/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-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:27:21,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:27:21,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:27:21,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:27:21,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:27:21,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:27:21,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:27:21,637 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 21:27:21,649 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:27:21,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:27:21,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:27:21,651 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:27:21,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:27:21,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:27:21,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:27:21,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:27:21,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:27:21,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:27:21,652 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:27:21,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:27:21,652 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:27:21,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:27:21,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:27:21,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:27:21,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:27:21,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:27:21,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:27:21,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:27:21,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:27:21,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:27:21,653 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:27:21,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:27:21,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:27:21,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:27:21,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:27:21,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:27:21,836 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:27:21,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-01-31 21:27:21,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d51d4339/e961f58cc45a499d853043320fe09c56/FLAGa733d50ce [2022-01-31 21:27:22,262 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:27:22,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-01-31 21:27:22,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d51d4339/e961f58cc45a499d853043320fe09c56/FLAGa733d50ce [2022-01-31 21:27:22,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d51d4339/e961f58cc45a499d853043320fe09c56 [2022-01-31 21:27:22,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:27:22,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:27:22,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:27:22,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:27:22,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:27:22,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c059927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22, skipping insertion in model container [2022-01-31 21:27:22,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:27:22,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:27:22,451 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-crafted-1/mono-crafted_7.c[318,331] [2022-01-31 21:27:22,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:27:22,479 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:27:22,486 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-crafted-1/mono-crafted_7.c[318,331] [2022-01-31 21:27:22,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:27:22,502 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:27:22,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22 WrapperNode [2022-01-31 21:27:22,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:27:22,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:27:22,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:27:22,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:27:22,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:27:22,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:27:22,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:27:22,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:27:22,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22" (1/1) ... [2022-01-31 21:27:22,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:27:22,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:27:22,547 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 21:27:22,566 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 21:27:22,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:27:22,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:27:22,581 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:27:22,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:27:22,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:27:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:27:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:27:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:27:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:27:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:27:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:27:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:27:22,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:27:22,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:27:22,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:27:22,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:27:22,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:27:22,620 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:27:22,621 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:27:22,688 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:27:22,691 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:27:22,691 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 21:27:22,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:27:22 BoogieIcfgContainer [2022-01-31 21:27:22,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:27:22,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:27:22,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:27:22,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:27:22,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:27:22" (1/3) ... [2022-01-31 21:27:22,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac2f745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:27:22, skipping insertion in model container [2022-01-31 21:27:22,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:22" (2/3) ... [2022-01-31 21:27:22,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac2f745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:27:22, skipping insertion in model container [2022-01-31 21:27:22,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:27:22" (3/3) ... [2022-01-31 21:27:22,723 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2022-01-31 21:27:22,726 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:27:22,726 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:27:22,751 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:27:22,756 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 21:27:22,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:27:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 21:27:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 21:27:22,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:22,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:22,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-01-31 21:27:22,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:22,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315004566] [2022-01-31 21:27:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:22,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:22,854 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:22,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:22,968 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 21:27:22,969 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:22,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315004566] [2022-01-31 21:27:22,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1315004566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:22,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:22,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 21:27:22,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976834874] [2022-01-31 21:27:22,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:22,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 21:27:22,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:22,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 21:27:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:27:22,996 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:23,018 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-01-31 21:27:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 21:27:23,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 21:27:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:23,028 INFO L225 Difference]: With dead ends: 34 [2022-01-31 21:27:23,028 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 21:27:23,030 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 21:27:23,032 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 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 21:27:23,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:27:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 21:27:23,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 21:27:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-31 21:27:23,052 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-01-31 21:27:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:23,052 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-31 21:27:23,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-31 21:27:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 21:27:23,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:23,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:23,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:27:23,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:23,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-01-31 21:27:23,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:23,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132196091] [2022-01-31 21:27:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:23,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:23,056 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:23,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:23,113 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 21:27:23,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132196091] [2022-01-31 21:27:23,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132196091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:23,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:23,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 21:27:23,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313498300] [2022-01-31 21:27:23,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:23,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 21:27:23,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:23,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 21:27:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 21:27:23,116 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:23,145 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-01-31 21:27:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 21:27:23,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 21:27:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:23,146 INFO L225 Difference]: With dead ends: 24 [2022-01-31 21:27:23,146 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 21:27:23,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 21:27:23,147 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:23,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:27:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 21:27:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 21:27:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-31 21:27:23,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-01-31 21:27:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:23,168 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-31 21:27:23,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-31 21:27:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 21:27:23,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:23,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:23,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:27:23,169 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:23,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-01-31 21:27:23,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:23,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846912042] [2022-01-31 21:27:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:23,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:23,235 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:27:23,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:23,334 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:23,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846912042] [2022-01-31 21:27:23,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1846912042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:23,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:23,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:27:23,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091495674] [2022-01-31 21:27:23,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:23,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:27:23,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:23,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:27:23,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 21:27:23,338 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:23,410 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-01-31 21:27:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 21:27:23,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 21:27:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:23,412 INFO L225 Difference]: With dead ends: 26 [2022-01-31 21:27:23,412 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 21:27:23,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:27:23,418 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:23,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:27:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 21:27:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 21:27:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-31 21:27:23,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-01-31 21:27:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:23,423 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-31 21:27:23,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-31 21:27:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 21:27:23,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:23,423 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:23,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:27:23,426 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2022-01-31 21:27:23,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:23,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656820767] [2022-01-31 21:27:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:23,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:23,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:23,602 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:23,650 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:23,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:23,734 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:23,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:23,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:23,838 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 21:27:23,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:23,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656820767] [2022-01-31 21:27:23,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656820767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:23,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:23,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:27:23,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001131772] [2022-01-31 21:27:23,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:23,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:27:23,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:27:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:27:23,943 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 21:27:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:24,061 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-01-31 21:27:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:27:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 21:27:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:24,062 INFO L225 Difference]: With dead ends: 39 [2022-01-31 21:27:24,063 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 21:27:24,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:27:24,064 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:24,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 39 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 21:27:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 21:27:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 21:27:24,069 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-01-31 21:27:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:24,069 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 21:27:24,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 21:27:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 21:27:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:27:24,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:24,070 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:24,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:27:24,070 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash -510493847, now seen corresponding path program 2 times [2022-01-31 21:27:24,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:24,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215967747] [2022-01-31 21:27:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:24,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:24,193 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:24,194 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:24,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:24,267 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:24,268 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:24,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:24,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:24,305 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 21:27:24,363 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:24,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215967747] [2022-01-31 21:27:24,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [215967747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:24,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:24,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:27:24,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443783741] [2022-01-31 21:27:24,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:24,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:27:24,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:24,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:27:24,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:27:24,365 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:24,475 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-01-31 21:27:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:27:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:27:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:24,476 INFO L225 Difference]: With dead ends: 47 [2022-01-31 21:27:24,476 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 21:27:24,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:27:24,477 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:24,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:27:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 21:27:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-01-31 21:27:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-31 21:27:24,481 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2022-01-31 21:27:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:24,482 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-31 21:27:24,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-31 21:27:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 21:27:24,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:24,482 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:24,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 21:27:24,483 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash 969620496, now seen corresponding path program 3 times [2022-01-31 21:27:24,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:24,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979775402] [2022-01-31 21:27:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:24,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:24,573 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:24,573 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:24,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:24,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:24,646 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:24,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:24,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:24,686 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 21:27:24,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979775402] [2022-01-31 21:27:24,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [979775402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:24,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:24,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:27:24,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118110148] [2022-01-31 21:27:24,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:24,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:27:24,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:27:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:27:24,772 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:27:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:24,935 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-01-31 21:27:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:27:24,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:27:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:24,936 INFO L225 Difference]: With dead ends: 53 [2022-01-31 21:27:24,936 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 21:27:24,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:27:24,937 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:24,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 21:27:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 21:27:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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 21:27:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-01-31 21:27:24,941 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 27 [2022-01-31 21:27:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:24,941 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-01-31 21:27:24,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:27:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-01-31 21:27:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:27:24,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:24,942 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:24,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 21:27:24,942 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash -777622499, now seen corresponding path program 4 times [2022-01-31 21:27:24,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:24,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438814462] [2022-01-31 21:27:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:24,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,018 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,018 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:25,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,099 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:25,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:25,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:25,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:25,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438814462] [2022-01-31 21:27:25,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438814462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:25,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:25,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:27:25,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414718631] [2022-01-31 21:27:25,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:25,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:27:25,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:27:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:27:25,346 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:25,589 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2022-01-31 21:27:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:27:25,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:27:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:25,590 INFO L225 Difference]: With dead ends: 75 [2022-01-31 21:27:25,590 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 21:27:25,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:27:25,591 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:25,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 19 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 21:27:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-31 21:27:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-01-31 21:27:25,597 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2022-01-31 21:27:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:25,597 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-01-31 21:27:25,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-01-31 21:27:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 21:27:25,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:25,598 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:25,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 21:27:25,598 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash -522473983, now seen corresponding path program 5 times [2022-01-31 21:27:25,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:25,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737427673] [2022-01-31 21:27:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:25,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,675 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:25,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,735 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:25,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:25,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:25,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:25,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737427673] [2022-01-31 21:27:25,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1737427673] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:25,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:25,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:27:25,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365114456] [2022-01-31 21:27:25,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:25,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:27:25,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:25,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:27:25,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:27:25,946 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 21:27:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:26,240 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2022-01-31 21:27:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:27:26,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 21:27:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:26,241 INFO L225 Difference]: With dead ends: 79 [2022-01-31 21:27:26,241 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 21:27:26,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=391, Invalid=1015, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:27:26,242 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:26,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:26,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 21:27:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-01-31 21:27:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-01-31 21:27:26,247 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 35 [2022-01-31 21:27:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:26,248 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-01-31 21:27:26,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 21:27:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-01-31 21:27:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:27:26,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:26,248 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:26,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 21:27:26,248 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash 925460615, now seen corresponding path program 6 times [2022-01-31 21:27:26,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:26,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023748322] [2022-01-31 21:27:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:26,307 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:26,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:26,333 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:26,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:26,408 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:26,409 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:26,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:26,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:26,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:26,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023748322] [2022-01-31 21:27:26,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023748322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:26,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:26,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:27:26,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872690806] [2022-01-31 21:27:26,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:26,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:27:26,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:26,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:27:26,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:27:26,614 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:26,903 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2022-01-31 21:27:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:27:26,904 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:27:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:26,904 INFO L225 Difference]: With dead ends: 89 [2022-01-31 21:27:26,904 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 21:27:26,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:27:26,905 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:26,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 34 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 21:27:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2022-01-31 21:27:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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 21:27:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-01-31 21:27:26,912 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2022-01-31 21:27:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:26,912 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-01-31 21:27:26,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-01-31 21:27:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 21:27:26,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:26,913 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:26,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 21:27:26,913 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash 897664690, now seen corresponding path program 7 times [2022-01-31 21:27:26,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:26,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468300369] [2022-01-31 21:27:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:26,954 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:26,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:26,980 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:26,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,036 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:27,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:27,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:27,116 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 21:27:27,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:27,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468300369] [2022-01-31 21:27:27,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [468300369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:27,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:27,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:27:27,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006848788] [2022-01-31 21:27:27,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:27,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:27:27,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:27,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:27:27,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:27:27,274 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:27,636 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2022-01-31 21:27:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:27:27,636 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 21:27:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:27,637 INFO L225 Difference]: With dead ends: 85 [2022-01-31 21:27:27,637 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 21:27:27,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=1419, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:27:27,638 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:27,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 21:27:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-31 21:27:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-01-31 21:27:27,642 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2022-01-31 21:27:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:27,642 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-01-31 21:27:27,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-01-31 21:27:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:27:27,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:27,643 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:27,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 21:27:27,643 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:27,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1296637509, now seen corresponding path program 8 times [2022-01-31 21:27:27,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:27,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116350507] [2022-01-31 21:27:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:27,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,724 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:27,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,803 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,804 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:27,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:27,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:27,874 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 21:27:28,063 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:28,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116350507] [2022-01-31 21:27:28,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [116350507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:28,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:28,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:27:28,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299653392] [2022-01-31 21:27:28,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:28,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:27:28,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:28,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:27:28,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:27:28,065 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:28,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:28,509 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2022-01-31 21:27:28,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:27:28,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:27:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:28,510 INFO L225 Difference]: With dead ends: 95 [2022-01-31 21:27:28,510 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 21:27:28,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=702, Invalid=1848, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:27:28,511 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:28,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 34 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 21:27:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-31 21:27:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-01-31 21:27:28,515 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 48 [2022-01-31 21:27:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:28,516 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-01-31 21:27:28,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-01-31 21:27:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:27:28,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:28,516 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:28,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 21:27:28,516 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1149355906, now seen corresponding path program 9 times [2022-01-31 21:27:28,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:28,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899087104] [2022-01-31 21:27:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:28,558 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:28,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:28,583 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:28,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:28,666 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:28,666 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:28,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:28,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:28,743 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 21:27:28,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:28,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899087104] [2022-01-31 21:27:28,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1899087104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:28,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:28,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:27:28,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554583632] [2022-01-31 