished difference Result 1518 states and 1994 transitions. [2022-01-31 20:41:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:41:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 20:41:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:41,530 INFO L225 Difference]: With dead ends: 1518 [2022-01-31 20:41:41,530 INFO L226 Difference]: Without dead ends: 1444 [2022-01-31 20:41:41,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:41:41,531 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 326 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:41,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 200 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:41:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-01-31 20:41:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 182. [2022-01-31 20:41:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2881355932203389) internal successors, (228), 177 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 232 transitions. [2022-01-31 20:41:41,640 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 232 transitions. Word has length 87 [2022-01-31 20:41:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:41,640 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 232 transitions. [2022-01-31 20:41:41,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 232 transitions. [2022-01-31 20:41:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 20:41:41,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:41,641 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:41,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:41:41,641 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1709610318, now seen corresponding path program 6 times [2022-01-31 20:41:41,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:41,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080031130] [2022-01-31 20:41:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:41,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:41,643 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:41,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:41,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:41,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:41,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:41,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080031130] [2022-01-31 20:41:41,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080031130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:41,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:41,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:41:41,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146431503] [2022-01-31 20:41:41,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:41,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:41:41,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:41:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:41:41,801 INFO L87 Difference]: Start difference. First operand 182 states and 232 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:43,837 INFO L93 Difference]: Finished difference Result 1533 states and 2013 transitions. [2022-01-31 20:41:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:41:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 20:41:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:43,841 INFO L225 Difference]: With dead ends: 1533 [2022-01-31 20:41:43,841 INFO L226 Difference]: Without dead ends: 1459 [2022-01-31 20:41:43,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:41:43,842 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 311 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:43,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 248 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:41:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-01-31 20:41:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 184. [2022-01-31 20:41:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 235 transitions. [2022-01-31 20:41:43,958 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 235 transitions. Word has length 91 [2022-01-31 20:41:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:43,959 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 235 transitions. [2022-01-31 20:41:43,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 235 transitions. [2022-01-31 20:41:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:41:43,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:43,959 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:43,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:41:43,960 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1591222249, now seen corresponding path program 7 times [2022-01-31 20:41:43,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:43,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120796415] [2022-01-31 20:41:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:43,961 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:43,961 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:43,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:43,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:44,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:44,136 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:44,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120796415] [2022-01-31 20:41:44,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [120796415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:44,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:44,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:41:44,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929392734] [2022-01-31 20:41:44,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:44,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:41:44,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:41:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:41:44,137 INFO L87 Difference]: Start difference. First operand 184 states and 235 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:46,747 INFO L93 Difference]: Finished difference Result 1911 states and 2513 transitions. [2022-01-31 20:41:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:41:46,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 20:41:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:46,751 INFO L225 Difference]: With dead ends: 1911 [2022-01-31 20:41:46,751 INFO L226 Difference]: Without dead ends: 1837 [2022-01-31 20:41:46,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:41:46,752 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 444 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2641 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:46,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 267 Invalid, 2667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2641 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:41:46,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2022-01-31 20:41:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 188. [2022-01-31 20:41:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.2950819672131149) internal successors, (237), 183 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2022-01-31 20:41:46,888 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 93 [2022-01-31 20:41:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:46,889 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2022-01-31 20:41:46,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2022-01-31 20:41:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 20:41:46,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:46,889 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:46,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:41:46,890 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:46,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1690946337, now seen corresponding path program 8 times [2022-01-31 20:41:46,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:46,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154829065] [2022-01-31 20:41:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:46,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:46,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:46,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:46,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:47,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:47,092 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:47,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154829065] [2022-01-31 20:41:47,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154829065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:47,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:47,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:41:47,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041450861] [2022-01-31 20:41:47,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:47,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:41:47,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:47,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:41:47,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:41:47,094 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:50,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:50,380 INFO L93 Difference]: Finished difference Result 2173 states and 2859 transitions. [2022-01-31 20:41:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:41:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 20:41:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:50,386 INFO L225 Difference]: With dead ends: 2173 [2022-01-31 20:41:50,386 INFO L226 Difference]: Without dead ends: 2099 [2022-01-31 20:41:50,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:41:50,388 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 504 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3707 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:50,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 315 Invalid, 3735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3707 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:41:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2022-01-31 20:41:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 192. [2022-01-31 20:41:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2994652406417113) internal successors, (243), 187 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 247 transitions. [2022-01-31 20:41:50,539 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 247 transitions. Word has length 97 [2022-01-31 20:41:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:50,539 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 247 transitions. [2022-01-31 20:41:50,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 247 transitions. [2022-01-31 20:41:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 20:41:50,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:50,540 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:50,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:41:50,540 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1611342123, now seen corresponding path program 9 times [2022-01-31 20:41:50,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:50,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21171753] [2022-01-31 20:41:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:50,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:50,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:50,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:50,543 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:50,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:50,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:50,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21171753] [2022-01-31 20:41:50,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [21171753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:50,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:50,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:41:50,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603959021] [2022-01-31 20:41:50,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:50,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:41:50,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:50,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:41:50,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:41:50,772 INFO L87 Difference]: Start difference. First operand 192 states and 247 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:54,824 INFO L93 Difference]: Finished difference Result 2188 states and 2878 transitions. [2022-01-31 20:41:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:41:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 20:41:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:54,830 INFO L225 Difference]: With dead ends: 2188 [2022-01-31 20:41:54,830 INFO L226 Difference]: Without dead ends: 2114 [2022-01-31 20:41:54,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:41:54,832 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 486 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4765 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:54,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 351 Invalid, 4787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4765 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 20:41:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2022-01-31 20:41:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 194. [2022-01-31 20:41:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.3015873015873016) internal successors, (246), 189 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 250 transitions. [2022-01-31 20:41:54,987 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 250 transitions. Word has length 101 [2022-01-31 20:41:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:54,987 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 250 transitions. [2022-01-31 20:41:54,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 250 transitions. [2022-01-31 20:41:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:41:54,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:54,988 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:54,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:41:54,988 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1408087540, now seen corresponding path program 1 times [2022-01-31 20:41:54,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:54,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436229979] [2022-01-31 20:41:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:54,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:54,989 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:54,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:54,991 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:57,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:57,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:57,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436229979] [2022-01-31 20:41:57,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436229979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:57,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:57,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:41:57,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014314157] [2022-01-31 20:41:57,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:57,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:41:57,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:57,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:41:57,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:41:57,234 INFO L87 Difference]: Start difference. First operand 194 states and 250 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:00,258 INFO L93 Difference]: Finished difference Result 461 states and 602 transitions. [2022-01-31 20:42:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:42:00,259 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:00,260 INFO L225 Difference]: With dead ends: 461 [2022-01-31 20:42:00,260 INFO