21:27:28,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:28,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:27:28,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:28,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:27:28,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:27:28,932 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 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 21:27:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:29,413 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2022-01-31 21:27:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:27:29,414 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 21:27:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:29,414 INFO L225 Difference]: With dead ends: 105 [2022-01-31 21:27:29,414 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 21:27:29,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=858, Invalid=2334, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:27:29,415 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:29,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 29 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 21:27:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-01-31 21:27:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-01-31 21:27:29,420 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2022-01-31 21:27:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:29,420 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-01-31 21:27:29,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 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 21:27:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-01-31 21:27:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:27:29,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:29,421 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:29,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 21:27:29,421 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash -246172433, now seen corresponding path program 10 times [2022-01-31 21:27:29,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:29,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103405869] [2022-01-31 21:27:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:29,461 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:29,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:29,486 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:29,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:29,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:29,562 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:29,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:29,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:29,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:29,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103405869] [2022-01-31 21:27:29,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1103405869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:29,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:29,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:27:29,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976112875] [2022-01-31 21:27:29,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:29,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:27:29,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:29,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:27:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=711, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:27:29,961 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:30,568 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-01-31 21:27:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:27:30,568 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:27:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:30,569 INFO L225 Difference]: With dead ends: 115 [2022-01-31 21:27:30,569 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 21:27:30,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:27:30,570 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:30,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 29 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:30,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 21:27:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 21:27:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-01-31 21:27:30,574 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2022-01-31 21:27:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:30,575 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-01-31 21:27:30,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-01-31 21:27:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 21:27:30,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:30,575 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:30,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 21:27:30,575 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:30,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1013674058, now seen corresponding path program 11 times [2022-01-31 21:27:30,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:30,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506587200] [2022-01-31 21:27:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:30,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:30,645 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:30,646 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:30,670 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:30,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:30,729 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:30,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:30,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:30,834 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 21:27:31,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:31,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506587200] [2022-01-31 21:27:31,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506587200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:31,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:31,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:31,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250293156] [2022-01-31 21:27:31,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:31,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:27:31,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:27:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:27:31,162 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:32,029 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2022-01-31 21:27:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:27:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 21:27:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:32,030 INFO L225 Difference]: With dead ends: 125 [2022-01-31 21:27:32,030 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 21:27:32,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1215, Invalid=3477, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:27:32,032 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:32,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 54 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:27:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 21:27:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-01-31 21:27:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.0625) internal successors, (68), 64 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 21:27:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-01-31 21:27:32,036 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 63 [2022-01-31 21:27:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:32,036 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-01-31 21:27:32,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-01-31 21:27:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:27:32,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:32,037 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:32,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 21:27:32,037 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:32,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1957732899, now seen corresponding path program 12 times [2022-01-31 21:27:32,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:32,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016068121] [2022-01-31 21:27:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:32,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:32,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:32,115 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:32,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:32,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:32,194 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:32,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:32,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:32,325 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 21:27:32,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016068121] [2022-01-31 21:27:32,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1016068121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:32,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:32,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:27:32,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020173456] [2022-01-31 21:27:32,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:32,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:27:32,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:32,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:27:32,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=1008, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:27:32,765 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:33,736 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-01-31 21:27:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:27:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 21:27:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:33,738 INFO L225 Difference]: With dead ends: 135 [2022-01-31 21:27:33,738 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 21:27:33,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1416, Invalid=4134, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:27:33,750 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:33,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 69 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:27:33,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 21:27:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-01-31 21:27:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-01-31 21:27:33,755 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2022-01-31 21:27:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:33,755 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-01-31 21:27:33,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-01-31 21:27:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:27:33,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:33,756 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:33,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 21:27:33,756 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash 649604630, now seen corresponding path program 13 times [2022-01-31 21:27:33,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:33,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015956771] [2022-01-31 21:27:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:33,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:33,840 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:33,840 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:33,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:33,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:33,906 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:33,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:34,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:34,014 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 21:27:34,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:34,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015956771] [2022-01-31 21:27:34,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2015956771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:34,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:34,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 21:27:34,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827926274] [2022-01-31 21:27:34,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:34,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 21:27:34,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 21:27:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1176, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:27:34,336 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:35,413 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2022-01-31 21:27:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:27:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:27:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:35,414 INFO L225 Difference]: With dead ends: 145 [2022-01-31 21:27:35,414 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 21:27:35,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1632, Invalid=4848, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:27:35,416 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:35,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 34 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:27:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 21:27:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-01-31 21:27:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-01-31 21:27:35,420 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 73 [2022-01-31 21:27:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:35,421 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-01-31 21:27:35,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-01-31 21:27:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:27:35,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:35,421 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:35,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 21:27:35,421 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash -415340201, now seen corresponding path program 14 times [2022-01-31 21:27:35,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:35,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320227001] [2022-01-31 21:27:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:35,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:35,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:35,517 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:35,536 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:35,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:35,576 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:35,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:35,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:35,698 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 21:27:36,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:36,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320227001] [2022-01-31 21:27:36,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320227001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:36,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:36,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 21:27:36,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581170045] [2022-01-31 21:27:36,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:36,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 21:27:36,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:36,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 21:27:36,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:27:36,210 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 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 21:27:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:37,365 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2022-01-31 21:27:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:27:37,366 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:27:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:37,366 INFO L225 Difference]: With dead ends: 155 [2022-01-31 21:27:37,366 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 21:27:37,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1863, Invalid=5619, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:27:37,368 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:37,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 29 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:27:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 21:27:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-31 21:27:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-01-31 21:27:37,373 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 78 [2022-01-31 21:27:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:37,373 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-01-31 21:27:37,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 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 21:27:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-01-31 21:27:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:27:37,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:37,373 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:37,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 21:27:37,374 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:37,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash -300699166, now seen corresponding path program 15 times [2022-01-31 21:27:37,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:37,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750162653] [2022-01-31 21:27:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:37,414 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:37,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:37,439 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:37,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:37,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:37,499 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:37,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:37,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:37,639 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 21:27:38,143 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:38,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750162653] [2022-01-31 21:27:38,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1750162653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:38,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:38,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 21:27:38,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197069114] [2022-01-31 21:27:38,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:38,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 21:27:38,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 21:27:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:27:38,155 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:39,334 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2022-01-31 21:27:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:27:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:27:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:39,335 INFO L225 Difference]: With dead ends: 165 [2022-01-31 21:27:39,335 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 21:27:39,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2368 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2109, Invalid=6447, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:27:39,337 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:39,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 34 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:27:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 21:27:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-01-31 21:27:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 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 21:27:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-01-31 21:27:39,341 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 83 [2022-01-31 21:27:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:39,341 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-01-31 21:27:39,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-01-31 21:27:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 21:27:39,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:39,342 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:39,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 21:27:39,343 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1076742795, now seen corresponding path program 16 times [2022-01-31 21:27:39,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:39,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692102931] [2022-01-31 21:27:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:39,383 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:39,414 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:39,414 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:39,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:39,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:39,479 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:39,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:39,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:40,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:40,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692102931] [2022-01-31 21:27:40,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [692102931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:40,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:40,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 21:27:40,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656675919] [2022-01-31 21:27:40,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:40,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 21:27:40,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:40,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 21:27:40,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=1758, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:27:40,135 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 51 states, 51 states have (on average 1.6470588235294117) internal successors, (84), 50 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:41,467 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2022-01-31 21:27:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:27:41,467 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6470588235294117) internal successors, (84), 50 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-01-31 21:27:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:41,468 INFO L225 Difference]: With dead ends: 175 [2022-01-31 21:27:41,468 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 21:27:41,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2370, Invalid=7332, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:27:41,469 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 202 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:41,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 49 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:27:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 21:27:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-01-31 21:27:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 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 21:27:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-01-31 21:27:41,474 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 88 [2022-01-31 21:27:41,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:41,474 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-01-31 21:27:41,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6470588235294117) internal successors, (84), 50 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:41,474 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-01-31 21:27:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 21:27:41,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:41,474 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:41,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 21:27:41,475 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:41,475 INFO L85 PathProgramCache]: Analyzing trace with hash -412271698, now seen corresponding path program 17 times [2022-01-31 21:27:41,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:41,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954566619] [2022-01-31 21:27:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:41,529 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:41,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:41,545 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:41,556 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:41,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:41,596 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:41,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:41,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:41,779 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 21:27:42,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:42,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954566619] [2022-01-31 21:27:42,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954566619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:42,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:42,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 21:27:42,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314947451] [2022-01-31 21:27:42,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:42,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 21:27:42,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:42,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 21:27:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=1978, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:27:42,362 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 54 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 2 states have call successors, (3), 3 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 21:27:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:43,606 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2022-01-31 21:27:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:27:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 2 states have call successors, (3), 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 21:27:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:43,610 INFO L225 Difference]: With dead ends: 185 [2022-01-31 21:27:43,610 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 21:27:43,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2646, Invalid=8274, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:27:43,611 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:43,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 29 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:27:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 21:27:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-01-31 21:27:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 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 21:27:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-01-31 21:27:43,624 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 93 [2022-01-31 21:27:43,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:43,624 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-01-31 21:27:43,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 2 states have call successors, (3), 3 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 21:27:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-01-31 21:27:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 21:27:43,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:43,625 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:43,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 21:27:43,625 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:43,625 INFO L85 PathProgramCache]: Analyzing trace with hash -412121665, now seen corresponding path program 18 times [2022-01-31 21:27:43,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:43,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242438092] [2022-01-31 21:27:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:43,670 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:43,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:43,697 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:43,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:43,753 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:43,753 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:43,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:43,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:43,926 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 21:27:44,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:44,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242438092] [2022-01-31 21:27:44,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [242438092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:44,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:44,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:27:44,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121056553] [2022-01-31 21:27:44,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:44,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:27:44,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:44,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:27:44,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=981, Invalid=2211, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:27:44,595 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 56 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:46,523 INFO L93 Difference]: Finished difference Result 195 states and 206 transitions. [2022-01-31 21:27:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:27:46,523 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 56 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 21:27:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:46,524 INFO L225 Difference]: With dead ends: 195 [2022-01-31 21:27:46,524 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:27:46,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3409 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2937, Invalid=9273, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:27:46,525 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 300 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:46,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 34 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:27:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:27:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 21:27:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 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 21:27:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-01-31 21:27:46,529 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 98 [2022-01-31 21:27:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:46,530 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-01-31 21:27:46,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 56 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-01-31 21:27:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 21:27:46,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:46,530 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:46,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 21:27:46,531 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash 619973498, now seen corresponding path program 19 times [2022-01-31 21:27:46,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:46,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202772691] [2022-01-31 21:27:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:46,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:46,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:46,609 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:46,627 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:46,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:46,655 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:46,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:46,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:47,502 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:47,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202772691] [2022-01-31 21:27:47,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1202772691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:47,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:47,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 21:27:47,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653050929] [2022-01-31 21:27:47,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:47,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 21:27:47,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 21:27:47,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=2457, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:27:47,503 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 60 states, 60 states have (on average 1.65) internal successors, (99), 59 states have internal predecessors, (99), 2 states have call successors, (3), 3 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 21:27:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:49,295 INFO L93 Difference]: Finished difference Result 205 states and 216 transitions. [2022-01-31 21:27:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:27:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 59 states have internal predecessors, (99), 2 states have call successors, (3), 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 103 [2022-01-31 21:27:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:49,296 INFO L225 Difference]: With dead ends: 205 [2022-01-31 21:27:49,296 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 21:27:49,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3243, Invalid=10329, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:27:49,297 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 314 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2775 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:49,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 54 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2775 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:27:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 21:27:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-01-31 21:27:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 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 21:27:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-01-31 21:27:49,302 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 103 [2022-01-31 21:27:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:49,302 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-01-31 21:27:49,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 59 states have internal predecessors, (99), 2 states have call successors, (3), 3 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 21:27:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-01-31 21:27:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 21:27:49,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:49,302 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:49,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 21:27:49,303 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash -642491661, now seen corresponding path program 20 times [2022-01-31 21:27:49,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:49,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014050237] [2022-01-31 21:27:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:49,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:49,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:49,367 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:49,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:49,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:49,440 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:49,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:49,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:49,636 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 21:27:50,427 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:50,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014050237] [2022-01-31 21:27:50,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014050237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:50,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:50,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:27:50,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500984970] [2022-01-31 21:27:50,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:50,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:27:50,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:27:50,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=2716, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:27:50,429 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 62 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:52,224 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2022-01-31 21:27:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:27:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 62 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-01-31 21:27:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:52,225 INFO L225 Difference]: With dead ends: 215 [2022-01-31 21:27:52,225 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 21:27:52,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4208 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3564, Invalid=11442, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:27:52,228 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:52,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 44 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3041 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:27:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 21:27:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-01-31 21:27:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.036697247706422) internal successors, (113), 109 states have internal predecessors, (113), 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 21:27:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-01-31 21:27:52,232 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 108 [2022-01-31 21:27:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:52,233 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-01-31 21:27:52,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 62 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-01-31 21:27:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 21:27:52,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:52,233 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:52,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 21:27:52,234 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:52,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:52,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1377263942, now seen corresponding path program 21 times [2022-01-31 21:27:52,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:52,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375875607] [2022-01-31 21:27:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:52,283 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:52,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:52,299 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:52,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:52,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:52,336 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:52,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:52,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:52,592 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 21:27:53,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:53,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375875607] [2022-01-31 21:27:53,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375875607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:53,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:53,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 21:27:53,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172722614] [2022-01-31 21:27:53,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:53,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 21:27:53,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 21:27:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1400, Invalid=3292, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:27:53,210 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 65 states have internal predecessors, (109), 2 states have call successors, (3), 3 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 21:27:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:55,218 INFO L93 Difference]: Finished difference Result 301 states and 312 transitions. [2022-01-31 21:27:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:27:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 65 states have internal predecessors, (109), 2 states have call successors, (3), 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 113 [2022-01-31 21:27:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:55,219 INFO L225 Difference]: With dead ends: 301 [2022-01-31 21:27:55,219 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 21:27:55,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5033 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4003, Invalid=13289, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 21:27:55,221 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 221 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:55,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 39 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:27:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 21:27:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-01-31 21:27:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0263157894736843) internal successors, (195), 190 states have internal predecessors, (195), 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 21:27:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2022-01-31 21:27:55,230 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 113 [2022-01-31 21:27:55,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:55,230 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2022-01-31 21:27:55,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 65 states have internal predecessors, (109), 2 states have call successors, (3), 3 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 21:27:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2022-01-31 21:27:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 21:27:55,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:55,231 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:55,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 21:27:55,231 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:55,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2017151266, now seen corresponding path program 22 times [2022-01-31 21:27:55,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:55,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624515317] [2022-01-31 21:27:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:55,304 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:55,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:55,323 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:55,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:55,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:55,389 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:55,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:55,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:56,292 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:56,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624515317] [2022-01-31 21:27:56,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [624515317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:56,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:56,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:27:56,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324367105] [2022-01-31 21:27:56,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:56,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:27:56,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:56,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:27:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=3163, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:27:56,294 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:58,251 INFO L93 Difference]: Finished difference Result 309 states and 323 transitions. [2022-01-31 21:27:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:27:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 21:27:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:58,252 INFO L225 Difference]: With dead ends: 309 [2022-01-31 21:27:58,252 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 21:27:58,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4959 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4173, Invalid=13383, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 21:27:58,254 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 270 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3558 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 3558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:58,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 54 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 3558 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:27:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 21:27:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 122. [2022-01-31 21:27:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 117 states have internal predecessors, (121), 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 21:27:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-01-31 21:27:58,259 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 116 [2022-01-31 21:27:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:58,259 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-01-31 21:27:58,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-01-31 21:27:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 21:27:58,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:58,259 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:58,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 21:27:58,260 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1925225737, now seen corresponding path program 23 times [2022-01-31 21:27:58,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:58,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266683212] [2022-01-31 21:27:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:58,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:58,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:58,329 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:58,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:58,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:58,401 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:58,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:58,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:59,617 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266683212] [2022-01-31 21:27:59,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1266683212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:59,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:59,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:27:59,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124764407] [2022-01-31 21:27:59,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:59,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:27:59,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:59,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:27:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=3456, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:27:59,619 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 2 states have call successors, (3), 3 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 21:28:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:01,876 INFO L93 Difference]: Finished difference Result 241 states and 252 transitions. [2022-01-31 21:28:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 21:28:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 2 states have call successors, (3), 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 121 [2022-01-31 21:28:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:01,877 INFO L225 Difference]: With dead ends: 241 [2022-01-31 21:28:01,877 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 21:28:01,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5426 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4536, Invalid=14646, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:28:01,879 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 283 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3863 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 3863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:01,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 39 Invalid, 4219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 3863 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:28:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 21:28:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-31 21:28:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 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 21:28:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-01-31 21:28:01,892 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 121 [2022-01-31 21:28:01,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:01,892 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-01-31 21:28:01,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 2 states have call successors, (3), 3 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 21:28:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-01-31 21:28:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 21:28:01,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:01,893 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:01,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 21:28:01,893 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1939756182, now seen corresponding path program 24 times [2022-01-31 21:28:01,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:01,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401668842] [2022-01-31 21:28:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:01,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:01,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:01,953 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:01,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:02,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:02,021 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:02,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:02,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:02,348 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 21:28:03,442 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:03,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401668842] [2022-01-31 21:28:03,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [401668842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:03,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:03,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:28:03,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205821792] [2022-01-31 21:28:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:03,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:28:03,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:28:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1749, Invalid=4103, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:28:03,443 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:05,658 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2022-01-31 21:28:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:28:05,658 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 21:28:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:05,659 INFO L225 Difference]: With dead ends: 337 [2022-01-31 21:28:05,659 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 21:28:05,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6357 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5028, Invalid=16728, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 21:28:05,661 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 4366 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 4539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 4366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:05,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 54 Invalid, 4539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 4366 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:28:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 21:28:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-01-31 21:28:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0234741784037558) internal successors, (218), 213 states have internal predecessors, (218), 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 21:28:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 222 transitions. [2022-01-31 21:28:05,671 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 222 transitions. Word has length 126 [2022-01-31 21:28:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:05,671 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 222 transitions. [2022-01-31 21:28:05,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 222 transitions. [2022-01-31 21:28:05,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 21:28:05,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:05,672 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:05,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 21:28:05,672 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:05,672 INFO L85 PathProgramCache]: Analyzing trace with hash -375497880, now seen corresponding path program 25 times [2022-01-31 21:28:05,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:05,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025997117] [2022-01-31 21:28:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:05,737 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:05,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:05,763 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:05,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:05,822 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:05,822 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:05,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:06,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:06,156 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 21:28:07,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025997117] [2022-01-31 21:28:07,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025997117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:07,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:07,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 21:28:07,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468158046] [2022-01-31 21:28:07,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:07,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 21:28:07,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 21:28:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1742, Invalid=3958, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:28:07,099 INFO L87 Difference]: Start difference. First operand 218 states and 222 transitions. Second operand has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 states have internal predecessors, (125), 2 states have call successors, (3), 3 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 21:28:09,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:09,875 INFO L93 Difference]: Finished difference Result 345 states and 359 transitions. [2022-01-31 21:28:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 21:28:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 states have internal predecessors, (125), 2 states have call successors, (3), 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 129 [2022-01-31 21:28:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:09,876 INFO L225 Difference]: With dead ends: 345 [2022-01-31 21:28:09,876 INFO L226 Difference]: Without dead ends: 225 [2022-01-31 21:28:09,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6274 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5220, Invalid=16832, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 21:28:09,878 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 203 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4392 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 4674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 4392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:09,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 29 Invalid, 4674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 4392 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:28:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-31 21:28:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 135. [2022-01-31 21:28:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 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 21:28:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-01-31 21:28:09,883 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 129 [2022-01-31 21:28:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:09,883 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-01-31 21:28:09,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 states have internal predecessors, (125), 2 states have call successors, (3), 3 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 21:28:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-01-31 21:28:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 21:28:09,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:09,884 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:09,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 21:28:09,884 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1727954875, now seen corresponding path program 26 times [2022-01-31 21:28:09,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:09,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862174769] [2022-01-31 21:28:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:09,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:09,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:09,944 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:09,960 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:09,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:09,986 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:09,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:10,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:11,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:11,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862174769] [2022-01-31 21:28:11,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862174769] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:11,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:11,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 21:28:11,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767266630] [2022-01-31 21:28:11,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:11,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 21:28:11,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:11,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 21:28:11,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1877, Invalid=4285, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:28:11,026 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:13,622 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2022-01-31 21:28:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 21:28:13,622 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-01-31 21:28:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:13,623 INFO L225 Difference]: With dead ends: 267 [2022-01-31 21:28:13,623 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:28:13,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6798 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5625, Invalid=18245, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 21:28:13,624 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 261 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4761 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:13,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 39 Invalid, 4901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4761 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:28:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:28:13,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-01-31 21:28:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 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 21:28:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-01-31 21:28:13,630 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 134 [2022-01-31 21:28:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:13,630 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-01-31 21:28:13,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-01-31 21:28:13,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 21:28:13,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:13,630 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:13,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 21:28:13,631 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:13,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:13,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1660936524, now seen corresponding path program 27 times [2022-01-31 21:28:13,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:13,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912175840] [2022-01-31 21:28:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:13,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:13,710 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:13,710 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:13,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:13,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:13,779 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:13,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:14,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:14,118 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 21:28:15,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:15,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912175840] [2022-01-31 21:28:15,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [912175840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:15,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:15,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 21:28:15,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996352702] [2022-01-31 21:28:15,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:15,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 21:28:15,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 21:28:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2017, Invalid=4625, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 21:28:15,132 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 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 21:28:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:17,812 INFO L93 Difference]: Finished difference Result 277 states and 288 transitions. [2022-01-31 21:28:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 21:28:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 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 139 [2022-01-31 21:28:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:17,816 INFO L225 Difference]: With dead ends: 277 [2022-01-31 21:28:17,816 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 21:28:17,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7370 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6045, Invalid=19715, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 21:28:17,818 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5189 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 5189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:17,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 34 Invalid, 5439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 5189 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:28:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 21:28:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-01-31 21:28:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 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 21:28:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-01-31 21:28:17,824 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 139 [2022-01-31 21:28:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:17,824 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-01-31 21:28:17,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 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 21:28:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-01-31 21:28:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 21:28:17,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:17,824 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:17,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 21:28:17,824 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash -629534215, now seen corresponding path program 28 times [2022-01-31 21:28:17,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:17,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177124536] [2022-01-31 21:28:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:17,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:17,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:17,879 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:17,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:17,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:17,925 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:17,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:18,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:18,283 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 21:28:19,635 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:19,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177124536] [2022-01-31 21:28:19,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177124536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:19,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:19,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 21:28:19,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692916938] [2022-01-31 21:28:19,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:19,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 21:28:19,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:19,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 21:28:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2162, Invalid=4978, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:28:19,637 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:22,921 INFO L93 Difference]: Finished difference Result 287 states and 298 transitions. [2022-01-31 21:28:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 21:28:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-01-31 21:28:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:22,922 INFO L225 Difference]: With dead ends: 287 [2022-01-31 21:28:22,922 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 21:28:22,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7909 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6480, Invalid=21242, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 21:28:22,926 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5631 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 5631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:22,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 44 Invalid, 5888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 5631 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:28:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 21:28:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-01-31 21:28:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 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 21:28:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-01-31 21:28:22,932 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 144 [2022-01-31 21:28:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:22,932 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-01-31 21:28:22,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-01-31 21:28:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 21:28:22,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:22,933 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:22,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 21:28:22,933 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:22,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:22,934 INFO L85 PathProgramCache]: Analyzing trace with hash 467601408, now seen corresponding path program 29 times [2022-01-31 21:28:22,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:22,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945095267] [2022-01-31 21:28:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:22,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:23,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:23,008 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:23,026 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:23,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:23,063 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:23,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:23,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:23,423 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 21:28:24,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:24,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945095267] [2022-01-31 21:28:24,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945095267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:24,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:24,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 21:28:24,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916904444] [2022-01-31 21:28:24,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:24,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 21:28:24,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 21:28:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2312, Invalid=5344, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 21:28:24,881 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 states have internal predecessors, (145), 2 states have call successors, (3), 3 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 21:28:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:28,626 INFO L93 Difference]: Finished difference Result 297 states and 308 transitions. [2022-01-31 21:28:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 21:28:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 states have internal predecessors, (145), 2 states have call successors, (3), 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 149 [2022-01-31 21:28:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:28,627 INFO L225 Difference]: With dead ends: 297 [2022-01-31 21:28:28,627 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 21:28:28,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8496 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6930, Invalid=22826, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 21:28:28,630 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 349 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 6073 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 6457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 6073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:28,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 54 Invalid, 6457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 6073 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:28:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 21:28:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-01-31 21:28:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 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 21:28:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-01-31 21:28:28,659 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 149 [2022-01-31 21:28:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:28,659 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-01-31 21:28:28,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 states have internal predecessors, (145), 2 states have call successors, (3), 3 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 21:28:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-01-31 21:28:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 21:28:28,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:28,660 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:28,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 21:28:28,660 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1924538963, now seen corresponding path program 30 times [2022-01-31 21:28:28,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:28,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998662978] [2022-01-31 21:28:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:28,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:28,736 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:28,736 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:28,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:28,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:28,778 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:28,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:29,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:29,098 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 21:28:30,409 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998662978] [2022-01-31 21:28:30,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [998662978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:30,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:30,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 21:28:30,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096947234] [2022-01-31 21:28:30,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:30,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 21:28:30,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:30,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 21:28:30,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2467, Invalid=5723, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 21:28:30,412 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 91 states, 91 states have (on average 1.6483516483516483) internal successors, (150), 90 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:34,148 INFO L93 Difference]: Finished difference Result 307 states and 318 transitions. [2022-01-31 21:28:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 21:28:34,148 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.6483516483516483) internal successors, (150), 90 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-01-31 21:28:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:34,149 INFO L225 Difference]: With dead ends: 307 [2022-01-31 21:28:34,149 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 21:28:34,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7395, Invalid=24467, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 21:28:34,150 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 243 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6509 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 6843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 6509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:34,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 34 Invalid, 6843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 6509 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:28:34,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 21:28:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-01-31 21:28:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 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 21:28:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-01-31 21:28:34,156 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 154 [2022-01-31 21:28:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:34,156 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-01-31 21:28:34,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.6483516483516483) internal successors, (150), 90 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-01-31 21:28:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 21:28:34,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:34,157 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:34,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 21:28:34,157 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1944213324, now seen corresponding path program 31 times [2022-01-31 21:28:34,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:34,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204900486] [2022-01-31 21:28:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:34,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:34,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:34,225 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:34,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:34,282 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:34,282 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:34,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:34,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:34,685 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 21:28:35,978 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:35,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204900486] [2022-01-31 21:28:35,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [204900486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:35,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:35,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 21:28:35,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560398148] [2022-01-31 21:28:35,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:35,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 21:28:35,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 21:28:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2627, Invalid=6115, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 21:28:35,980 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 94 states, 94 states have (on average 1.648936170212766) internal successors, (155), 93 states have internal predecessors, (155), 2 states have call successors, (3), 3 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 21:28:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:39,317 