L226 Difference]: Without dead ends: 422 [2022-01-31 20:42:00,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=571, Invalid=3851, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 20:42:00,261 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 400 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:00,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 111 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:42:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-31 20:42:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 309. [2022-01-31 20:42:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.305921052631579) internal successors, (397), 304 states have internal predecessors, (397), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 401 transitions. [2022-01-31 20:42:00,562 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 401 transitions. Word has length 102 [2022-01-31 20:42:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:00,562 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 401 transitions. [2022-01-31 20:42:00,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 401 transitions. [2022-01-31 20:42:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:00,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:00,563 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:00,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:42:00,563 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114550, now seen corresponding path program 1 times [2022-01-31 20:42:00,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:00,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360567490] [2022-01-31 20:42:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:00,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:00,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:00,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:00,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:01,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:01,240 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:01,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360567490] [2022-01-31 20:42:01,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360567490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:01,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:01,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:42:01,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500796026] [2022-01-31 20:42:01,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:01,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:42:01,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:42:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:42:01,241 INFO L87 Difference]: Start difference. First operand 309 states and 401 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:02,353 INFO L93 Difference]: Finished difference Result 476 states and 618 transitions. [2022-01-31 20:42:02,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:42:02,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:02,354 INFO L225 Difference]: With dead ends: 476 [2022-01-31 20:42:02,354 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 20:42:02,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:42:02,355 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 116 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:02,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 83 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:42:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 20:42:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 345. [2022-01-31 20:42:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.3) internal successors, (442), 340 states have internal predecessors, (442), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 446 transitions. [2022-01-31 20:42:02,699 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 446 transitions. Word has length 102 [2022-01-31 20:42:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:02,699 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 446 transitions. [2022-01-31 20:42:02,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 446 transitions. [2022-01-31 20:42:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:02,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:02,700 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:02,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:42:02,700 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash 520185162, now seen corresponding path program 1 times [2022-01-31 20:42:02,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:02,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117972465] [2022-01-31 20:42:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:02,702 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:02,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:02,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:02,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:04,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:04,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:04,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117972465] [2022-01-31 20:42:04,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2117972465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:04,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:04,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:42:04,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270641873] [2022-01-31 20:42:04,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:04,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:42:04,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:04,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:42:04,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:42:04,666 INFO L87 Difference]: Start difference. First operand 345 states and 446 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:07,175 INFO L93 Difference]: Finished difference Result 615 states and 801 transitions. [2022-01-31 20:42:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 20:42:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:07,177 INFO L225 Difference]: With dead ends: 615 [2022-01-31 20:42:07,177 INFO L226 Difference]: Without dead ends: 576 [2022-01-31 20:42:07,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=463, Invalid=2507, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 20:42:07,178 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 308 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:07,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 118 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:42:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-31 20:42:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 333. [2022-01-31 20:42:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.3018292682926829) internal successors, (427), 328 states have internal predecessors, (427), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 431 transitions. [2022-01-31 20:42:07,521 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 431 transitions. Word has length 102 [2022-01-31 20:42:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:07,521 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 431 transitions. [2022-01-31 20:42:07,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 431 transitions. [2022-01-31 20:42:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:07,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:07,522 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:07,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:42:07,522 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash 127158152, now seen corresponding path program 1 times [2022-01-31 20:42:07,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:07,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311885434] [2022-01-31 20:42:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:07,524 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:07,524 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:07,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:07,525 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:08,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:08,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:08,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311885434] [2022-01-31 20:42:08,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [311885434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:08,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:08,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:42:08,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218484630] [2022-01-31 20:42:08,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:08,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:42:08,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:42:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:42:08,041 INFO L87 Difference]: Start difference. First operand 333 states and 431 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:08,881 INFO L93 Difference]: Finished difference Result 485 states and 627 transitions. [2022-01-31 20:42:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:42:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:08,882 INFO L225 Difference]: With dead ends: 485 [2022-01-31 20:42:08,882 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 20:42:08,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:42:08,884 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 115 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:08,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 73 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:42:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 20:42:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-01-31 20:42:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.295731707317073) internal successors, (425), 328 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 429 transitions. [2022-01-31 20:42:09,221 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 429 transitions. Word has length 102 [2022-01-31 20:42:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:09,221 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 429 transitions. [2022-01-31 20:42:09,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 429 transitions. [2022-01-31 20:42:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:09,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:09,222 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:09,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:42:09,222 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 2 times [2022-01-31 20:42:09,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:09,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754802508] [2022-01-31 20:42:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:09,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:09,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:09,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:09,225 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:09,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:09,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:09,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754802508] [2022-01-31 20:42:09,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1754802508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:09,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:09,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:42:09,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138356658] [2022-01-31 20:42:09,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:09,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:42:09,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:09,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:42:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:42:09,798 INFO L87 Difference]: Start difference. First operand 333 states and 429 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:10,709 INFO L93 Difference]: Finished difference Result 485 states and 623 transitions. [2022-01-31 20:42:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:42:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:10,711 INFO L225 Difference]: With dead ends: 485 [2022-01-31 20:42:10,711 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 20:42:10,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:42:10,712 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 159 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:10,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 70 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:42:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 20:42:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-01-31 20:42:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.2896341463414633) internal successors, (423), 328 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 427 transitions. [2022-01-31 20:42:11,058 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 427 transitions. Word has length 102 [2022-01-31 20:42:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:11,058 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 427 transitions. [2022-01-31 20:42:11,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 427 transitions. [2022-01-31 20:42:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:11,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:11,059 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:11,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:42:11,059 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 3 times [2022-01-31 20:42:11,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:11,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377119235] [2022-01-31 20:42:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:11,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:11,060 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:11,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:11,062 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:11,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:11,613 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377119235] [2022-01-31 20:42:11,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377119235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:11,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:11,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:42:11,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310504528] [2022-01-31 20:42:11,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:11,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:42:11,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:11,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:42:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:42:11,614 INFO L87 Difference]: Start difference. First operand 333 states and 427 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:12,630 INFO L93 Difference]: Finished difference Result 485 states and 619 transitions. [2022-01-31 20:42:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:42:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:12,631 INFO L225 Difference]: With dead ends: 485 [2022-01-31 20:42:12,631 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 20:42:12,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:42:12,632 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 117 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:12,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 91 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:42:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 20:42:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-01-31 20:42:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.2835365853658536) internal successors, (421), 328 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 425 transitions. [2022-01-31 20:42:12,992 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 425 transitions. Word has length 102 [2022-01-31 