INFO L93 Difference]: Finished difference Result 317 states and 328 transitions. [2022-01-31 21:28:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 21:28:39,317 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.648936170212766) internal successors, (155), 93 states have internal predecessors, (155), 2 states have call successors, (3), 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 159 [2022-01-31 21:28:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:39,318 INFO L225 Difference]: With dead ends: 317 [2022-01-31 21:28:39,318 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 21:28:39,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9733 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7875, Invalid=26165, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 21:28:39,320 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 372 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7018 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 7426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 7018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:39,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 39 Invalid, 7426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 7018 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:28:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 21:28:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-01-31 21:28:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 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 21:28:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-01-31 21:28:39,326 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 159 [2022-01-31 21:28:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:39,326 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-01-31 21:28:39,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.648936170212766) internal successors, (155), 93 states have internal predecessors, (155), 2 states have call successors, (3), 3 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 21:28:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-01-31 21:28:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 21:28:39,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:39,327 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:39,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 21:28:39,327 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:39,327 INFO L85 PathProgramCache]: Analyzing trace with hash -643194015, now seen corresponding path program 32 times [2022-01-31 21:28:39,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:39,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718251248] [2022-01-31 21:28:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:39,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:39,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:39,401 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:39,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:39,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:39,491 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:39,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:39,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:41,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718251248] [2022-01-31 21:28:41,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1718251248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:41,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:41,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 21:28:41,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938897797] [2022-01-31 21:28:41,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:41,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 21:28:41,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:41,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 21:28:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2792, Invalid=6520, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:28:41,554 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 97 states, 97 states have (on average 1.6494845360824741) internal successors, (160), 96 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:45,141 INFO L93 Difference]: Finished difference Result 327 states and 338 transitions. [2022-01-31 21:28:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 21:28:45,155 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.6494845360824741) internal successors, (160), 96 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-01-31 21:28:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:45,155 INFO L225 Difference]: With dead ends: 327 [2022-01-31 21:28:45,155 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 21:28:45,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10383 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8370, Invalid=27920, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 21:28:45,157 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 322 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7427 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 7427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:45,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 24 Invalid, 7845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 7427 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:28:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 21:28:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-01-31 21:28:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 165 states have internal predecessors, (169), 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 21:28:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-01-31 21:28:45,172 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 164 [2022-01-31 21:28:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:45,172 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-01-31 21:28:45,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.6494845360824741) internal successors, (160), 96 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-01-31 21:28:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 21:28:45,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:45,173 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:45,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 21:28:45,173 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:45,173 INFO L85 PathProgramCache]: Analyzing trace with hash -571388776, now seen corresponding path program 33 times [2022-01-31 21:28:45,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:45,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54102498] [2022-01-31 21:28:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:45,231 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:45,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:45,249 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:45,267 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:45,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:45,305 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:45,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:45,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:45,765 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 21:28:47,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:47,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54102498] [2022-01-31 21:28:47,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [54102498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:47,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:47,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 21:28:47,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748017363] [2022-01-31 21:28:47,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:47,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 21:28:47,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:47,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 21:28:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2962, Invalid=6938, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 21:28:47,557 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 100 states, 100 states have (on average 1.65) internal successors, (165), 99 states have internal predecessors, (165), 2 states have call successors, (3), 3 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 21:28:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:51,828 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2022-01-31 21:28:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 21:28:51,829 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.65) internal successors, (165), 99 states have internal predecessors, (165), 2 states have call successors, (3), 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 169 [2022-01-31 21:28:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:51,829 INFO L225 Difference]: With dead ends: 337 [2022-01-31 21:28:51,829 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 21:28:51,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11054 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8880, Invalid=29732, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 21:28:51,831 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 331 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7931 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 8301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 7931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:51,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 24 Invalid, 8301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 7931 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:28:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 21:28:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-01-31 21:28:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 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 21:28:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-01-31 21:28:51,839 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 169 [2022-01-31 21:28:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:51,839 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-01-31 21:28:51,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.65) internal successors, (165), 99 states have internal predecessors, (165), 2 states have call successors, (3), 3 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 21:28:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-01-31 21:28:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 21:28:51,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:51,840 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:51,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 21:28:51,840 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1318200085, now seen corresponding path program 34 times [2022-01-31 21:28:51,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:51,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334273868] [2022-01-31 21:28:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:51,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:51,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:51,901 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:51,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:51,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:51,948 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:51,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:52,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:52,432 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 21:28:53,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:53,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334273868] [2022-01-31 21:28:53,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [334273868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:53,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:53,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 21:28:53,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74106951] [2022-01-31 21:28:53,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:53,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 21:28:53,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:53,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 21:28:53,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=7369, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:28:53,696 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 103 states, 103 states have (on average 1.6504854368932038) internal successors, (170), 102 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:57,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:57,653 INFO L93 Difference]: Finished difference Result 347 states and 358 transitions. [2022-01-31 21:28:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 21:28:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.6504854368932038) internal successors, (170), 102 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 21:28:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:57,655 INFO L225 Difference]: With dead ends: 347 [2022-01-31 21:28:57,659 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 21:28:57,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11746 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9405, Invalid=31601, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 21:28:57,661 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 339 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 8427 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 8873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 8427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:57,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 49 Invalid, 8873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 8427 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:28:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 21:28:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-01-31 21:28:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 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 21:28:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2022-01-31 21:28:57,668 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 174 [2022-01-31 21:28:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:57,669 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2022-01-31 21:28:57,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.6504854368932038) internal successors, (170), 102 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2022-01-31 21:28:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 21:28:57,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:57,675 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:57,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 21:28:57,675 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash 439560164, now seen corresponding path program 35 times [2022-01-31 21:28:57,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:57,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694431128] [2022-01-31 21:28:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:57,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:57,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:57,776 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:57,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:57,829 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:57,829 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:57,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:58,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:58,240 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 21:28:59,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:59,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694431128] [2022-01-31 21:28:59,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [694431128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:59,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:59,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 21:28:59,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328308139] [2022-01-31 21:28:59,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:59,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 21:28:59,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 21:28:59,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3469, Invalid=8303, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 21:28:59,557 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand has 106 states, 106 states have (on average 1.650943396226415) internal successors, (175), 105 states have internal predecessors, (175), 2 states have call successors, (3), 3 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 21:29:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:04,059 INFO L93 Difference]: Finished difference Result 485 states and 496 transitions. [2022-01-31 21:29:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 21:29:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.650943396226415) internal successors, (175), 105 states have internal predecessors, (175), 2 states have call successors, (3), 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 179 [2022-01-31 21:29:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:04,060 INFO L225 Difference]: With dead ends: 485 [2022-01-31 21:29:04,060 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 21:29:04,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13103 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10102, Invalid=34630, Unknown=0, NotChecked=0, Total=44732 [2022-01-31 21:29:04,063 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 690 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9284 mSolverCounterSat, 730 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 9284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:04,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 29 Invalid, 10014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 9284 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:29:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 21:29:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-01-31 21:29:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0162337662337662) internal successors, (313), 308 states have internal predecessors, (313), 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 21:29:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 317 transitions. [2022-01-31 21:29:04,091 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 317 transitions. Word has length 179 [2022-01-31 21:29:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:04,091 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 317 transitions. [2022-01-31 21:29:04,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.650943396226415) internal successors, (175), 105 states have internal predecessors, (175), 2 states have call successors, (3), 3 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 21:29:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 317 transitions. [2022-01-31 21:29:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 21:29:04,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:04,092 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:04,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 21:29:04,092 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:04,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:04,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1488400644, now seen corresponding path program 36 times [2022-01-31 21:29:04,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:04,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012314427] [2022-01-31 21:29:04,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:04,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:04,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:04,136 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:04,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:04,177 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:04,177 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:04,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:04,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:04,519 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 21:29:06,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:06,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012314427] [2022-01-31 21:29:06,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1012314427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:06,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:06,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 21:29:06,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301850768] [2022-01-31 21:29:06,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:06,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 21:29:06,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:06,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 21:29:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3462, Invalid=8094, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 21:29:06,058 INFO L87 Difference]: Start difference. First operand 313 states and 317 transitions. Second operand has 108 states, 108 states have (on average 1.6481481481481481) internal successors, (178), 107 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:10,644 INFO L93 Difference]: Finished difference Result 493 states and 507 transitions. [2022-01-31 21:29:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 21:29:10,644 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.6481481481481481) internal successors, (178), 107 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 21:29:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:10,648 INFO L225 Difference]: With dead ends: 493 [2022-01-31 21:29:10,648 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:29:10,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12979 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10380, Invalid=34776, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 21:29:10,650 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 425 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9244 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 9710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 9244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:10,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 34 Invalid, 9710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 9244 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:29:10,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:29:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 188. [2022-01-31 21:29:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 183 states have internal predecessors, (187), 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 21:29:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 191 transitions. [2022-01-31 21:29:10,658 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 191 transitions. Word has length 182 [2022-01-31 21:29:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:10,659 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 191 transitions. [2022-01-31 21:29:10,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.6481481481481481) internal successors, (178), 107 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 191 transitions. [2022-01-31 21:29:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 21:29:10,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:10,659 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:10,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 21:29:10,660 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash 596541909, now seen corresponding path program 37 times [2022-01-31 21:29:10,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:10,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424250195] [2022-01-31 21:29:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:10,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:10,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:10,732 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:10,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:10,784 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:10,785 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:10,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:11,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:11,128 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 21:29:12,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:12,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424250195] [2022-01-31 21:29:12,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1424250195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:12,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:12,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 21:29:12,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375662168] [2022-01-31 21:29:12,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:12,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 21:29:12,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:12,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 21:29:12,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3651, Invalid=8559, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:29:12,736 INFO L87 Difference]: Start difference. First operand 188 states and 191 transitions. Second operand has 111 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 110 states have internal predecessors, (183), 2 states have call successors, (3), 3 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 21:29:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:18,623 INFO L93 Difference]: Finished difference Result 373 states and 384 transitions. [2022-01-31 21:29:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 21:29:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 110 states have internal predecessors, (183), 2 states have call successors, (3), 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 187 [2022-01-31 21:29:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:18,631 INFO L225 Difference]: With dead ends: 373 [2022-01-31 21:29:18,631 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 21:29:18,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13728 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=10947, Invalid=36795, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 21:29:18,633 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 508 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9833 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 10311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 9833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:18,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 44 Invalid, 10311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 9833 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 21:29:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 21:29:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-01-31 21:29:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 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 21:29:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2022-01-31 21:29:18,640 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 187 [2022-01-31 21:29:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:18,640 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2022-01-31 21:29:18,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 110 states have internal predecessors, (183), 2 states have call successors, (3), 3 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 21:29:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2022-01-31 21:29:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 21:29:18,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:18,641 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:18,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 21:29:18,641 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:18,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1954048264, now seen corresponding path program 38 times [2022-01-31 21:29:18,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:18,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809833650] [2022-01-31 21:29:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:18,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:18,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:18,714 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:18,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:18,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:18,777 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:18,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:19,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:21,006 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:21,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809833650] [2022-01-31 21:29:21,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1809833650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:21,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:21,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 21:29:21,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109482214] [2022-01-31 21:29:21,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:21,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 21:29:21,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 21:29:21,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=9037, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 21:29:21,010 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 114 states, 114 states have (on average 1.6491228070175439) internal successors, (188), 113 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:26,005 INFO L93 Difference]: Finished difference Result 383 states and 394 transitions. [2022-01-31 21:29:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 21:29:26,006 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.6491228070175439) internal successors, (188), 113 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-01-31 21:29:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:26,006 INFO L225 Difference]: With dead ends: 383 [2022-01-31 21:29:26,006 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 21:29:26,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14498 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=11529, Invalid=38871, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 21:29:26,009 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10357 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 10357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:26,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 39 Invalid, 10703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 10357 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 21:29:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 21:29:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-01-31 21:29:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 193 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 21:29:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 201 transitions. [2022-01-31 21:29:26,016 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 201 transitions. Word has length 192 [2022-01-31 21:29:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:26,016 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 201 transitions. [2022-01-31 21:29:26,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.6491228070175439) internal successors, (188), 113 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 201 transitions. [2022-01-31 21:29:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 21:29:26,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:26,017 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:26,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 21:29:26,017 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:26,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1346035999, now seen corresponding path program 39 times [2022-01-31 21:29:26,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:26,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183650579] [2022-01-31 21:29:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:26,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:26,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:26,068 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:26,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:26,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:26,121 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:26,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:26,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:26,563 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 21:29:28,647 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:28,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183650579] [2022-01-31 21:29:28,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [183650579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:28,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:28,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 21:29:28,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925449162] [2022-01-31 21:29:28,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:28,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 21:29:28,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 21:29:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4211, Invalid=10069, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 21:29:28,650 INFO L87 Difference]: Start difference. First operand 198 states and 201 transitions. Second operand has 117 states, 117 states have (on average 1.6495726495726495) internal successors, (193), 116 states have internal predecessors, (193), 2 states have call successors, (3), 3 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 21:29:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:34,347 INFO L93 Difference]: Finished difference Result 535 states and 546 transitions. [2022-01-31 21:29:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 21:29:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.6495726495726495) internal successors, (193), 116 states have internal predecessors, (193), 2 states have call successors, (3), 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 197 [2022-01-31 21:29:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:34,348 INFO L225 Difference]: With dead ends: 535 [2022-01-31 21:29:34,348 INFO L226 Difference]: Without dead ends: 345 [2022-01-31 21:29:34,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16001 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12298, Invalid=42224, Unknown=0, NotChecked=0, Total=54522 [2022-01-31 21:29:34,350 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 609 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 11186 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 11837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 11186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:34,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 64 Invalid, 11837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 11186 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 21:29:34,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-31 21:29:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-01-31 21:29:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.0147058823529411) internal successors, (345), 340 states have internal predecessors, (345), 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 21:29:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 349 transitions. [2022-01-31 21:29:34,370 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 349 transitions. Word has length 197 [2022-01-31 21:29:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:34,370 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 349 transitions. [2022-01-31 21:29:34,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.6495726495726495) internal successors, (193), 116 states have internal predecessors, (193), 2 states have call successors, (3), 3 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 21:29:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 349 transitions. [2022-01-31 21:29:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 21:29:34,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:34,371 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:34,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 21:29:34,371 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:34,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash -243023257, now seen corresponding path program 40 times [2022-01-31 21:29:34,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:34,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650623304] [2022-01-31 21:29:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:34,430 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:34,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:34,449 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:34,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:34,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:34,505 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:34,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:35,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:35,207 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 21:29:37,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:37,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650623304] [2022-01-31 21:29:37,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [650623304] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:37,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:37,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 21:29:37,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637292982] [2022-01-31 21:29:37,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:37,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 21:29:37,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:37,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 21:29:37,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4374, Invalid=10388, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 21:29:37,330 INFO L87 Difference]: Start difference. First operand 345 states and 349 transitions. Second operand has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:44,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:44,280 INFO L93 Difference]: Finished difference Result 539 states and 549 transitions. [2022-01-31 21:29:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 21:29:44,280 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-01-31 21:29:44,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:44,294 INFO L225 Difference]: With dead ends: 539 [2022-01-31 21:29:44,294 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 21:29:44,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16587 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=12781, Invalid=43625, Unknown=0, NotChecked=0, Total=56406 [2022-01-31 21:29:44,302 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 623 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 11578 mSolverCounterSat, 661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 12239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 661 IncrementalHoareTripleChecker+Valid, 11578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:44,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 44 Invalid, 12239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [661 Valid, 11578 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 21:29:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 21:29:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2022-01-31 21:29:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.0145772594752187) internal successors, (348), 343 states have internal predecessors, (348), 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 21:29:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 352 transitions. [2022-01-31 21:29:44,328 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 352 transitions. Word has length 200 [2022-01-31 21:29:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:44,328 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 352 transitions. [2022-01-31 21:29:44,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 352 transitions. [2022-01-31 21:29:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 21:29:44,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:44,329 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:44,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 21:29:44,329 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash 484571639, now seen corresponding path program 41 times [2022-01-31 21:29:44,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152694955] [2022-01-31 21:29:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:44,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:44,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:44,394 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:44,405 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:44,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:44,438 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:44,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:44,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:44,995 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 21:29:46,932 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:46,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152694955] [2022-01-31 21:29:46,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1152694955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:46,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:46,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 21:29:46,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671140083] [2022-01-31 21:29:46,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 21:29:46,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:46,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 21:29:46,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4540, Invalid=10712, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 21:29:46,935 INFO L87 Difference]: Start difference. First operand 348 states and 352 transitions. Second operand has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 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 21:29:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:53,982 INFO L93 Difference]: Finished difference Result 543 states and 553 transitions. [2022-01-31 21:29:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 21:29:53,982 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 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 203 [2022-01-31 21:29:53,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:53,983 INFO L225 Difference]: With dead ends: 543 [2022-01-31 21:29:53,983 INFO L226 Difference]: Without dead ends: 351 [2022-01-31 21:29:53,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17183 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=13273, Invalid=45049, Unknown=0, NotChecked=0, Total=58322 [2022-01-31 21:29:53,988 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 319 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 11702 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 12060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 11702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:53,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 39 Invalid, 12060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 11702 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 21:29:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-31 21:29:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-01-31 21:29:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.0144508670520231) internal successors, (351), 346 states have internal predecessors, (351), 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 21:29:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 355 transitions. [2022-01-31 21:29:54,036 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 355 transitions. Word has length 203 [2022-01-31 21:29:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:54,036 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 355 transitions. [2022-01-31 21:29:54,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 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 21:29:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 355 transitions. [2022-01-31 21:29:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 21:29:54,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:54,037 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:54,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 21:29:54,037 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:54,037 INFO L85 PathProgramCache]: Analyzing trace with hash -212262319, now seen corresponding path program 42 times [2022-01-31 21:29:54,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:54,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245098342] [2022-01-31 21:29:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:54,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:54,104 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:54,104 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:54,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:54,171 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:54,171 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:54,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:54,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:54,749 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 21:29:56,886 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:56,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245098342] [2022-01-31 21:29:56,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1245098342] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:56,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:56,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 21:29:56,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356842898] [2022-01-31 21:29:56,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:56,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 21:29:56,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 21:29:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4533, Invalid=10473, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:29:56,888 INFO L87 Difference]: Start difference. First operand 351 states and 355 transitions. Second operand has 123 states, 123 states have (on average 1.6422764227642277) internal successors, (202), 122 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:04,533 INFO L93 Difference]: Finished difference Result 555 states and 573 transitions. [2022-01-31 21:30:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 21:30:04,534 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.6422764227642277) internal successors, (202), 122 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-01-31 21:30:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:04,535 INFO L225 Difference]: With dead ends: 555 [2022-01-31 21:30:04,535 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 21:30:04,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17044 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=13593, Invalid=45213, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 21:30:04,537 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 321 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11836 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 11836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:04,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 34 Invalid, 12287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 11836 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 21:30:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 21:30:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 212. [2022-01-31 21:30:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 207 states have internal predecessors, (211), 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 21:30:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2022-01-31 21:30:04,545 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 206 [2022-01-31 21:30:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:04,545 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2022-01-31 21:30:04,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.6422764227642277) internal successors, (202), 122 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:04,546 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2022-01-31 21:30:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 21:30:04,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:04,546 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:04,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 21:30:04,546 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash 671791144, now seen corresponding path program 43 times [2022-01-31 21:30:04,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:04,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985709912] [2022-01-31 21:30:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:04,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:04,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:04,613 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:04,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:04,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:04,696 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:04,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:05,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:05,242 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 21:30:07,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:07,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985709912] [2022-01-31 21:30:07,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [985709912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:07,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:07,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 21:30:07,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97929486] [2022-01-31 21:30:07,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:07,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 21:30:07,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 21:30:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4929, Invalid=11583, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:30:07,471 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand has 126 states, 126 states have (on average 1.6428571428571428) internal successors, (207), 125 states have internal predecessors, (207), 2 states have call successors, (3), 3 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 21:30:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:15,400 INFO L93 Difference]: Finished difference Result 573 states and 584 transitions. [2022-01-31 21:30:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 21:30:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.6428571428571428) internal successors, (207), 125 states have internal predecessors, (207), 2 states have call successors, (3), 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 211 [2022-01-31 21:30:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:15,401 INFO L225 Difference]: With dead ends: 573 [2022-01-31 21:30:15,401 INFO L226 Difference]: Without dead ends: 369 [2022-01-31 21:30:15,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18665 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=14426, Invalid=48826, Unknown=0, NotChecked=0, Total=63252 [2022-01-31 21:30:15,408 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 492 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 12650 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 12650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:15,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 39 Invalid, 13184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 12650 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-31 21:30:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-31 21:30:15,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2022-01-31 21:30:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 364 states have (on average 1.0137362637362637) internal successors, (369), 364 states have internal predecessors, (369), 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 21:30:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 373 transitions. [2022-01-31 21:30:15,447 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 373 transitions. Word has length 211 [2022-01-31 21:30:15,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:15,447 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 373 transitions. [2022-01-31 21:30:15,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.6428571428571428) internal successors, (207), 125 states have internal predecessors, (207), 2 states have call successors, (3), 3 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 21:30:15,447 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 373 transitions. [2022-01-31 21:30:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 21:30:15,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:15,448 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:15,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 21:30:15,448 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash 811881792, now seen corresponding path program 44 times [2022-01-31 21:30:15,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:15,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846652026] [2022-01-31 21:30:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:15,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:15,519 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:15,520 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:15,532 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:15,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:15,564 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:15,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:16,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:16,038 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 21:30:18,174 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:18,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846652026] [2022-01-31 21:30:18,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [846652026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:18,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:18,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 21:30:18,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884942916] [2022-01-31 21:30:18,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:18,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 21:30:18,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:18,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 21:30:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4922, Invalid=11334, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 21:30:18,180 INFO L87 Difference]: Start difference. First operand 369 states and 373 transitions. Second operand has 128 states, 128 states have (on average 1.640625) internal successors, (210), 127 states have internal predecessors, (210), 2 states have call successors, (3), 3 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 21:30:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:25,232 INFO L93 Difference]: Finished difference Result 581 states and 595 transitions. [2022-01-31 21:30:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 21:30:25,232 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.640625) internal successors, (210), 127 states have internal predecessors, (210), 2 states have call successors, (3), 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 214 [2022-01-31 21:30:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:25,233 INFO L225 Difference]: With dead ends: 581 [2022-01-31 21:30:25,233 INFO L226 Difference]: Without dead ends: 376 [2022-01-31 21:30:25,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18521 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14760, Invalid=48996, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 21:30:25,237 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 415 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 12726 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 12947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 12726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:25,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 44 Invalid, 12947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 12726 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 21:30:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-31 21:30:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 220. [2022-01-31 21:30:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 215 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 21:30:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-01-31 21:30:25,246 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 214 [2022-01-31 21:30:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:25,246 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-01-31 21:30:25,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.640625) internal successors, (210), 127 states have internal predecessors, (210), 2 states have call successors, (3), 3 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 21:30:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-01-31 21:30:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 21:30:25,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:25,247 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:25,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 21:30:25,247 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1508078311, now seen corresponding path program 45 times [2022-01-31 21:30:25,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:25,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446197153] [2022-01-31 21:30:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:25,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:25,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:25,310 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:25,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:25,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:25,374 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:25,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:26,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:26,175 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 21:30:28,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:28,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446197153] [2022-01-31 21:30:28,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1446197153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:28,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:28,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 21:30:28,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526365285] [2022-01-31 21:30:28,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:28,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 21:30:28,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 21:30:28,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5147, Invalid=11883, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:30:28,272 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 131 states, 131 states have (on average 1.6412213740458015) internal successors, (215), 130 states have internal predecessors, (215), 2 states have call successors, (3), 3 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 21:30:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:36,664 INFO L93 Difference]: Finished difference Result 437 states and 448 transitions. [2022-01-31 21:30:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 21:30:36,665 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.6412213740458015) internal successors, (215), 130 states have internal predecessors, (215), 2 states have call successors, (3), 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 219 [2022-01-31 21:30:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:36,665 INFO L225 Difference]: With dead ends: 437 [2022-01-31 21:30:36,665 INFO L226 Difference]: Without dead ends: 225 [2022-01-31 21:30:36,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19414 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=15435, Invalid=51387, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 21:30:36,668 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 427 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13470 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 14031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 13470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:36,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 64 Invalid, 14031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 13470 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-31 21:30:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-31 21:30:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-01-31 21:30:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 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 21:30:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-01-31 21:30:36,676 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 219 [2022-01-31 21:30:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:36,676 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-01-31 21:30:36,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.6412213740458015) internal successors, (215), 130 states have internal predecessors, (215), 2 states have call successors, (3), 3 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 21:30:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-01-31 21:30:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 21:30:36,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:36,677 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:36,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 21:30:36,677 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:36,677 INFO L85 PathProgramCache]: Analyzing trace with hash 302861364, now seen corresponding path program 46 times [2022-01-31 21:30:36,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:36,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271314383] [2022-01-31 21:30:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:36,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:36,746 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:36,746 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:36,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:36,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:36,798 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:36,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:37,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:37,541 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 21:30:39,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271314383] [2022-01-31 21:30:39,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [271314383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:39,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:39,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 21:30:39,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035581287] [2022-01-31 21:30:39,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:39,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 21:30:39,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 21:30:39,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5377, Invalid=12445, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 21:30:39,953 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 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 21:30:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:48,441 INFO L93 Difference]: Finished difference Result 447 states and 458 transitions. [2022-01-31 21:30:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 21:30:48,442 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 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 224 [2022-01-31 21:30:48,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:48,442 INFO L225 Difference]: With dead ends: 447 [2022-01-31 21:30:48,442 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 21:30:48,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20328 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=16125, Invalid=53835, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 21:30:48,449 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 522 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 14159 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 14819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 14159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:48,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 94 Invalid, 14819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 14159 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-01-31 21:30:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 21:30:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-01-31 21:30:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 225 states have internal predecessors, (229), 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 21:30:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 233 transitions. [2022-01-31 21:30:48,457 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 233 transitions. Word has length 224 [2022-01-31 21:30:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:48,457 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 233 transitions. [2022-01-31 21:30:48,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 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 21:30:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 233 transitions. [2022-01-31 21:30:48,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 21:30:48,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:48,458 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:48,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 21:30:48,460 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash 811252005, now seen corresponding path program 47 times [2022-01-31 21:30:48,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:48,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587611921] [2022-01-31 21:30:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:48,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:48,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:48,512 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:48,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:48,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:48,553 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:48,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:49,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:49,092 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 21:30:52,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587611921] [2022-01-31 21:30:52,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [587611921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:52,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:52,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 21:30:52,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345363294] [2022-01-31 21:30:52,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:52,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 21:30:52,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 21:30:52,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5612, Invalid=13020, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 21:30:52,192 INFO L87 Difference]: Start difference. First operand 230 states and 233 transitions. Second operand has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 states have internal predecessors, (225), 2 states have call successors, (3), 3 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 21:31:00,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:00,969 INFO L93 Difference]: Finished difference Result 457 states and 468 transitions. [2022-01-31 21:31:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 21:31:00,969 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 states have internal predecessors, (225), 2 states have call successors, (3), 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 229 [2022-01-31 21:31:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:00,970 INFO L225 Difference]: With dead ends: 457 [2022-01-31 21:31:00,970 INFO L226 Difference]: Without dead ends: 235 [2022-01-31 21:31:00,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21310 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=16830, Invalid=56340, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 21:31:00,973 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 447 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14776 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 14776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:00,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 39 Invalid, 15363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 14776 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-31 21:31:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-31 21:31:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-01-31 21:31:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 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 21:31:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2022-01-31 21:31:00,981 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 229 [2022-01-31 21:31:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:00,982 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2022-01-31 21:31:00,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 states have internal predecessors, (225), 2 states have call successors, (3), 3 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 21:31:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2022-01-31 21:31:00,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 21:31:00,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:00,983 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:00,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 21:31:00,983 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:00,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2042834216, now seen corresponding path program 48 times [2022-01-31 21:31:00,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:00,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772467267] [2022-01-31 21:31:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:01,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:01,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:01,073 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:01,096 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:01,149 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:01,149 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:01,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:01,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:01,848 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 21:31:04,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:04,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772467267] [2022-01-31 21:31:04,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [772467267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:04,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:04,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 21:31:04,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578773396] [2022-01-31 21:31:04,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:04,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 21:31:04,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 21:31:04,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5852, Invalid=13608, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 21:31:04,557 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 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 21:31:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:13,153 INFO L93 Difference]: Finished difference Result 467 states and 478 transitions. [2022-01-31 21:31:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 21:31:13,154 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 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 234 [2022-01-31 21:31:13,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:13,155 INFO L225 Difference]: With dead ends: 467 [2022-01-31 21:31:13,155 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 21:31:13,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22219 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=17550, Invalid=58902, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 21:31:13,159 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 546 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15481 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 15481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:13,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 29 Invalid, 16171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 15481 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-31 21:31:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 21:31:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-01-31 21:31:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 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 21:31:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-01-31 21:31:13,167 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 234 [2022-01-31 21:31:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:13,167 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-01-31 21:31:13,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 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 21:31:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-01-31 21:31:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 21:31:13,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:13,169 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:13,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 21:31:13,169 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1308465969, now seen corresponding path program 49 times [2022-01-31 21:31:13,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:13,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491068332] [2022-01-31 21:31:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:13,213 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:13,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:13,237 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:13,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:13,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:13,289 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:13,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:17,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:17,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491068332] [2022-01-31 21:31:17,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [491068332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:17,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:17,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 21:31:17,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125145873] [2022-01-31 21:31:17,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:17,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 21:31:17,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:17,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 21:31:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6097, Invalid=14209, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:31:17,193 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 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 21:31:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:26,591 INFO L93 Difference]: Finished difference Result 477 states and 488 transitions. [2022-01-31 21:31:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 21:31:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 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 239 [2022-01-31 21:31:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:26,592 INFO L225 Difference]: With dead ends: 477 [2022-01-31 21:31:26,592 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 21:31:26,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23196 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=18285, Invalid=61521, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 21:31:26,596 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 373 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 16225 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 16749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 16225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:26,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 64 Invalid, 16749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 16225 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-31 21:31:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 21:31:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-01-31 21:31:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 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 21:31:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2022-01-31 21:31:26,604 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 239 [2022-01-31 21:31:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:26,605 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2022-01-31 21:31:26,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 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 21:31:26,605 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2022-01-31 21:31:26,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-31 21:31:26,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:26,606 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:26,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 21:31:26,606 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash -124602340, now seen corresponding path program 50 times [2022-01-31 21:31:26,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:26,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977683062] [2022-01-31 21:31:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:26,662 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:26,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:26,678 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:26,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:26,730 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:26,731 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:26,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:27,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:27,670 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 21:31:30,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:30,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977683062] [2022-01-31 21:31:30,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [977683062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:30,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:30,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 21:31:30,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365214032] [2022-01-31 21:31:30,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:30,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 21:31:30,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:30,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 21:31:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6347, Invalid=14823, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 21:31:30,455 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 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 