20:42:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:12,992 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 425 transitions. [2022-01-31 20:42:12,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 425 transitions. [2022-01-31 20:42:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:12,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:12,993 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:12,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:42:12,993 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:12,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 4 times [2022-01-31 20:42:12,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:12,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375086195] [2022-01-31 20:42:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:12,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:12,995 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:12,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:12,996 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:14,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:14,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:14,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375086195] [2022-01-31 20:42:14,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375086195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:14,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:14,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:42:14,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024896277] [2022-01-31 20:42:14,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:14,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:42:14,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:42:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:42:14,204 INFO L87 Difference]: Start difference. First operand 333 states and 425 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:15,662 INFO L93 Difference]: Finished difference Result 884 states and 1131 transitions. [2022-01-31 20:42:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:42:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:15,664 INFO L225 Difference]: With dead ends: 884 [2022-01-31 20:42:15,664 INFO L226 Difference]: Without dead ends: 830 [2022-01-31 20:42:15,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:42:15,665 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 261 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:15,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 81 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:42:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-01-31 20:42:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 542. [2022-01-31 20:42:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 537 states have (on average 1.2811918063314711) internal successors, (688), 537 states have internal predecessors, (688), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 692 transitions. [2022-01-31 20:42:16,278 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 692 transitions. Word has length 102 [2022-01-31 20:42:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:16,278 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 692 transitions. [2022-01-31 20:42:16,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 692 transitions. [2022-01-31 20:42:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:16,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:16,279 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:16,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:42:16,279 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 5 times [2022-01-31 20:42:16,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:16,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33260124] [2022-01-31 20:42:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:16,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:16,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:16,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:16,282 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:17,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:17,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:17,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33260124] [2022-01-31 20:42:17,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [33260124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:17,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:17,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:42:17,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556265321] [2022-01-31 20:42:17,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:17,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:42:17,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:42:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:42:17,504 INFO L87 Difference]: Start difference. First operand 542 states and 692 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:19,535 INFO L93 Difference]: Finished difference Result 1201 states and 1524 transitions. [2022-01-31 20:42:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:42:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:19,538 INFO L225 Difference]: With dead ends: 1201 [2022-01-31 20:42:19,538 INFO L226 Difference]: Without dead ends: 1150 [2022-01-31 20:42:19,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:42:19,539 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 378 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:19,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 75 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:42:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-01-31 20:42:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 847. [2022-01-31 20:42:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 842 states have (on average 1.2719714964370545) internal successors, (1071), 842 states have internal predecessors, (1071), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1075 transitions. [2022-01-31 20:42:20,547 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1075 transitions. Word has length 102 [2022-01-31 20:42:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:20,548 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1075 transitions. [2022-01-31 20:42:20,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1075 transitions. [2022-01-31 20:42:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:20,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:20,549 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:20,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:42:20,550 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:20,550 INFO L85 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 6 times [2022-01-31 20:42:20,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:20,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982189094] [2022-01-31 20:42:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:20,551 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:20,551 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:20,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:20,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:21,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:21,724 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:21,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982189094] [2022-01-31 20:42:21,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [982189094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:21,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:21,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:42:21,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962777421] [2022-01-31 20:42:21,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:21,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:42:21,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:42:21,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:42:21,725 INFO L87 Difference]: Start difference. First operand 847 states and 1075 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:25,309 INFO L93 Difference]: Finished difference Result 1405 states and 1773 transitions. [2022-01-31 20:42:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 20:42:25,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:25,313 INFO L225 Difference]: With dead ends: 1405 [2022-01-31 20:42:25,313 INFO L226 Difference]: Without dead ends: 1357 [2022-01-31 20:42:25,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=2398, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:42:25,314 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 151 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:25,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 133 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:42:25,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-01-31 20:42:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1282. [2022-01-31 20:42:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1277 states have (on average 1.2772122161315584) internal successors, (1631), 1277 states have internal predecessors, (1631), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1635 transitions. [2022-01-31 20:42:26,917 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1635 transitions. Word has length 102 [2022-01-31 20:42:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:26,917 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1635 transitions. [2022-01-31 20:42:26,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1635 transitions. [2022-01-31 20:42:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:26,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:26,919 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:26,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:42:26,919 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 7 times [2022-01-31 20:42:26,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:26,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738138474] [2022-01-31 20:42:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:26,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:26,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:26,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:26,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:28,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:28,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:28,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738138474] [2022-01-31 20:42:28,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [738138474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:28,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:28,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:42:28,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870515383] [2022-01-31 20:42:28,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:28,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:42:28,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:28,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:42:28,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:42:28,102 INFO L87 Difference]: Start difference. First operand 1282 states and 1635 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:32,036 INFO L93 Difference]: Finished difference Result 1471 states and 1842 transitions. [2022-01-31 20:42:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:42:32,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:32,040 INFO L225 Difference]: With dead ends: 1471 [2022-01-31 20:42:32,040 INFO L226 Difference]: Without dead ends: 1417 [2022-01-31 20:42:32,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=286, Invalid=3020, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:42:32,041 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 159 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:32,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 143 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:42:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2022-01-31 20:42:33,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1288. [2022-01-31 20:42:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1283 states have (on average 1.2759158222915044) internal successors, (1637), 1283 states have internal predecessors, (1637), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1641 transitions. [2022-01-31 20:42:33,645 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1641 transitions. Word has length 102 [2022-01-31 20:42:33,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:33,645 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 1641 transitions. [2022-01-31 20:42:33,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1641 transitions. [2022-01-31 20:42:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:33,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:33,647 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:33,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 20:42:33,648 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 8 times [2022-01-31 20:42:33,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:33,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346931605] [2022-01-31 20:42:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:33,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:33,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:33,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:33,651 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:34,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:34,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346931605] [2022-01-31 20:42:34,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [346931605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:34,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:34,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:42:34,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157247797] [2022-01-31 20:42:34,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:34,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:42:34,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:42:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:42:34,353 INFO L87 Difference]: Start difference. First operand 1288 states and 1641 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:36,888 INFO L93 Difference]: Finished difference Result 1443 states and 1835 transitions. [2022-01-31 20:42:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:42:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:36,892 INFO L225 Difference]: With dead ends: 1443 [2022-01-31 20:42:36,892 INFO L226 Difference]: Without dead ends: 1352 [2022-01-31 20:42:36,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:42:36,893 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 93 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:36,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 97 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:42:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-01-31 20:42:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1348. [2022-01-31 20:42:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1343 states have (on average 1.2710349962769918) internal successors, (1707), 1343 states have internal predecessors, (1707), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1711 transitions. [2022-01-31 20:42:38,611 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1711 transitions. Word has length 102 [2022-01-31 20:42:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:38,612 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 1711 transitions. [2022-01-31 20:42:38,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1711 transitions. [2022-01-31 20:42:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:38,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:38,614 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:38,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 20:42:38,614 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:38,615 INFO L85 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 9 times [2022-01-31 20:42:38,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:38,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544234275] [2022-01-31 20:42:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:38,616 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:38,616 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:38,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:38,617 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:38,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:38,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:38,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544234275] [2022-01-31 20:42:38,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1544234275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:38,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:38,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:42:38,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415726853] [2022-01-31 20:42:38,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:38,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:42:38,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:42:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:42:38,810 INFO L87 Difference]: Start difference. First operand 1348 states and 1711 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:52,122 INFO L93 Difference]: Finished difference Result 8910 states and 11192 transitions. [2022-01-31 20:42:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:42:52,123 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:42:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:52,143 INFO L225 Difference]: With dead ends: 8910 [2022-01-31 20:42:52,143 INFO L226 Difference]: Without dead ends: 8902 [2022-01-31 20:42:52,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:42:52,146 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:52,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 263 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:42:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8902 states. [2022-01-31 20:42:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8902 to 5460. [2022-01-31 20:42:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5455 states have (on average 1.2676443629697525) internal successors, (6915), 5455 states have internal predecessors, (6915), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 6919 transitions. [2022-01-31 20:42:59,725 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 6919 transitions. Word has length 102 [2022-01-31 20:42:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:59,726 INFO L470 AbstractCegarLoop]: Abstraction has 5460 states and 6919 transitions. [2022-01-31 20:42:59,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 6919 transitions. [2022-01-31 20:42:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:42:59,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:59,733 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:59,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 20:42:59,733 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1408272184, now seen corresponding path program 10 times [2022-01-31 20:42:59,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:59,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704675795] [2022-01-31 20:42:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:59,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:59,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:59,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:59,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:00,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:00,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:00,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704675795] [2022-01-31 20:43:00,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [704675795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:00,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:00,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:43:00,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916827323] [2022-01-31 20:43:00,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:00,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:43:00,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:00,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:43:00,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:43:00,811 INFO L87 Difference]: Start difference. First operand 5460 states and 6919 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:11,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:11,633 INFO L93 Difference]: Finished difference Result 7852 states and 9847 transitions. [2022-01-31 20:43:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:43:11,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:43:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:11,643 INFO L225 Difference]: With dead ends: 7852 [2022-01-31 20:43:11,643 INFO L226 Difference]: Without dead ends: 7424 [2022-01-31 20:43:11,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:43:11,645 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 241 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:11,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 71 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:43:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7424 states. [2022-01-31 20:43:19,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7424 to 5990. [2022-01-31 20:43:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5985 states have (on average 1.2639933166248956) internal successors, (7565), 5985 states have internal predecessors, (7565), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 7569 transitions. [2022-01-31 20:43:19,860 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 7569 transitions. Word has length 102 [2022-01-31 20:43:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:19,860 INFO L470 AbstractCegarLoop]: Abstraction has 5990 states and 7569 transitions. [2022-01-31 20:43:19,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 7569 transitions. [2022-01-31 20:43:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:43:19,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:19,867 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:19,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 20:43:19,867 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:19,868 INFO L85 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 11 times [2022-01-31 20:43:19,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:19,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916855886] [2022-01-31 20:43:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:19,869 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:19,869 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:19,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:19,870 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:20,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:20,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916855886] [2022-01-31 20:43:20,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1916855886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:20,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:20,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:43:20,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459843253] [2022-01-31 20:43:20,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:20,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:43:20,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:43:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:43:20,414 INFO L87 Difference]: Start difference. First operand 5990 states and 7569 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:30,016 INFO L93 Difference]: Finished difference Result 9084 states and 11406 transitions. [2022-01-31 20:43:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:43:30,017 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:43:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:30,028 INFO L225 Difference]: With dead ends: 9084 [2022-01-31 20:43:30,029 INFO L226 Difference]: Without dead ends: 6544 [2022-01-31 20:43:30,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:43:30,034 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:30,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:43:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6544 states. [2022-01-31 20:43:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6544 to 6464. [2022-01-31 20:43:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6464 states, 6459 states have (on average 1.2563864375290292) internal successors, (8115), 6459 states have internal predecessors, (8115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6464 states to 6464 states and 8119 transitions. [2022-01-31 20:43:39,081 INFO L78 Accepts]: Start accepts. Automaton has 6464 states and 8119 transitions. Word has length 102 [2022-01-31 20:43:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:39,081 INFO L470 AbstractCegarLoop]: Abstraction has 6464 states and 8119 transitions. [2022-01-31 20:43:39,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 6464 states and 8119 transitions. [2022-01-31 20:43:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:43:39,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:39,090 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:39,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 20:43:39,090 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1954191478, now seen corresponding path program 12 times [2022-01-31 20:43:39,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:39,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588251712] [2022-01-31 20:43:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:39,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:39,092 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:39,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:39,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:39,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:39,591 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:39,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588251712] [2022-01-31 20:43:39,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588251712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:39,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:39,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:43:39,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226641175] [2022-01-31 20:43:39,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:39,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:43:39,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:43:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:43:39,592 INFO L87 Difference]: Start difference. First operand 6464 states and 8119 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:50,420 INFO L93 Difference]: Finished difference Result 11633 states and 14626 transitions. [2022-01-31 20:43:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:43:50,420 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:43:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:50,431 INFO L225 Difference]: With dead ends: 11633 [2022-01-31 20:43:50,431 INFO L226 Difference]: Without dead ends: 7252 [2022-01-31 20:43:50,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:43:50,438 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 186 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:50,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 77 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:43:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7252 states. [2022-01-31 20:44:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7252 to 7076. [2022-01-31 20:44:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7071 states have (on average 1.2562579550275774) internal successors, (8883), 7071 states have internal predecessors, (8883), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 8887 transitions. [2022-01-31 20:44:00,288 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 8887 transitions. Word has length 102 [2022-01-31 20:44:00,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:00,288 INFO L470 AbstractCegarLoop]: Abstraction has 7076 states and 8887 transitions. [2022-01-31 20:44:00,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 8887 transitions. [2022-01-31 20:44:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:44:00,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:00,295 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:00,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 20:44:00,296 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 367108234, now seen corresponding path program 13 times [2022-01-31 20:44:00,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485773726] [2022-01-31 20:44:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:00,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:00,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:00,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:00,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:02,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:02,090 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:02,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485773726] [2022-01-31 20:44:02,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [485773726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:02,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:02,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:44:02,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569990472] [2022-01-31 20:44:02,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:02,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:44:02,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:44:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:44:02,092 INFO L87 Difference]: Start difference. First operand 7076 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:20,029 INFO L93 Difference]: Finished difference Result 11163 states and 14041 transitions. [2022-01-31 20:44:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:44:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:44:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:20,042 INFO L225 Difference]: With dead ends: 11163 [2022-01-31 20:44:20,042 INFO L226 Difference]: Without dead ends: 10928 [2022-01-31 20:44:20,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=488, Invalid=2818, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:44:20,044 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 321 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:20,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 110 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:44:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10928 states. [2022-01-31 20:44:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 6768. [2022-01-31 20:44:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6768 states, 6763 states have (on average 1.2550643205677954) internal successors, (8488), 6763 states have internal predecessors, (8488), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6768 states to 6768 states and 8492 transitions. [2022-01-31 20:44:29,834 INFO L78 Accepts]: Start accepts. Automaton has 6768 states and 8492 transitions. Word has length 102 [2022-01-31 20:44:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:29,835 INFO L470 AbstractCegarLoop]: Abstraction has 6768 states and 8492 transitions. [2022-01-31 20:44:29,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 6768 states and 8492 transitions. [2022-01-31 20:44:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:44:29,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:29,841 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:29,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 20:44:29,842 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash -25918776, now seen corresponding path program 14 times [2022-01-31 