21:31:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:39,422 INFO L93 Difference]: Finished difference Result 487 states and 498 transitions. [2022-01-31 21:31:39,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 21:31:39,422 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 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 244 [2022-01-31 21:31:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:39,423 INFO L225 Difference]: With dead ends: 487 [2022-01-31 21:31:39,423 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 21:31:39,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24194 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=19035, Invalid=64197, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 21:31:39,426 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 383 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 16912 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 17444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 16912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:39,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 54 Invalid, 17444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 16912 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-01-31 21:31:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 21:31:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-01-31 21:31:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0163265306122449) internal successors, (249), 245 states have internal predecessors, (249), 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 21:31:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 253 transitions. [2022-01-31 21:31:39,435 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 253 transitions. Word has length 244 [2022-01-31 21:31:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:39,435 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 253 transitions. [2022-01-31 21:31:39,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 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 21:31:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 253 transitions. [2022-01-31 21:31:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 21:31:39,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:39,436 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:39,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 21:31:39,436 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1718062275, now seen corresponding path program 51 times [2022-01-31 21:31:39,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:39,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546787507] [2022-01-31 21:31:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:39,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:39,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:39,494 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:39,506 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:39,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:39,531 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:39,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:40,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:40,128 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 21:31:43,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:43,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546787507] [2022-01-31 21:31:43,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [546787507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:43,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:43,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 21:31:43,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386436232] [2022-01-31 21:31:43,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:43,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 21:31:43,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:43,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 21:31:43,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6602, Invalid=15450, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 21:31:43,900 INFO L87 Difference]: Start difference. First operand 250 states and 253 transitions. Second operand has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 states have internal predecessors, (245), 2 states have call successors, (3), 3 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 21:31:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:53,039 INFO L93 Difference]: Finished difference Result 497 states and 508 transitions. [2022-01-31 21:31:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 21:31:53,039 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 states have internal predecessors, (245), 2 states have call successors, (3), 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 249 [2022-01-31 21:31:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:53,040 INFO L225 Difference]: With dead ends: 497 [2022-01-31 21:31:53,040 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 21:31:53,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25213 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=19800, Invalid=66930, Unknown=0, NotChecked=0, Total=86730 [2022-01-31 21:31:53,047 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 487 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17598 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 17598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:53,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 29 Invalid, 18138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 17598 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-01-31 21:31:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 21:31:53,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-01-31 21:31:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 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 21:31:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-01-31 21:31:53,071 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 249 [2022-01-31 21:31:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:53,071 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-01-31 21:31:53,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 states have internal predecessors, (245), 2 states have call successors, (3), 3 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 21:31:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-01-31 21:31:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 21:31:53,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:53,072 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:53,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 21:31:53,073 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:53,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1095281936, now seen corresponding path program 52 times [2022-01-31 21:31:53,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:53,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350976468] [2022-01-31 21:31:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:53,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:53,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:53,131 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:53,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:53,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:53,183 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:53,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:54,277 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 21:31:57,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:57,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350976468] [2022-01-31 21:31:57,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350976468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:57,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:57,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 21:31:57,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460189861] [2022-01-31 21:31:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:57,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 21:31:57,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:57,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 21:31:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7077, Invalid=16793, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 21:31:57,612 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 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 21:32:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:07,876 INFO L93 Difference]: Finished difference Result 693 states and 704 transitions. [2022-01-31 21:32:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 21:32:07,876 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 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 254 [2022-01-31 21:32:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:07,884 INFO L225 Difference]: With dead ends: 693 [2022-01-31 21:32:07,884 INFO L226 Difference]: Without dead ends: 446 [2022-01-31 21:32:07,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27180 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=20800, Invalid=71312, Unknown=0, NotChecked=0, Total=92112 [2022-01-31 21:32:07,887 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 497 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 18896 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 19444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 18896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:07,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 54 Invalid, 19444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 18896 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-01-31 21:32:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-31 21:32:07,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2022-01-31 21:32:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 441 states have (on average 1.0113378684807257) internal successors, (446), 441 states have internal predecessors, (446), 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 21:32:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 450 transitions. [2022-01-31 21:32:07,932 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 450 transitions. Word has length 254 [2022-01-31 21:32:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:07,932 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 450 transitions. [2022-01-31 21:32:07,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 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 21:32:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 450 transitions. [2022-01-31 21:32:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 21:32:07,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:07,933 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:07,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 21:32:07,933 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1325818414, now seen corresponding path program 53 times [2022-01-31 21:32:07,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:07,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077173010] [2022-01-31 21:32:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:07,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:08,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:08,020 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:08,047 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:08,084 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:08,084 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:08,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:09,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:09,051 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 21:32:12,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077173010] [2022-01-31 21:32:12,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077173010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:12,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:12,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-01-31 21:32:12,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652940441] [2022-01-31 21:32:12,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:12,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-01-31 21:32:12,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-01-31 21:32:12,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7288, Invalid=17204, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 21:32:12,484 INFO L87 Difference]: Start difference. First operand 446 states and 450 transitions. Second operand has 154 states, 154 states have (on average 1.6428571428571428) internal successors, (253), 153 states have internal predecessors, (253), 2 states have call successors, (3), 3 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 21:32:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:21,690 INFO L93 Difference]: Finished difference Result 697 states and 707 transitions. [2022-01-31 21:32:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-31 21:32:21,690 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.6428571428571428) internal successors, (253), 153 states have internal predecessors, (253), 2 states have call successors, (3), 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 257 [2022-01-31 21:32:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:21,691 INFO L225 Difference]: With dead ends: 697 [2022-01-31 21:32:21,691 INFO L226 Difference]: Without dead ends: 449 [2022-01-31 21:32:21,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27941 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=21427, Invalid=73129, Unknown=0, NotChecked=0, Total=94556 [2022-01-31 21:32:21,694 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 600 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19090 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 19090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:21,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 39 Invalid, 19741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 19090 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-31 21:32:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-31 21:32:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2022-01-31 21:32:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 444 states have (on average 1.0112612612612613) internal successors, (449), 444 states have internal predecessors, (449), 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 21:32:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 453 transitions. [2022-01-31 21:32:21,712 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 453 transitions. Word has length 257 [2022-01-31 21:32:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:21,712 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 453 transitions. [2022-01-31 21:32:21,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.6428571428571428) internal successors, (253), 153 states have internal predecessors, (253), 2 states have call successors, (3), 3 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 21:32:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 453 transitions. [2022-01-31 21:32:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 21:32:21,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:21,713 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:21,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 21:32:21,713 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:21,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776570, now seen corresponding path program 54 times [2022-01-31 21:32:21,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:21,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795903026] [2022-01-31 21:32:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:21,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:21,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:21,781 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:21,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:21,848 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:21,848 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:21,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:22,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:22,746 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 21:32:25,749 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:25,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795903026] [2022-01-31 21:32:25,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [795903026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:25,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:25,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-01-31 21:32:25,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391386100] [2022-01-31 21:32:25,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:25,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-01-31 21:32:25,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-01-31 21:32:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7281, Invalid=16899, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 21:32:25,751 INFO L87 Difference]: Start difference. First operand 449 states and 453 transitions. Second operand has 156 states, 156 states have (on average 1.641025641025641) internal successors, (256), 155 states have internal predecessors, (256), 2 states have call successors, (3), 3 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 21:32:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:35,301 INFO L93 Difference]: Finished difference Result 707 states and 723 transitions. [2022-01-31 21:32:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-31 21:32:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.641025641025641) internal successors, (256), 155 states have internal predecessors, (256), 2 states have call successors, (3), 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 260 [2022-01-31 21:32:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:35,302 INFO L225 Difference]: With dead ends: 707 [2022-01-31 21:32:35,302 INFO L226 Difference]: Without dead ends: 458 [2022-01-31 21:32:35,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27763 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=21837, Invalid=73335, Unknown=0, NotChecked=0, Total=95172 [2022-01-31 21:32:35,306 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 306 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19239 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 19239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:35,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 39 Invalid, 19604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 19239 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-31 21:32:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-31 21:32:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 266. [2022-01-31 21:32:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.0153256704980842) internal successors, (265), 261 states have internal predecessors, (265), 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 21:32:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 269 transitions. [2022-01-31 21:32:35,316 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 269 transitions. Word has length 260 [2022-01-31 21:32:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:35,316 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 269 transitions. [2022-01-31 21:32:35,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.641025641025641) internal successors, (256), 155 states have internal predecessors, (256), 2 states have call successors, (3), 3 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 21:32:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 269 transitions. [2022-01-31 21:32:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 21:32:35,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:35,317 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:35,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 21:32:35,317 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:35,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2082080801, now seen corresponding path program 55 times [2022-01-31 21:32:35,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:35,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505818326] [2022-01-31 21:32:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:35,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:35,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:35,366 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:35,383 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:35,409 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:35,409 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:35,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:36,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:32:39,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:39,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505818326] [2022-01-31 21:32:39,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [505818326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:39,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:39,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-01-31 21:32:39,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568158778] [2022-01-31 21:32:39,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:39,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-01-31 21:32:39,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:39,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-01-31 21:32:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7554, Invalid=17568, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 21:32:39,287 INFO L87 Difference]: Start difference. First operand 266 states and 269 transitions. Second operand has 159 states, 159 states have (on average 1.6415094339622642) internal successors, (261), 158 states have internal predecessors, (261), 2 states have call successors, (3), 3 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 21:32:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:51,365 INFO L93 Difference]: Finished difference Result 529 states and 540 transitions. [2022-01-31 21:32:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-31 21:32:51,365 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.6415094339622642) internal successors, (261), 158 states have internal predecessors, (261), 2 states have call successors, (3), 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 265 [2022-01-31 21:32:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:51,366 INFO L225 Difference]: With dead ends: 529 [2022-01-31 21:32:51,366 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 21:32:51,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28854 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=22656, Invalid=76254, Unknown=0, NotChecked=0, Total=98910 [2022-01-31 21:32:51,370 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 517 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 20006 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 20685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 20006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:51,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 69 Invalid, 20685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 20006 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-01-31 21:32:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 21:32:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-01-31 21:32:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0150375939849625) internal successors, (270), 266 states have internal predecessors, (270), 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 21:32:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 274 transitions. [2022-01-31 21:32:51,379 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 274 transitions. Word has length 265 [2022-01-31 21:32:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:51,379 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 274 transitions. [2022-01-31 21:32:51,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.6415094339622642) internal successors, (261), 158 states have internal predecessors, (261), 2 states have call successors, (3), 3 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 21:32:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 274 transitions. [2022-01-31 21:32:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 21:32:51,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:51,386 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:51,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 21:32:51,387 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:51,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1405359954, now seen corresponding path program 56 times [2022-01-31 21:32:51,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:51,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764503845] [2022-01-31 21:32:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:51,424 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:51,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:51,440 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:51,452 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:51,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:51,478 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:51,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:52,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:52,636 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 21:32:57,003 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:57,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764503845] [2022-01-31 21:32:57,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764503845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:57,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:57,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-01-31 21:32:57,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458015039] [2022-01-31 21:32:57,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:57,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-01-31 21:32:57,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-01-31 21:32:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7832, Invalid=18250, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 21:32:57,006 INFO L87 Difference]: Start difference. First operand 271 states and 274 transitions. Second operand has 162 states, 162 states have (on average 1.6419753086419753) internal successors, (266), 161 states have internal predecessors, (266), 2 states have call successors, (3), 3 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 21:33:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:11,502 INFO L93 Difference]: Finished difference Result 539 states and 550 transitions. [2022-01-31 21:33:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-01-31 21:33:11,502 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 1.6419753086419753) internal successors, (266), 161 states have internal predecessors, (266), 2 states have call successors, (3), 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 270 [2022-01-31 21:33:11,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:11,503 INFO L225 Difference]: With dead ends: 539 [2022-01-31 21:33:11,503 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 21:33:11,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29966 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=23490, Invalid=79230, Unknown=0, NotChecked=0, Total=102720 [2022-01-31 21:33:11,507 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 524 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 20718 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 20718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:11,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 44 Invalid, 21202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 20718 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-01-31 21:33:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 21:33:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-01-31 21:33:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 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 21:33:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 279 transitions. [2022-01-31 21:33:11,516 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 279 transitions. Word has length 270 [2022-01-31 21:33:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:11,516 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 279 transitions. [2022-01-31 21:33:11,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 1.6419753086419753) internal successors, (266), 161 states have internal predecessors, (266), 2 states have call successors, (3), 3 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 21:33:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 279 transitions. [2022-01-31 21:33:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 21:33:11,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:11,517 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:11,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 21:33:11,517 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:11,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1860301461, now seen corresponding path program 57 times [2022-01-31 21:33:11,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:11,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162291855] [2022-01-31 21:33:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:11,570 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:11,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:11,593 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:11,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:11,666 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:11,666 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:11,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:12,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:12,826 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 21:33:17,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:17,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162291855] [2022-01-31 21:33:17,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162291855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:17,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:17,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-01-31 21:33:17,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724506009] [2022-01-31 21:33:17,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:17,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-01-31 21:33:17,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:17,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-01-31 21:33:17,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8115, Invalid=18945, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 21:33:17,326 INFO L87 Difference]: Start difference. First operand 276 states and 279 transitions. Second operand has 165 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 164 states have internal predecessors, (271), 2 states have call successors, (3), 3 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 21:33:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:30,897 INFO L93 Difference]: Finished difference Result 549 states and 560 transitions. [2022-01-31 21:33:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 21:33:30,897 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 164 states have internal predecessors, (271), 2 states have call successors, (3), 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 275 [2022-01-31 21:33:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:30,898 INFO L225 Difference]: With dead ends: 549 [2022-01-31 21:33:30,898 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 21:33:30,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31099 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=24339, Invalid=82263, Unknown=0, NotChecked=0, Total=106602 [2022-01-31 21:33:30,903 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 536 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 21714 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 22417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 21714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:30,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 54 Invalid, 22417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 21714 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-01-31 21:33:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 21:33:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-01-31 21:33:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 276 states have internal predecessors, (280), 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 21:33:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 284 transitions. [2022-01-31 21:33:30,912 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 284 transitions. Word has length 275 [2022-01-31 21:33:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:30,912 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 284 transitions. [2022-01-31 21:33:30,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 164 states have internal predecessors, (271), 2 states have call successors, (3), 3 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 21:33:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 284 transitions. [2022-01-31 21:33:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-31 21:33:30,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:30,932 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:30,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 21:33:30,932 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:30,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1603072034, now seen corresponding path program 58 times [2022-01-31 21:33:30,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:30,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019604895] [2022-01-31 21:33:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:30,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:30,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:30,986 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:31,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:31,067 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:31,067 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:31,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:31,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:31,902 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 21:33:35,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:35,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019604895] [2022-01-31 21:33:35,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019604895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:35,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:35,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 21:33:35,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647354436] [2022-01-31 21:33:35,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:35,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 21:33:35,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:35,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 21:33:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8640, Invalid=20430, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 21:33:35,018 INFO L87 Difference]: Start difference. First operand 281 states and 284 transitions. Second operand has 168 states, 168 states have (on average 1.6428571428571428) internal successors, (276), 167 states have internal predecessors, (276), 2 states have call successors, (3), 3 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 21:33:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:46,856 INFO L93 Difference]: Finished difference Result 765 states and 776 transitions. [2022-01-31 21:33:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-31 21:33:46,857 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.6428571428571428) internal successors, (276), 167 states have internal predecessors, (276), 2 states have call successors, (3), 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 280 [2022-01-31 21:33:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:46,858 INFO L225 Difference]: With dead ends: 765 [2022-01-31 21:33:46,858 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 21:33:46,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33278 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=25445, Invalid=87115, Unknown=0, NotChecked=0, Total=112560 [2022-01-31 21:33:46,875 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 439 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 22677 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 22677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:46,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 39 Invalid, 23172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 22677 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-01-31 21:33:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 21:33:46,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2022-01-31 21:33:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 487 states have (on average 1.0102669404517455) internal successors, (492), 487 states have internal predecessors, (492), 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 21:33:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 496 transitions. [2022-01-31 21:33:46,894 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 496 transitions. Word has length 280 [2022-01-31 21:33:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:46,894 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 496 transitions. [2022-01-31 21:33:46,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.6428571428571428) internal successors, (276), 167 states have internal predecessors, (276), 2 states have call successors, (3), 3 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 21:33:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 496 transitions. [2022-01-31 21:33:46,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 21:33:46,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:46,895 INFO L514 BasicCegarLoop]: trace histogram [106, 105, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:46,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 21:33:46,895 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:46,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2121099876, now seen corresponding path program 59 times [2022-01-31 21:33:46,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:46,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124170644] [2022-01-31 21:33:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:46,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:46,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:46,938 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:46,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:46,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:46,979 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:46,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:48,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:48,025 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 21:33:51,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:51,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124170644] [2022-01-31 21:33:51,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2124170644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:51,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:51,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-01-31 21:33:51,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691777742] [2022-01-31 21:33:51,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:51,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-01-31 21:33:51,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:51,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-01-31 