20:44:29,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:29,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535979820] [2022-01-31 20:44:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:29,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:29,843 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:29,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:29,845 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:30,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:30,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535979820] [2022-01-31 20:44:30,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1535979820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:30,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:30,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:44:30,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534204806] [2022-01-31 20:44:30,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:30,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:44:30,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:44:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:44:30,253 INFO L87 Difference]: Start difference. First operand 6768 states and 8492 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:39,471 INFO L93 Difference]: Finished difference Result 10663 states and 13350 transitions. [2022-01-31 20:44:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:44:39,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:44:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:39,477 INFO L225 Difference]: With dead ends: 10663 [2022-01-31 20:44:39,477 INFO L226 Difference]: Without dead ends: 5950 [2022-01-31 20:44:39,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:44:39,483 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 178 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:39,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 65 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:44:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5950 states. [2022-01-31 20:44:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5950 to 5932. [2022-01-31 20:44:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5932 states, 5927 states have (on average 1.2436308419099038) internal successors, (7371), 5927 states have internal predecessors, (7371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5932 states to 5932 states and 7375 transitions. [2022-01-31 20:44:48,196 INFO L78 Accepts]: Start accepts. Automaton has 5932 states and 7375 transitions. Word has length 102 [2022-01-31 20:44:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:48,196 INFO L470 AbstractCegarLoop]: Abstraction has 5932 states and 7375 transitions. [2022-01-31 20:44:48,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5932 states and 7375 transitions. [2022-01-31 20:44:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:44:48,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:48,201 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:48,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 20:44:48,201 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1731275972, now seen corresponding path program 15 times [2022-01-31 20:44:48,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:48,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911775892] [2022-01-31 20:44:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:48,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:48,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:48,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:48,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:48,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:48,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:48,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911775892] [2022-01-31 20:44:48,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [911775892] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:48,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:48,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:44:48,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073781447] [2022-01-31 20:44:48,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:48,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:44:48,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:48,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:44:48,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:44:48,702 INFO L87 Difference]: Start difference. First operand 5932 states and 7375 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:58,142 INFO L93 Difference]: Finished difference Result 10052 states and 12477 transitions. [2022-01-31 20:44:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:44:58,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:44:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:58,148 INFO L225 Difference]: With dead ends: 10052 [2022-01-31 20:44:58,148 INFO L226 Difference]: Without dead ends: 5960 [2022-01-31 20:44:58,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:44:58,156 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 118 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:58,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 78 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:44:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2022-01-31 20:45:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 5764. [2022-01-31 20:45:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5764 states, 5759 states have (on average 1.2410140649418302) internal successors, (7147), 5759 states have internal predecessors, (7147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5764 states to 5764 states and 7151 transitions. [2022-01-31 20:45:06,826 INFO L78 Accepts]: Start accepts. Automaton has 5764 states and 7151 transitions. Word has length 102 [2022-01-31 20:45:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:06,826 INFO L470 AbstractCegarLoop]: Abstraction has 5764 states and 7151 transitions. [2022-01-31 20:45:06,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 5764 states and 7151 transitions. [2022-01-31 20:45:06,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:45:06,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:06,832 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:06,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 20:45:06,832 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:06,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1715757254, now seen corresponding path program 16 times [2022-01-31 20:45:06,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:06,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424519121] [2022-01-31 20:45:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:06,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:06,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:06,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:06,835 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:08,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:08,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:08,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424519121] [2022-01-31 20:45:08,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1424519121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:08,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:08,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:45:08,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221046283] [2022-01-31 20:45:08,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:08,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:45:08,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:08,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:45:08,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:45:08,078 INFO L87 Difference]: Start difference. First operand 5764 states and 7151 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:17,589 INFO L93 Difference]: Finished difference Result 7720 states and 9603 transitions. [2022-01-31 20:45:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 20:45:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:45:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:17,595 INFO L225 Difference]: With dead ends: 7720 [2022-01-31 20:45:17,596 INFO L226 Difference]: Without dead ends: 5416 [2022-01-31 20:45:17,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1440, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:45:17,598 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 252 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:17,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 85 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:45:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2022-01-31 20:45:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 4612. [2022-01-31 20:45:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4607 states have (on average 1.2326893857173866) internal successors, (5679), 4607 states have internal predecessors, (5679), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 5683 transitions. [2022-01-31 20:45:24,518 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 5683 transitions. Word has length 102 [2022-01-31 20:45:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:24,518 INFO L470 AbstractCegarLoop]: Abstraction has 4612 states and 5683 transitions. [2022-01-31 20:45:24,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 5683 transitions. [2022-01-31 20:45:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:45:24,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:24,523 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:24,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 20:45:24,523 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:24,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1793090178, now seen corresponding path program 17 times [2022-01-31 20:45:24,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:24,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303981525] [2022-01-31 20:45:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:24,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:24,525 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:24,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:24,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:25,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:25,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303981525] [2022-01-31 20:45:25,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [303981525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:25,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:25,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:45:25,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117072834] [2022-01-31 20:45:25,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:25,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:45:25,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:45:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:45:25,565 INFO L87 Difference]: Start difference. First operand 4612 states and 5683 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:38,786 INFO L93 Difference]: Finished difference Result 7888 states and 9707 transitions. [2022-01-31 20:45:38,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:45:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:45:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:38,794 INFO L225 Difference]: With dead ends: 7888 [2022-01-31 20:45:38,794 INFO L226 Difference]: Without dead ends: 7485 [2022-01-31 20:45:38,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=2301, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:45:38,796 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 169 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:38,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 133 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:45:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7485 states. [2022-01-31 20:45:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7485 to 7166. [2022-01-31 20:45:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7166 states, 7161 states have (on average 1.2343248149699764) internal successors, (8839), 7161 states have internal predecessors, (8839), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7166 states to 7166 states and 8843 transitions. [2022-01-31 20:45:49,611 INFO L78 Accepts]: Start accepts. Automaton has 7166 states and 8843 transitions. Word has length 102 [2022-01-31 20:45:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:49,612 INFO L470 AbstractCegarLoop]: Abstraction has 7166 states and 8843 transitions. [2022-01-31 20:45:49,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 7166 states and 8843 transitions. [2022-01-31 20:45:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:45:49,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:49,617 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:49,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 20:45:49,618 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash 104146436, now seen corresponding path program 18 times [2022-01-31 20:45:49,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:49,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914177906] [2022-01-31 20:45:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:49,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:49,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:49,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:49,621 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:50,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:50,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914177906] [2022-01-31 20:45:50,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [914177906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:50,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:50,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:45:50,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176917404] [2022-01-31 20:45:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:50,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:45:50,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:45:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:45:50,710 INFO L87 Difference]: Start difference. First operand 7166 states and 8843 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:04,782 INFO L93 Difference]: Finished difference Result 8290 states and 10128 transitions. [2022-01-31 20:46:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:46:04,783 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:46:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:04,791 INFO L225 Difference]: With dead ends: 8290 [2022-01-31 20:46:04,791 INFO L226 Difference]: Without dead ends: 7851 [2022-01-31 20:46:04,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:46:04,793 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 173 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:04,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 135 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:46:04,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2022-01-31 20:46:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 7223. [2022-01-31 20:46:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7223 states, 7218 states have (on average 1.2324743696314768) internal successors, (8896), 7218 states have internal predecessors, (8896), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7223 states to 7223 states and 8900 transitions. [2022-01-31 20:46:15,613 INFO L78 Accepts]: Start accepts. Automaton has 7223 states and 8900 transitions. Word has length 102 [2022-01-31 20:46:15,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:15,614 INFO L470 AbstractCegarLoop]: Abstraction has 7223 states and 8900 transitions. [2022-01-31 20:46:15,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand 7223 states and 8900 transitions. [2022-01-31 20:46:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:46:15,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:15,619 