21:33:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8633, Invalid=20097, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 21:33:51,928 INFO L87 Difference]: Start difference. First operand 492 states and 496 transitions. Second operand has 170 states, 170 states have (on average 1.6411764705882352) internal successors, (279), 169 states have internal predecessors, (279), 2 states have call successors, (3), 3 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 21:34:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:34:03,529 INFO L93 Difference]: Finished difference Result 773 states and 787 transitions. [2022-01-31 21:34:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-31 21:34:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.6411764705882352) internal successors, (279), 169 states have internal predecessors, (279), 2 states have call successors, (3), 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 283 [2022-01-31 21:34:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:34:03,531 INFO L225 Difference]: With dead ends: 773 [2022-01-31 21:34:03,531 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 21:34:03,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33083 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=25893, Invalid=87339, Unknown=0, NotChecked=0, Total=113232 [2022-01-31 21:34:03,535 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 551 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22942 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 23341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 22942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:34:03,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 79 Invalid, 23341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 22942 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-01-31 21:34:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 21:34:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 289. [2022-01-31 21:34:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0140845070422535) internal successors, (288), 284 states have internal predecessors, (288), 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 21:34:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 292 transitions. [2022-01-31 21:34:03,545 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 292 transitions. Word has length 283 [2022-01-31 21:34:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:34:03,545 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 292 transitions. [2022-01-31 21:34:03,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.6411764705882352) internal successors, (279), 169 states have internal predecessors, (279), 2 states have call successors, (3), 3 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 21:34:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 292 transitions. [2022-01-31 21:34:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-01-31 21:34:03,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:34:03,546 INFO L514 BasicCegarLoop]: trace histogram [108, 107, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:34:03,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 21:34:03,546 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:34:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:34:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1243806703, now seen corresponding path program 60 times [2022-01-31 21:34:03,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:34:03,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115139492] [2022-01-31 21:34:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:34:03,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:03,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:03,595 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:03,607 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:03,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:03,634 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:03,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:34:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:04,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:34:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:04,394 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 21:34:08,440 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:34:08,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115139492] [2022-01-31 21:34:08,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115139492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:34:08,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:34:08,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2022-01-31 21:34:08,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379613360] [2022-01-31 21:34:08,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:34:08,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-01-31 21:34:08,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:34:08,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-01-31 21:34:08,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8930, Invalid=20826, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 21:34:08,443 INFO L87 Difference]: Start difference. First operand 289 states and 292 transitions. Second operand has 173 states, 173 states have (on average 1.6416184971098267) internal successors, (284), 172 states have internal predecessors, (284), 2 states have call successors, (3), 3 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 21:34:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:34:20,875 INFO L93 Difference]: Finished difference Result 575 states and 586 transitions. [2022-01-31 21:34:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-01-31 21:34:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.6416184971098267) internal successors, (284), 172 states have internal predecessors, (284), 2 states have call successors, (3), 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 288 [2022-01-31 21:34:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:34:20,876 INFO L225 Difference]: With dead ends: 575 [2022-01-31 21:34:20,876 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 21:34:20,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34273 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=26784, Invalid=90522, Unknown=0, NotChecked=0, Total=117306 [2022-01-31 21:34:20,882 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 23653 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 24055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 23653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:34:20,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 49 Invalid, 24055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 23653 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-01-31 21:34:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 21:34:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-01-31 21:34:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 289 states have (on average 1.013840830449827) internal successors, (293), 289 states have internal predecessors, (293), 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 21:34:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 297 transitions. [2022-01-31 21:34:20,892 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 297 transitions. Word has length 288 [2022-01-31 21:34:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:34:20,892 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 297 transitions. [2022-01-31 21:34:20,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.6416184971098267) internal successors, (284), 172 states have internal predecessors, (284), 2 states have call successors, (3), 3 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 21:34:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 297 transitions. [2022-01-31 21:34:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 21:34:20,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:34:20,894 INFO L514 BasicCegarLoop]: trace histogram [110, 109, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:34:20,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 21:34:20,894 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:34:20,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:34:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash -43299608, now seen corresponding path program 61 times [2022-01-31 21:34:20,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:34:20,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792655792] [2022-01-31 21:34:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:34:20,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:20,962 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:20,962 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:20,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:21,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:21,021 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:21,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:34:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:22,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:34:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:22,294 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 21:34:26,042 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:34:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792655792] [2022-01-31 21:34:26,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [792655792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:34:26,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:34:26,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2022-01-31 21:34:26,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480802256] [2022-01-31 21:34:26,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:34:26,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-01-31 21:34:26,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:34:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-01-31 21:34:26,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9232, Invalid=21568, Unknown=0, NotChecked=0, Total=30800 [2022-01-31 21:34:26,049 INFO L87 Difference]: Start difference. First operand 294 states and 297 transitions. Second operand has 176 states, 176 states have (on average 1.6420454545454546) internal successors, (289), 175 states have internal predecessors, (289), 2 states have call successors, (3), 3 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 21:34:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:34:39,779 INFO L93 Difference]: Finished difference Result 585 states and 596 transitions. [2022-01-31 21:34:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-01-31 21:34:39,780 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.6420454545454546) internal successors, (289), 175 states have internal predecessors, (289), 2 states have call successors, (3), 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 293 [2022-01-31 21:34:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:34:39,782 INFO L225 Difference]: With dead ends: 585 [2022-01-31 21:34:39,782 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 21:34:39,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35484 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=27690, Invalid=93762, Unknown=0, NotChecked=0, Total=121452 [2022-01-31 21:34:39,787 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 572 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24575 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 24575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:34:39,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 34 Invalid, 25213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 24575 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-01-31 21:34:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 21:34:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-01-31 21:34:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0136054421768708) internal successors, (298), 294 states have internal predecessors, (298), 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 21:34:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 302 transitions. [2022-01-31 21:34:39,806 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 302 transitions. Word has length 293 [2022-01-31 21:34:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:34:39,807 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 302 transitions. [2022-01-31 21:34:39,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.6420454545454546) internal successors, (289), 175 states have internal predecessors, (289), 2 states have call successors, (3), 3 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 21:34:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 302 transitions. [2022-01-31 21:34:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 21:34:39,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:34:39,824 INFO L514 BasicCegarLoop]: trace histogram [112, 111, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:34:39,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 21:34:39,824 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:34:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:34:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash -986857019, now seen corresponding path program 62 times [2022-01-31 21:34:39,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:34:39,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820907024] [2022-01-31 21:34:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:34:39,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:39,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:39,890 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:39,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:39,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:39,952 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:39,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:34:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:41,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:34:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:41,189 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 21:34:45,300 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:34:45,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820907024] [2022-01-31 21:34:45,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [820907024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:34:45,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:34:45,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [179] imperfect sequences [] total 179 [2022-01-31 21:34:45,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656768471] [2022-01-31 21:34:45,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:34:45,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-01-31 21:34:45,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:34:45,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-01-31 21:34:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9539, Invalid=22323, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 21:34:45,304 INFO L87 Difference]: Start difference. First operand 299 states and 302 transitions. Second operand has 179 states, 179 states have (on average 1.6424581005586592) internal successors, (294), 178 states have internal predecessors, (294), 2 states have call successors, (3), 3 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 21:35:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:35:00,523 INFO L93 Difference]: Finished difference Result 595 states and 606 transitions. [2022-01-31 21:35:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-01-31 21:35:00,524 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 1.6424581005586592) internal successors, (294), 178 states have internal predecessors, (294), 2 states have call successors, (3), 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 298 [2022-01-31 21:35:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:35:00,524 INFO L225 Difference]: With dead ends: 595 [2022-01-31 21:35:00,525 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 21:35:00,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36716 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=28611, Invalid=97059, Unknown=0, NotChecked=0, Total=125670 [2022-01-31 21:35:00,529 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 582 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25510 mSolverCounterSat, 763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 26273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 25510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:35:00,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 44 Invalid, 26273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 25510 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-01-31 21:35:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 21:35:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-01-31 21:35:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.0133779264214047) internal successors, (303), 299 states have internal predecessors, (303), 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 21:35:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 307 transitions. [2022-01-31 21:35:00,538 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 307 transitions. Word has length 298 [2022-01-31 21:35:00,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:35:00,538 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 307 transitions. [2022-01-31 21:35:00,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 1.6424581005586592) internal successors, (294), 178 states have internal predecessors, (294), 2 states have call successors, (3), 3 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 21:35:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 307 transitions. [2022-01-31 21:35:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 21:35:00,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:35:00,539 INFO L514 BasicCegarLoop]: trace histogram [114, 113, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:35:00,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 21:35:00,539 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:35:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:35:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 258665012, now seen corresponding path program 63 times [2022-01-31 21:35:00,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:35:00,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847188335] [2022-01-31 21:35:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:35:00,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:00,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:00,593 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:00,608 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:00,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:00,632 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:00,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:35:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:01,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:35:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:01,489 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 21:35:05,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:35:05,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847188335] [2022-01-31 21:35:05,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847188335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:35:05,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:35:05,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [182] imperfect sequences [] total 182 [2022-01-31 21:35:05,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730526369] [2022-01-31 21:35:05,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:35:05,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-01-31 21:35:05,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:35:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-01-31 21:35:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9851, Invalid=23091, Unknown=0, NotChecked=0, Total=32942 [2022-01-31 21:35:05,783 INFO L87 Difference]: Start difference. First operand 304 states and 307 transitions. Second operand has 182 states, 182 states have (on average 1.6428571428571428) internal successors, (299), 181 states have internal predecessors, (299), 2 states have call successors, (3), 3 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 21:35:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:35:20,796 INFO L93 Difference]: Finished difference Result 605 states and 616 transitions. [2022-01-31 21:35:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-01-31 21:35:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 1.6428571428571428) internal successors, (299), 181 states have internal predecessors, (299), 2 states have call successors, (3), 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 303 [2022-01-31 21:35:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:35:20,797 INFO L225 Difference]: With dead ends: 605 [2022-01-31 21:35:20,797 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 21:35:20,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37969 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=29547, Invalid=100413, Unknown=0, NotChecked=0, Total=129960 [2022-01-31 21:35:20,802 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 592 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 26529 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 27301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 26529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:35:20,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 69 Invalid, 27301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 26529 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 21:35:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 21:35:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2022-01-31 21:35:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.013157894736842) internal successors, (308), 304 states have internal predecessors, (308), 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 21:35:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 312 transitions. [2022-01-31 21:35:20,812 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 312 transitions. Word has length 303 [2022-01-31 21:35:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:35:20,812 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 312 transitions. [2022-01-31 21:35:20,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 1.6428571428571428) internal successors, (299), 181 states have internal predecessors, (299), 2 states have call successors, (3), 3 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 21:35:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 312 transitions. [2022-01-31 21:35:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-01-31 21:35:20,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:35:20,832 INFO L514 BasicCegarLoop]: trace histogram [116, 115, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:35:20,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 21:35:20,833 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:35:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:35:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash 874248569, now seen corresponding path program 64 times [2022-01-31 21:35:20,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:35:20,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979317548] [2022-01-31 21:35:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:35:20,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:20,896 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:20,896 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:20,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:20,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:20,958 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:20,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:35:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:22,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:35:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:22,041 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 21:35:27,288 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:35:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979317548] [2022-01-31 21:35:27,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1979317548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:35:27,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:35:27,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [185] imperfect sequences [] total 185 [2022-01-31 21:35:27,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747775342] [2022-01-31 21:35:27,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:35:27,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2022-01-31 21:35:27,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:35:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2022-01-31 21:35:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10168, Invalid=23872, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 21:35:27,292 INFO L87 Difference]: Start difference. First operand 309 states and 312 transitions. Second operand has 185 states, 185 states have (on average 1.6432432432432433) internal successors, (304), 184 states have internal predecessors, (304), 2 states have call successors, (3), 3 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 21:35:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:35:43,730 INFO L93 Difference]: Finished difference Result 615 states and 626 transitions. [2022-01-31 21:35:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-31 21:35:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 1.6432432432432433) internal successors, (304), 184 states have internal predecessors, (304), 2 states have call successors, (3), 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 308 [2022-01-31 21:35:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:35:43,731 INFO L225 Difference]: With dead ends: 615 [2022-01-31 21:35:43,732 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 21:35:43,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39307 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=30498, Invalid=103824, Unknown=0, NotChecked=0, Total=134322 [2022-01-31 21:35:43,736 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1077 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27441 mSolverCounterSat, 1148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1148 IncrementalHoareTripleChecker+Valid, 27441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:35:43,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 29 Invalid, 28589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1148 Valid, 27441 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-01-31 21:35:43,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 21:35:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2022-01-31 21:35:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.0129449838187703) internal successors, (313), 309 states have internal predecessors, (313), 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 21:35:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 317 transitions. [2022-01-31 21:35:43,746 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 317 transitions. Word has length 308 [2022-01-31 21:35:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:35:43,746 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 317 transitions. [2022-01-31 21:35:43,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 1.6432432432432433) internal successors, (304), 184 states have internal predecessors, (304), 2 states have call successors, (3), 3 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 21:35:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 317 transitions. [2022-01-31 21:35:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 21:35:43,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:35:43,747 INFO L514 BasicCegarLoop]: trace histogram [118, 117, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:35:43,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 21:35:43,747 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:35:43,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:35:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash 72920448, now seen corresponding path program 65 times [2022-01-31 21:35:43,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:35:43,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375729017] [2022-01-31 21:35:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:35:43,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:43,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:43,823 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:43,836 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:43,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:43,873 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:43,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:35:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:44,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:35:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:44,852 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 21:35:48,899 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:35:48,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375729017] [2022-01-31 21:35:48,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [375729017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:35:48,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:35:48,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [188] imperfect sequences [] total 188 [2022-01-31 21:35:48,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106067564] [2022-01-31 21:35:48,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:35:48,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-01-31 21:35:48,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:35:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-01-31 21:35:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10490, Invalid=24666, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 21:35:48,903 INFO L87 Difference]: Start difference. First operand 314 states and 317 transitions. Second operand has 188 states, 188 states have (on average 1.6436170212765957) internal successors, (309), 187 states have internal predecessors, (309), 2 states have call successors, (3), 3 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 21:36:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:36:03,777 INFO L93 Difference]: Finished difference Result 625 states and 636 transitions. [2022-01-31 21:36:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-01-31 21:36:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.6436170212765957) internal successors, (309), 187 states have internal predecessors, (309), 2 states have call successors, (3), 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 313 [2022-01-31 21:36:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:36:03,778 INFO L225 Difference]: With dead ends: 625 [2022-01-31 21:36:03,778 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 21:36:03,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40538 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=31464, Invalid=107292, Unknown=0, NotChecked=0, Total=138756 [2022-01-31 21:36:03,783 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 853 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 28415 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 29460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 28415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:36:03,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 49 Invalid, 29460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 28415 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-01-31 21:36:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 21:36:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-01-31 21:36:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.0127388535031847) internal successors, (318), 314 states have internal predecessors, (318), 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 21:36:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 322 transitions. [2022-01-31 21:36:03,793 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 322 transitions. Word has length 313 [2022-01-31 21:36:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:36:03,793 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 322 transitions. [2022-01-31 21:36:03,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.6436170212765957) internal successors, (309), 187 states have internal predecessors, (309), 2 states have call successors, (3), 3 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 21:36:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 322 transitions. [2022-01-31 21:36:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 21:36:03,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:36:03,794 INFO L514 BasicCegarLoop]: trace histogram [120, 119, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:36:03,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 21:36:03,794 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:36:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:36:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1983878355, now seen corresponding path program 66 times [2022-01-31 21:36:03,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:36:03,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761850143] [2022-01-31 21:36:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:36:03,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:03,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:03,871 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:03,886 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:03,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:03,910 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:03,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:36:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:36:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:04,889 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 21:36:09,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:36:09,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761850143] [2022-01-31 21:36:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1761850143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:36:09,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:36:09,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [191] imperfect sequences [] total 191 [2022-01-31 21:36:09,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943995490] [2022-01-31 21:36:09,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:36:09,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-01-31 21:36:09,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:36:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-01-31 21:36:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11085, Invalid=26357, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 21:36:09,650 INFO L87 Difference]: Start difference. First operand 319 states and 322 transitions. Second operand has 191 states, 191 states have (on average 1.643979057591623) internal successors, (314), 190 states have internal predecessors, (314), 2 states have call successors, (3), 3 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 21:36:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:36:26,642 INFO L93 Difference]: Finished difference Result 871 states and 882 transitions. [2022-01-31 21:36:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-01-31 21:36:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.643979057591623) internal successors, (314), 190 states have internal predecessors, (314), 2 states have call successors, (3), 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 318 [2022-01-31 21:36:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:36:26,644 INFO L225 Difference]: With dead ends: 871 [2022-01-31 21:36:26,644 INFO L226 Difference]: Without dead ends: 560 [2022-01-31 21:36:26,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43023 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=32718, Invalid=112824, Unknown=0, NotChecked=0, Total=145542 [2022-01-31 21:36:26,649 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 620 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 29818 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 29818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:36:26,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 29 Invalid, 30505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 29818 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-01-31 21:36:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-31 21:36:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-01-31 21:36:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 555 states have (on average 1.009009009009009) internal successors, (560), 555 states have internal predecessors, (560), 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 21:36:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 564 transitions. [2022-01-31 21:36:26,692 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 564 transitions. Word has length 318 [2022-01-31 21:36:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:36:26,692 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 564 transitions. [2022-01-31 21:36:26,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.643979057591623) internal successors, (314), 190 states have internal predecessors, (314), 2 states have call successors, (3), 3 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 21:36:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 564 transitions. [2022-01-31 21:36:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 21:36:26,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:36:26,693 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:36:26,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 21:36:26,693 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:36:26,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:36:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash -360050767, now seen corresponding path program 67 times [2022-01-31 21:36:26,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:36:26,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126837776] [2022-01-31 21:36:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:36:26,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:26,753 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:26,753 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:26,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:26,829 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:26,829 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:26,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:36:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:27,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:36:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:36:32,287 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:36:32,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126837776] [2022-01-31 21:36:32,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [126837776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:36:32,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:36:32,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [] total 193 [2022-01-31 21:36:32,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619089595] [2022-01-31 21:36:32,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:36:32,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-01-31 21:36:32,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:36:32,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-01-31 21:36:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11078, Invalid=25978, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 