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:15,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 20:46:15,619 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 19 times [2022-01-31 20:46:15,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:15,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916703193] [2022-01-31 20:46:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:15,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:46:15,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:46:15,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:15,622 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:46:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:16,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:46:16,226 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:16,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916703193] [2022-01-31 20:46:16,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [916703193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:16,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:16,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:46:16,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728367216] [2022-01-31 20:46:16,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:16,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:46:16,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:16,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:46:16,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:46:16,227 INFO L87 Difference]: Start difference. First operand 7223 states and 8900 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:28,910 INFO L93 Difference]: Finished difference Result 8394 states and 10377 transitions. [2022-01-31 20:46:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:46:28,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:46:28,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:28,920 INFO L225 Difference]: With dead ends: 8394 [2022-01-31 20:46:28,920 INFO L226 Difference]: Without dead ends: 7581 [2022-01-31 20:46:28,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:46:28,923 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 103 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:28,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 95 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:46:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2022-01-31 20:46:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 7175. [2022-01-31 20:46:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7175 states, 7170 states have (on average 1.2348675034867505) internal successors, (8854), 7170 states have internal predecessors, (8854), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:39,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 8858 transitions. [2022-01-31 20:46:39,825 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 8858 transitions. Word has length 102 [2022-01-31 20:46:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:39,825 INFO L470 AbstractCegarLoop]: Abstraction has 7175 states and 8858 transitions. [2022-01-31 20:46:39,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 8858 transitions. [2022-01-31 20:46:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:46:39,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:39,830 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:39,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 20:46:39,830 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1933638788, now seen corresponding path program 20 times [2022-01-31 20:46:39,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202456215] [2022-01-31 20:46:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:39,831 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:46:39,832 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:46:39,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:39,833 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:46:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:40,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:46:40,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:40,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202456215] [2022-01-31 20:46:40,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [202456215] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:40,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:40,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:46:40,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798056445] [2022-01-31 20:46:40,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:40,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:46:40,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:46:40,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:46:40,297 INFO L87 Difference]: Start difference. First operand 7175 states and 8858 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:52,417 INFO L93 Difference]: Finished difference Result 8174 states and 10142 transitions. [2022-01-31 20:46:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:46:52,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:46:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:52,425 INFO L225 Difference]: With dead ends: 8174 [2022-01-31 20:46:52,425 INFO L226 Difference]: Without dead ends: 7343 [2022-01-31 20:46:52,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:46:52,427 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 161 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:52,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 89 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:46:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2022-01-31 20:47:03,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 7277. [2022-01-31 20:47:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7277 states, 7272 states have (on average 1.2315731573157316) internal successors, (8956), 7272 states have internal predecessors, (8956), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7277 states to 7277 states and 8960 transitions. [2022-01-31 20:47:03,684 INFO L78 Accepts]: Start accepts. Automaton has 7277 states and 8960 transitions. Word has length 102 [2022-01-31 20:47:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:03,685 INFO L470 AbstractCegarLoop]: Abstraction has 7277 states and 8960 transitions. [2022-01-31 20:47:03,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7277 states and 8960 transitions. [2022-01-31 20:47:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:47:03,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:03,689 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:03,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 20:47:03,689 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:03,690 INFO L85 PathProgramCache]: Analyzing trace with hash 912570434, now seen corresponding path program 21 times [2022-01-31 20:47:03,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:03,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190621414] [2022-01-31 20:47:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:03,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:47:03,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:47:03,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:03,693 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:47:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:05,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:47:05,025 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190621414] [2022-01-31 20:47:05,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [190621414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:05,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:05,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:47:05,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073788853] [2022-01-31 20:47:05,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:05,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:47:05,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:47:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:47:05,027 INFO L87 Difference]: Start difference. First operand 7277 states and 8960 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:18,710 INFO L93 Difference]: Finished difference Result 9268 states and 11430 transitions. [2022-01-31 20:47:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:47:18,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:47:18,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:18,718 INFO L225 Difference]: With dead ends: 9268 [2022-01-31 20:47:18,719 INFO L226 Difference]: Without dead ends: 7552 [2022-01-31 20:47:18,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:47:18,721 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 286 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:18,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 84 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:47:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7552 states. [2022-01-31 20:47:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7552 to 6588. [2022-01-31 20:47:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6588 states, 6583 states have (on average 1.228619170590916) internal successors, (8088), 6583 states have internal predecessors, (8088), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 8092 transitions. [2022-01-31 20:47:28,853 INFO L78 Accepts]: Start accepts. Automaton has 6588 states and 8092 transitions. Word has length 102 [2022-01-31 20:47:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:28,854 INFO L470 AbstractCegarLoop]: Abstraction has 6588 states and 8092 transitions. [2022-01-31 20:47:28,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6588 states and 8092 transitions. [2022-01-31 20:47:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:47:28,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:28,858 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:28,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 20:47:28,858 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 22 times [2022-01-31 20:47:28,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:28,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060517910] [2022-01-31 20:47:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:28,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:47:28,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:47:28,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:28,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:47:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:29,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:47:29,445 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060517910] [2022-01-31 20:47:29,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2060517910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:29,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:29,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:47:29,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680216560] [2022-01-31 20:47:29,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:29,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:47:29,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:47:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:47:29,446 INFO L87 Difference]: Start difference. First operand 6588 states and 8092 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:40,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:40,605 INFO L93 Difference]: Finished difference Result 9459 states and 11588 transitions. [2022-01-31 20:47:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:47:40,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:47:40,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:40,612 INFO L225 Difference]: With dead ends: 9459 [2022-01-31 20:47:40,612 INFO L226 Difference]: Without dead ends: 6932 [2022-01-31 20:47:40,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:47:40,616 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 82 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:40,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 64 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:47:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2022-01-31 20:47:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6726. [2022-01-31 20:47:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6726 states, 6721 states have (on average 1.223032286862074) internal successors, (8220), 6721 states have internal predecessors, (8220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 8224 transitions. [2022-01-31 20:47:50,968 INFO L78 Accepts]: Start accepts. Automaton has 6726 states and 8224 transitions. Word has length 102 [2022-01-31 20:47:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:50,968 INFO L470 AbstractCegarLoop]: Abstraction has 6726 states and 8224 transitions. [2022-01-31 20:47:50,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6726 states and 8224 transitions. [2022-01-31 20:47:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:47:50,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:50,972 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:50,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 20:47:50,972 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1370592888, now seen corresponding path program 23 times [2022-01-31 20:47:50,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:50,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734213751] [2022-01-31 20:47:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:50,973 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:47:50,973 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:47:50,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:50,975 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:47:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:51,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:47:51,241 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:51,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734213751] [2022-01-31 20:47:51,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [734213751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:51,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:51,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:47:51,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475696324] [2022-01-31 20:47:51,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:51,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:47:51,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:47:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:47:51,242 INFO L87 Difference]: Start difference. First operand 6726 states and 8224 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 17 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:24,176 INFO L93 Difference]: Finished difference Result 18821 states and 23010 transitions. [2022-01-31 20:48:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 20:48:24,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 17 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:48:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:24,195 INFO L225 Difference]: With dead ends: 18821 [2022-01-31 20:48:24,195 INFO L226 Difference]: Without dead ends: 18815 [2022-01-31 20:48:24,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=2838, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 20:48:24,199 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 599 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5393 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 5477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 5393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:24,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 421 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 5393 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 20:48:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18815 states. [2022-01-31 20:48:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18815 to 9398. [2022-01-31 20:48:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9393 states have (on average 1.2213350367294793) internal successors, (11472), 9393 states have internal predecessors, (11472), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 11476 transitions. [2022-01-31 20:48:39,092 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 11476 transitions. Word has length 102 [2022-01-31 20:48:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:39,092 INFO L470 AbstractCegarLoop]: Abstraction has 9398 states and 11476 transitions. [2022-01-31 20:48:39,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 17 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 11476 transitions. [2022-01-31 20:48:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:48:39,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:39,098 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:39,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 20:48:39,098 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1957398902, now seen corresponding path program 24 times [2022-01-31 20:48:39,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:39,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479310871] [2022-01-31 20:48:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:39,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:39,100 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:39,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:39,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:39,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:39,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:39,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479310871] [2022-01-31 20:48:39,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479310871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:39,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:39,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:48:39,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461664252] [2022-01-31 20:48:39,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:39,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:48:39,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:48:39,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:48:39,563 INFO L87 Difference]: Start difference. First operand 9398 states and 11476 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:56,160 INFO L93 Difference]: Finished difference Result 16639 states and 20434 transitions. [2022-01-31 20:48:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:48:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:48:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:56,171 INFO L225 Difference]: With dead ends: 16639 [2022-01-31 20:48:56,171 INFO L226 Difference]: Without dead ends: 10042 [2022-01-31 20:48:56,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:48:56,179 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 125 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:56,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 95 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:48:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10042 states. [2022-01-31 20:49:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10042 to 9791. [2022-01-31 20:49:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9791 states, 9786 states have (on average 1.2218475372981812) internal successors, (11957), 9786 states have internal predecessors, (11957), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9791 states to 9791 states and 11961 transitions. [2022-01-31 20:49:11,636 INFO L78 Accepts]: Start accepts. Automaton has 9791 states and 11961 transitions. Word has length 102 [2022-01-31 20:49:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:11,636 INFO L470 AbstractCegarLoop]: Abstraction has 9791 states and 11961 transitions. [2022-01-31 20:49:11,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 9791 states and 11961 transitions. [2022-01-31 20:49:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:49:11,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:11,642 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:11,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 20:49:11,642 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:11,643 INFO L85 PathProgramCache]: Analyzing trace with hash 950706824, now seen corresponding path program 25 times [2022-01-31 20:49:11,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:11,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487500391] [2022-01-31 20:49:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:11,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:11,644 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:11,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:11,646 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:13,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:49:13,604 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:13,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487500391] [2022-01-31 20:49:13,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [487500391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:13,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:13,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:49:13,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381123525] [2022-01-31 20:49:13,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:13,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:49:13,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:49:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:49:13,605 INFO L87 Difference]: Start difference. First operand 9791 states and 11961 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:36,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:36,182 INFO L93 Difference]: Finished difference Result 12814 states and 15777 transitions. [2022-01-31 20:49:36,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:49:36,182 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:49:36,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:36,196 INFO L225 Difference]: With dead ends: 12814 [2022-01-31 20:49:36,196 INFO L226 Difference]: Without dead ends: 12448 [2022-01-31 20:49:36,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=525, Invalid=3135, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:49:36,200 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 399 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:36,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 90 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:49:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12448 states. [2022-01-31 20:49:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12448 to 9464. [2022-01-31 20:49:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9464 states, 9459 states have (on average 1.2216936251189343) internal successors, (11556), 9459 states have internal predecessors, (11556), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9464 states to 9464 states and 11560 transitions. [2022-01-31 20:49:51,385 INFO L78 Accepts]: Start accepts. Automaton has 9464 states and 11560 transitions. Word has length 102 [2022-01-31 20:49:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:51,385 INFO L470 AbstractCegarLoop]: Abstraction has 9464 states and 11560 transitions. [2022-01-31 20:49:51,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 9464 states and 11560 transitions. [2022-01-31 20:49:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:49:51,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:51,391 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:51,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 20:49:51,391 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:51,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:51,392 INFO L85 PathProgramCache]: Analyzing trace with hash 557679814, now seen corresponding path program 26 times [2022-01-31 20:49:51,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:51,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220725516] [2022-01-31 20:49:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:51,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:51,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:51,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:51,394 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:51,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:49:51,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220725516] [2022-01-31 20:49:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1220725516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:51,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:51,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:49:51,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712444367] [2022-01-31 20:49:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:51,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:49:51,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:49:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:49:51,941 INFO L87 Difference]: Start difference. First operand 9464 states and 11560 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:08,329 INFO L93 Difference]: Finished difference Result 16360 states and 20045 transitions. [2022-01-31 20:50:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:50:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:50:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:08,339 INFO L225 Difference]: With dead ends: 16360 [2022-01-31 20:50:08,339 INFO L226 Difference]: Without dead ends: 9517 [2022-01-31 20:50:08,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:50:08,346 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:08,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 73 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:50:08,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2022-01-31 20:50:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 9305. [2022-01-31 20:50:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9305 states, 9300 states have (on average 1.2167741935483871) internal successors, (11316), 9300 states have internal predecessors, (11316), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9305 states to 9305 states and 11320 transitions. [2022-01-31 20:50:23,212 INFO L78 Accepts]: Start accepts. Automaton has 9305 states and 11320 transitions. Word has length 102 [2022-01-31 20:50:23,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:23,212 INFO L470 AbstractCegarLoop]: Abstraction has 9305 states and 11320 transitions. [2022-01-31 20:50:23,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 9305 states and 11320 transitions. [2022-01-31 20:50:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:50:23,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:23,218 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:23,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 20:50:23,218 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:23,218 INFO L85 PathProgramCache]: Analyzing trace with hash 542161096, now seen corresponding path program 27 times [2022-01-31 20:50:23,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:23,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313110681] [2022-01-31 20:50:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:23,219 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:23,219 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:23,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:23,221 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:24,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:50:24,776 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:24,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313110681] [2022-01-31 20:50:24,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [313110681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:24,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:24,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:50:24,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705271383] [2022-01-31 20:50:24,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:24,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:50:24,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:50:24,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:50:24,777 INFO L87 Difference]: Start difference. First operand 9305 states and 11320 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:46,260 INFO L93 Difference]: Finished difference Result 13535 states and 16601 transitions. [2022-01-31 20:50:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:50:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:50:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:46,272 INFO L225 Difference]: With dead ends: 13535 [2022-01-31 20:50:46,272 INFO L226 Difference]: Without dead ends: 11969 [2022-01-31 20:50:46,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=522, Invalid=2784, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:50:46,275 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 326 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:46,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 83 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:50:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11969 states. [2022-01-31 20:51:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11969 to 10006. [2022-01-31 20:51:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10006 states, 10001 states have (on average 1.2128787121287872) internal successors, (12130), 10001 states have internal predecessors, (12130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:02,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10006 states to 10006 states and 12134 transitions. [2022-01-31 20:51:02,348 INFO L78 Accepts]: Start accepts. Automaton has 10006 states and 12134 transitions. Word has length 102 [2022-01-31 20:51:02,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:02,348 INFO L470 AbstractCegarLoop]: Abstraction has 10006 states and 12134 transitions. [2022-01-31 20:51:02,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 10006 states and 12134 transitions. [2022-01-31 20:51:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:51:02,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:02,356 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:02,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 20:51:02,356 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash -125714292, now seen corresponding path program 28 times [2022-01-31 20:51:02,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:02,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616250487] [2022-01-31 20:51:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:02,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:02,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:02,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:02,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:03,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:51:03,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616250487] [2022-01-31 20:51:03,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [616250487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:03,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:03,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:51:03,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927955909] [2022-01-31 20:51:03,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:03,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:51:03,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:03,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:51:03,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:51:03,797 INFO L87 Difference]: Start difference. First operand 10006 states and 12134 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:32,615 INFO L93 Difference]: Finished difference Result 18140 states and 22154 transitions. [2022-01-31 20:51:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:51:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:51:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:32,636 INFO L225 Difference]: With dead ends: 18140 [2022-01-31 20:51:32,636 INFO L226 Difference]: Without dead ends: 16586 [2022-01-31 20:51:32,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:51:32,641 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 387 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:32,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 69 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:51:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16586 states. [2022-01-31 20:51:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16586 to 12772. [2022-01-31 20:51:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12772 states, 12767 states have (on average 1.2127359598966085) internal successors, (15483), 12767 states have internal predecessors, (15483), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12772 states to 12772 states and 15487 transitions. [2022-01-31 20:51:53,383 INFO L78 Accepts]: Start accepts. Automaton has 12772 states and 15487 transitions. Word has length 102 [2022-01-31 20:51:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:53,383 INFO L470 AbstractCegarLoop]: Abstraction has 12772 states and 15487 transitions. [2022-01-31 20:51:53,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 12772 states and 15487 transitions. [2022-01-31 20:51:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:51:53,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:53,391 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:53,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 20:51:53,391 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:53,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 29 times [2022-01-31 20:51:53,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:53,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939000514] [2022-01-31 20:51:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:53,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:53,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:53,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:53,394 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:55,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:51:55,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:55,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939000514] [2022-01-31 20:51:55,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [939000514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:55,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:55,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:51:55,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412025329] [2022-01-31 20:51:55,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:55,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:51:55,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:55,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:51:55,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:51:55,184 INFO L87 Difference]: Start difference. First operand 12772 states and 15487 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:23,052 INFO L93 Difference]: Finished difference Result 15697 states and 19152 transitions. [2022-01-31 20:52:23,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:52:23,052 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:52:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:23,072 INFO L225 Difference]: With dead ends: 15697 [2022-01-31 20:52:23,072 INFO L226 Difference]: Without dead ends: 15310 [2022-01-31 20:52:23,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=498, Invalid=2924, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:52:23,075 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 296 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:52:23,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 122 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:52:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15310 states. [2022-01-31 20:52:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15310 to 13545. [2022-01-31 20:52:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13545 states, 13540 states have (on average 1.210192023633678) internal successors, (16386), 13540 states have internal predecessors, (16386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13545 states to 13545 states and 16390 transitions. [2022-01-31 20:52:45,433 INFO L78 Accepts]: Start accepts. Automaton has 13545 states and 16390 transitions. Word has length 102 [2022-01-31 20:52:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:45,433 INFO L470 AbstractCegarLoop]: Abstraction has 13545 states and 16390 transitions. [2022-01-31 20:52:45,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 13545 states and 16390 transitions. [2022-01-31 20:52:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:52:45,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:45,441 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:45,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 20:52:45,441 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 30 times [2022-01-31 20:52:45,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:45,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879673507] [2022-01-31 20:52:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:45,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:52:45,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:52:45,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:45,444 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:52:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:52:46,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:46,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879673507] [2022-01-31 20:52:46,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [879673507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:46,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:46,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:52:46,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869361596] [2022-01-31 20:52:46,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:46,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:52:46,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:52:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:52:46,666 INFO L87 Difference]: Start difference. First operand 13545 states and 16390 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:16,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:16,665 INFO L93 Difference]: Finished difference Result 18967 states and 23116 transitions. [2022-01-31 20:53:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:53:16,666 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:53:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:16,686 INFO L225 Difference]: With dead ends: 18967 [2022-01-31 20:53:16,687 INFO L226 Difference]: Without dead ends: 16977 [2022-01-31 20:53:16,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:53:16,693 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 306 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:16,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 62 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:53:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16977 states. [2022-01-31 20:53:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16977 to 13500. [2022-01-31 20:53:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13500 states, 13495 states have (on average 1.2061504260837348) internal successors, (16277), 13495 states have internal predecessors, (16277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13500 states to 13500 states and 16281 transitions. [2022-01-31 20:53:39,544 INFO L78 Accepts]: Start accepts. Automaton has 13500 states and 16281 transitions. Word has length 102 [2022-01-31 20:53:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:39,544 INFO L470 AbstractCegarLoop]: Abstraction has 13500 states and 16281 transitions. [2022-01-31 20:53:39,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 13500 states and 16281 transitions. [2022-01-31 20:53:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:53:39,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:39,551 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:39,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 20:53:39,551 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 31 times [2022-01-31 20:53:39,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975724913] [2022-01-31 20:53:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:39,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:39,553 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:39,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:39,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:40,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:53:40,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:40,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975724913] [2022-01-31 20:53:40,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [975724913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:40,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:40,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:53:40,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582712816] [2022-01-31 20:53:40,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:40,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:53:40,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:53:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:53:40,097 INFO L87 Difference]: Start difference. First operand 13500 states and 16281 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:05,190 INFO L93 Difference]: Finished difference Result 23106 states and 27909 transitions. [2022-01-31 20:54:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:54:05,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:54:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:05,205 INFO L225 Difference]: With dead ends: 23106 [2022-01-31 20:54:05,206 INFO L226 Difference]: Without dead ends: 14523 [2022-01-31 20:54:05,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:54:05,216 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:05,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 77 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:54:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14523 states. [2022-01-31 20:54:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14523 to 14382. [2022-01-31 20:54:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14382 states, 14377 states have (on average 1.1969117340196147) internal successors, (17208), 14377 states have internal predecessors, (17208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 17212 transitions. [2022-01-31 20:54:29,289 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 17212 transitions. Word has length 102 [2022-01-31 20:54:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:29,289 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 17212 transitions. [2022-01-31 20:54:29,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 17212 transitions. [2022-01-31 20:54:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:54:29,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:29,300 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:29,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 20:54:29,300 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash -200204154, now seen corresponding path program 32 times [2022-01-31 20:54:29,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:29,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240682553] [2022-01-31 20:54:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:29,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:29,302 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:29,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:29,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:29,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:54:29,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:29,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240682553] [2022-01-31 20:54:29,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240682553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:29,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:29,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:54:29,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382781642] [2022-01-31 20:54:29,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:29,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:54:29,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:29,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:54:29,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:54:29,734 INFO L87 Difference]: Start difference. First operand 14382 states and 17212 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:53,834 INFO L93 Difference]: Finished difference Result 23936 states and 28750 transitions. [2022-01-31 20:54:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:54:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:54:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:53,851 INFO L225 Difference]: With dead ends: 23936 [2022-01-31 20:54:53,851 INFO L226 Difference]: Without dead ends: 14005 [2022-01-31 20:54:53,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:54:53,864 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:53,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 73 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:54:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14005 states. [2022-01-31 20:55:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14005 to 13640. [2022-01-31 20:55:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13640 states, 13635 states have (on average 1.1966263292995967) internal successors, (16316), 13635 states have internal predecessors, (16316), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13640 states to 13640 states and 16320 transitions. [2022-01-31 20:55:17,115 INFO L78 Accepts]: Start accepts. Automaton has 13640 states and 16320 transitions. Word has length 102 [2022-01-31 20:55:17,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:17,115 INFO L470 AbstractCegarLoop]: Abstraction has 13640 states and 16320 transitions. [2022-01-31 20:55:17,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 13640 states and 16320 transitions. [2022-01-31 20:55:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:55:17,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:17,122 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:17,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 20:55:17,122 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 33 times [2022-01-31 20:55:17,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:17,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847979122] [2022-01-31 20:55:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:17,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:17,124 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:17,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:17,125 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:18,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:55:19,001 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:19,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847979122] [2022-01-31 20:55:19,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847979122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:19,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:19,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:55:19,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608922157] [2022-01-31 20:55:19,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:19,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:55:19,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:55:19,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:55:19,002 INFO L87 Difference]: Start difference. First operand 13640 states and 16320 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)