21:36:32,290 INFO L87 Difference]: Start difference. First operand 560 states and 564 transitions. Second operand has 193 states, 193 states have (on average 1.6424870466321244) internal successors, (317), 192 states have internal predecessors, (317), 2 states have call successors, (3), 3 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 21:36:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:36:48,946 INFO L93 Difference]: Finished difference Result 879 states and 893 transitions. [2022-01-31 21:36:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 21:36:48,947 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.6424870466321244) internal successors, (317), 192 states have internal predecessors, (317), 2 states have call successors, (3), 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 321 [2022-01-31 21:36:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:36:48,948 INFO L225 Difference]: With dead ends: 879 [2022-01-31 21:36:48,948 INFO L226 Difference]: Without dead ends: 567 [2022-01-31 21:36:48,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42799 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=33228, Invalid=113078, Unknown=0, NotChecked=0, Total=146306 [2022-01-31 21:36:48,953 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 749 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 29664 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 30365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 29664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:36:48,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 49 Invalid, 30365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 29664 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-01-31 21:36:48,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-31 21:36:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 327. [2022-01-31 21:36:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.0124223602484472) internal successors, (326), 322 states have internal predecessors, (326), 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 21:36:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 330 transitions. [2022-01-31 21:36:48,963 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 330 transitions. Word has length 321 [2022-01-31 21:36:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:36:48,963 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 330 transitions. [2022-01-31 21:36:48,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.6424870466321244) internal successors, (317), 192 states have internal predecessors, (317), 2 states have call successors, (3), 3 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 21:36:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 330 transitions. [2022-01-31 21:36:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 21:36:48,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:36:48,965 INFO L514 BasicCegarLoop]: trace histogram [123, 122, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:36:48,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 21:36:48,965 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:36:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:36:48,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1955489052, now seen corresponding path program 68 times [2022-01-31 21:36:48,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:36:48,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076964913] [2022-01-31 21:36:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:36:49,009 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:49,024 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:49,024 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:49,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:49,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:49,087 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:49,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:36:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:50,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:36:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:50,258 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 21:36:54,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:36:54,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076964913] [2022-01-31 21:36:54,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076964913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:36:54,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:36:54,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [196] imperfect sequences [] total 196 [2022-01-31 21:36:54,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524216099] [2022-01-31 21:36:54,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:36:54,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2022-01-31 21:36:54,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:36:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2022-01-31 21:36:54,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11414, Invalid=26806, Unknown=0, NotChecked=0, Total=38220 [2022-01-31 21:36:54,815 INFO L87 Difference]: Start difference. First operand 327 states and 330 transitions. Second operand has 196 states, 196 states have (on average 1.6428571428571428) internal successors, (322), 195 states have internal predecessors, (322), 2 states have call successors, (3), 3 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 21:37:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:37:09,790 INFO L93 Difference]: Finished difference Result 651 states and 662 transitions. [2022-01-31 21:37:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-01-31 21:37:09,790 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.6428571428571428) internal successors, (322), 195 states have internal predecessors, (322), 2 states have call successors, (3), 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 326 [2022-01-31 21:37:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:37:09,791 INFO L225 Difference]: With dead ends: 651 [2022-01-31 21:37:09,791 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:37:09,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44151 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=34236, Invalid=116696, Unknown=0, NotChecked=0, Total=150932 [2022-01-31 21:37:09,797 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 511 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 30718 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 30718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:37:09,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 34 Invalid, 31429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 30718 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 21:37:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:37:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-01-31 21:37:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.0122324159021407) internal successors, (331), 327 states have internal predecessors, (331), 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 21:37:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 335 transitions. [2022-01-31 21:37:09,807 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 335 transitions. Word has length 326 [2022-01-31 21:37:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:37:09,807 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 335 transitions. [2022-01-31 21:37:09,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.6428571428571428) internal successors, (322), 195 states have internal predecessors, (322), 2 states have call successors, (3), 3 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 21:37:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 335 transitions. [2022-01-31 21:37:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 21:37:09,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:37:09,808 INFO L514 BasicCegarLoop]: trace histogram [125, 124, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:37:09,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 21:37:09,808 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:37:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:37:09,809 INFO L85 PathProgramCache]: Analyzing trace with hash -757611331, now seen corresponding path program 69 times [2022-01-31 21:37:09,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:37:09,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036664503] [2022-01-31 21:37:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:37:09,844 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:09,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:09,860 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:09,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:09,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:09,908 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:09,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:37:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:10,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:37:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:10,862 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 21:37:15,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:37:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036664503] [2022-01-31 21:37:15,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036664503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:37:15,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:37:15,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [199] imperfect sequences [] total 199 [2022-01-31 21:37:15,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676080656] [2022-01-31 21:37:15,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:37:15,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2022-01-31 21:37:15,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:37:15,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2022-01-31 21:37:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11755, Invalid=27647, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 21:37:15,156 INFO L87 Difference]: Start difference. First operand 332 states and 335 transitions. Second operand has 199 states, 199 states have (on average 1.64321608040201) internal successors, (327), 198 states have internal predecessors, (327), 2 states have call successors, (3), 3 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 21:37:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:37:33,619 INFO L93 Difference]: Finished difference Result 661 states and 672 transitions. [2022-01-31 21:37:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-01-31 21:37:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 199 states have (on average 1.64321608040201) internal successors, (327), 198 states have internal predecessors, (327), 2 states have call successors, (3), 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 331 [2022-01-31 21:37:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:37:33,621 INFO L225 Difference]: With dead ends: 661 [2022-01-31 21:37:33,621 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 21:37:33,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45524 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=35259, Invalid=120371, Unknown=0, NotChecked=0, Total=155630 [2022-01-31 21:37:33,628 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 646 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31728 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 32575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 31728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:37:33,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 44 Invalid, 32575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 31728 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-01-31 21:37:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 21:37:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2022-01-31 21:37:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0120481927710843) internal successors, (336), 332 states have internal predecessors, (336), 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 21:37:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 340 transitions. [2022-01-31 21:37:33,640 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 340 transitions. Word has length 331 [2022-01-31 21:37:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:37:33,640 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 340 transitions. [2022-01-31 21:37:33,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 199 states have (on average 1.64321608040201) internal successors, (327), 198 states have internal predecessors, (327), 2 states have call successors, (3), 3 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 21:37:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 340 transitions. [2022-01-31 21:37:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-01-31 21:37:33,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:37:33,641 INFO L514 BasicCegarLoop]: trace histogram [127, 126, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:37:33,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 21:37:33,641 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:37:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:37:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash 256195856, now seen corresponding path program 70 times [2022-01-31 21:37:33,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:37:33,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505177060] [2022-01-31 21:37:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:37:33,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:33,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:33,709 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:33,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:33,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:33,763 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:33,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:37:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:35,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:37:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:35,067 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 21:37:39,427 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:37:39,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505177060] [2022-01-31 21:37:39,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505177060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:37:39,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:37:39,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [202] imperfect sequences [] total 202 [2022-01-31 21:37:39,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769767037] [2022-01-31 21:37:39,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:37:39,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-01-31 21:37:39,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:37:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-01-31 21:37:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12384, Invalid=29436, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 21:37:39,431 INFO L87 Difference]: Start difference. First operand 337 states and 340 transitions. Second operand has 202 states, 202 states have (on average 1.6435643564356435) internal successors, (332), 201 states have internal predecessors, (332), 2 states have call successors, (3), 3 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 21:37:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:37:56,917 INFO L93 Difference]: Finished difference Result 921 states and 932 transitions. [2022-01-31 21:37:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-01-31 21:37:56,917 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 1.6435643564356435) internal successors, (332), 201 states have internal predecessors, (332), 2 states have call successors, (3), 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 336 [2022-01-31 21:37:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:37:56,918 INFO L225 Difference]: With dead ends: 921 [2022-01-31 21:37:56,918 INFO L226 Difference]: Without dead ends: 592 [2022-01-31 21:37:56,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48155 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=36585, Invalid=126227, Unknown=0, NotChecked=0, Total=162812 [2022-01-31 21:37:56,925 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 527 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 33064 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 33660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 33064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:37:56,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 74 Invalid, 33660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 33064 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-01-31 21:37:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-31 21:37:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2022-01-31 21:37:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 587 states have (on average 1.008517887563884) internal successors, (592), 587 states have internal predecessors, (592), 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 21:37:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 596 transitions. [2022-01-31 21:37:56,946 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 596 transitions. Word has length 336 [2022-01-31 21:37:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:37:56,946 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 596 transitions. [2022-01-31 21:37:56,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 1.6435643564356435) internal successors, (332), 201 states have internal predecessors, (332), 2 states have call successors, (3), 3 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 21:37:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 596 transitions. [2022-01-31 21:37:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 21:37:56,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:37:56,948 INFO L514 BasicCegarLoop]: trace histogram [128, 127, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:37:56,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 21:37:56,948 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:37:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:37:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash 347003246, now seen corresponding path program 71 times [2022-01-31 21:37:56,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:37:56,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341651868] [2022-01-31 21:37:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:37:56,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:56,992 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:56,992 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:57,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:57,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:57,034 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:57,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:37:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:58,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:37:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:58,607 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 21:38:03,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:38:03,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341651868] [2022-01-31 21:38:03,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [341651868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:38:03,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:38:03,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [204] imperfect sequences [] total 204 [2022-01-31 21:38:03,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505328013] [2022-01-31 21:38:03,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:38:03,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2022-01-31 21:38:03,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:38:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2022-01-31 21:38:03,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12377, Invalid=29035, Unknown=0, NotChecked=0, Total=41412 [2022-01-31 21:38:03,585 INFO L87 Difference]: Start difference. First operand 592 states and 596 transitions. Second operand has 204 states, 204 states have (on average 1.642156862745098) internal successors, (335), 203 states have internal predecessors, (335), 2 states have call successors, (3), 3 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 21:38:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:38:23,329 INFO L93 Difference]: Finished difference Result 929 states and 943 transitions. [2022-01-31 21:38:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-01-31 21:38:23,329 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 1.642156862745098) internal successors, (335), 203 states have internal predecessors, (335), 2 states have call successors, (3), 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 339 [2022-01-31 21:38:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:38:23,331 INFO L225 Difference]: With dead ends: 929 [2022-01-31 21:38:23,331 INFO L226 Difference]: Without dead ends: 599 [2022-01-31 21:38:23,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47918 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=37125, Invalid=126495, Unknown=0, NotChecked=0, Total=163620 [2022-01-31 21:38:23,336 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 531 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 33238 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 33238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:38:23,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 49 Invalid, 33845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 33238 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-01-31 21:38:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-31 21:38:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 345. [2022-01-31 21:38:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.011764705882353) internal successors, (344), 340 states have internal predecessors, (344), 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 21:38:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 348 transitions. [2022-01-31 21:38:23,348 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 348 transitions. Word has length 339 [2022-01-31 21:38:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:38:23,348 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 348 transitions. [2022-01-31 21:38:23,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 1.642156862745098) internal successors, (335), 203 states have internal predecessors, (335), 2 states have call successors, (3), 3 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 21:38:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 348 transitions. [2022-01-31 21:38:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-01-31 21:38:23,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:38:23,349 INFO L514 BasicCegarLoop]: trace histogram [130, 129, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:38:23,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 21:38:23,350 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:38:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:38:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash -926264193, now seen corresponding path program 72 times [2022-01-31 21:38:23,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:38:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898674244] [2022-01-31 21:38:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:38:23,395 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:23,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:23,418 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:38:23,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:23,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:23,466 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:38:23,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:38:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:38:25,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:38:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:38:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:38:30,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:38:30,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898674244] [2022-01-31 21:38:30,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [898674244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:38:30,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:38:30,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [207] imperfect sequences [] total 207 [2022-01-31 21:38:30,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385490854] [2022-01-31 21:38:30,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:38:30,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-01-31 21:38:30,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:38:30,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-01-31 21:38:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12732, Invalid=29910, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 21:38:30,493 INFO L87 Difference]: Start difference. First operand 345 states and 348 transitions. Second operand has 207 states, 207 states have (on average 1.642512077294686) internal successors, (340), 206 states have internal predecessors, (340), 2 states have call successors, (3), 3 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 21:38:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:38:49,484 INFO L93 Difference]: Finished difference Result 687 states and 698 transitions. [2022-01-31 21:38:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2022-01-31 21:38:49,485 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.642512077294686) internal successors, (340), 206 states have internal predecessors, (340), 2 states have call successors, (3), 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 344 [2022-01-31 21:38:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:38:49,486 INFO L225 Difference]: With dead ends: 687 [2022-01-31 21:38:49,486 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 21:38:49,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49348 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=38190, Invalid=130320, Unknown=0, NotChecked=0, Total=168510 [2022-01-31 21:38:49,493 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 803 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34208 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 34825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 34208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:38:49,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 44 Invalid, 34825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 34208 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-01-31 21:38:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 21:38:49,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2022-01-31 21:38:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.0115942028985507) internal successors, (349), 345 states have internal predecessors, (349), 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 21:38:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 353 transitions. [2022-01-31 21:38:49,527 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 353 transitions. Word has length 344 [2022-01-31 21:38:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:38:49,528 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 353 transitions. [2022-01-31 21:38:49,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.642512077294686) internal successors, (340), 206 states have internal predecessors, (340), 2 states have call successors, (3), 3 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 21:38:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 353 transitions. [2022-01-31 21:38:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-01-31 21:38:49,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:38:49,529 INFO L514 BasicCegarLoop]: trace histogram [132, 131, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:38:49,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 21:38:49,529 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:38:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:38:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash -867749830, now seen corresponding path program 73 times [2022-01-31 21:38:49,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:38:49,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204436637] [2022-01-31 21:38:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:38:49,556 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:49,567 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:49,567 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:38:49,582 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:49,608 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:49,609 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:38:49,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:38:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:38:50,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:38:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:38:50,670 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 21:38:55,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:38:55,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204436637] [2022-01-31 21:38:55,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1204436637] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:38:55,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:38:55,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [210] imperfect sequences [] total 210 [2022-01-31 21:38:55,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591436595] [2022-01-31 21:38:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:38:55,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 210 states [2022-01-31 21:38:55,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:38:55,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2022-01-31 21:38:55,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13092, Invalid=30798, Unknown=0, NotChecked=0, Total=43890 [2022-01-31 21:38:55,920 INFO L87 Difference]: Start difference. First operand 350 states and 353 transitions. Second operand has 210 states, 210 states have (on average 1.6428571428571428) internal successors, (345), 209 states have internal predecessors, (345), 2 states have call successors, (3), 3 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 21:39:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:39:14,574 INFO L93 Difference]: Finished difference Result 697 states and 708 transitions. [2022-01-31 21:39:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-01-31 21:39:14,575 INFO L78 Accepts]: Start accepts. Automaton has has 210 states, 210 states have (on average 1.6428571428571428) internal successors, (345), 209 states have internal predecessors, (345), 2 states have call successors, (3), 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 349 [2022-01-31 21:39:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:39:14,575 INFO L225 Difference]: With dead ends: 697 [2022-01-31 21:39:14,575 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 21:39:14,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 415 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50799 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=39270, Invalid=134202, Unknown=0, NotChecked=0, Total=173472 [2022-01-31 21:39:14,583 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 546 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 35257 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 35881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 35257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:39:14,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 54 Invalid, 35881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 35257 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-01-31 21:39:14,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 21:39:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2022-01-31 21:39:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.0114285714285713) internal successors, (354), 350 states have internal predecessors, (354), 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 21:39:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 358 transitions. [2022-01-31 21:39:14,594 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 358 transitions. Word has length 349 [2022-01-31 21:39:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:39:14,595 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 358 transitions. [2022-01-31 21:39:14,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 210 states, 210 states have (on average 1.6428571428571428) internal successors, (345), 209 states have internal predecessors, (345), 2 states have call successors, (3), 3 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 21:39:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 358 transitions. [2022-01-31 21:39:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-01-31 21:39:14,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:39:14,596 INFO L514 BasicCegarLoop]: trace histogram [134, 133, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:39:14,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 21:39:14,596 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:39:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:39:14,596 INFO L85 PathProgramCache]: Analyzing trace with hash -516496717, now seen corresponding path program 74 times [2022-01-31 21:39:14,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:39:14,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408545611] [2022-01-31 21:39:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:39:14,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:39:14,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:39:14,663 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:39:14,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:39:14,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:39:14,727 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:39:14,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:39:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:39:16,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:39:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:39:16,562 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 21:39:22,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:39:22,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408545611] [2022-01-31 21:39:22,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [408545611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:39:22,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:39:22,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [213] imperfect sequences [] total 213 [2022-01-31 21:39:22,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376999814] [2022-01-31 21:39:22,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:39:22,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-01-31 21:39:22,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:39:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-01-31 21:39:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13457, Invalid=31699, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 21:39:22,306 INFO L87 Difference]: Start difference. First operand 355 states and 358 transitions. Second operand has 213 states, 213 states have (on average 1.6431924882629108) internal successors, (350), 212 states have internal predecessors, (350), 2 states have call successors, (3), 3 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 21:39:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:39:43,730 INFO L93 Difference]: Finished difference Result 707 states and 718 transitions. [2022-01-31 21:39:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2022-01-31 21:39:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.6431924882629108) internal successors, (350), 212 states have internal predecessors, (350), 2 states have call successors, (3), 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 354 [2022-01-31 21:39:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:39:43,732 INFO L225 Difference]: With dead ends: 707 [2022-01-31 21:39:43,732 INFO L226 Difference]: Without dead ends: 360 [2022-01-31 21:39:43,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52271 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=40365, Invalid=138141, Unknown=0, NotChecked=0, Total=178506 [2022-01-31 21:39:43,738 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 554 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36496 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 36496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:39:43,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 54 Invalid, 37128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 36496 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-01-31 21:39:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-31 21:39:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-31 21:39:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.0112676056338028) internal successors, (359), 355 states have internal predecessors, (359), 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 21:39:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 363 transitions. [2022-01-31 21:39:43,750 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 363 transitions. Word has length 354 [2022-01-31 21:39:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:39:43,750 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 363 transitions. [2022-01-31 21:39:43,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.6431924882629108) internal successors, (350), 212 states have internal predecessors, (350), 2 states have call successors, (3), 3 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 21:39:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 363 transitions. [2022-01-31 21:39:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 21:39:43,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:39:43,751 INFO L514 BasicCegarLoop]: trace histogram [136, 135, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:39:43,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 21:39:43,751 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:39:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:39:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1871868666, now seen corresponding path program 75 times [2022-01-31 21:39:43,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:39:43,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622197810] [2022-01-31 21:39:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:39:43,780 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:39:43,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:39:43,792 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:39:43,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:39:43,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:39:43,843 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:39:43,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:39:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:39:44,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:39:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:39:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:39:51,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:39:51,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622197810] [2022-01-31 21:39:51,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [622197810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:39:51,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:39:51,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [216] imperfect sequences [] total 216 [2022-01-31 21:39:51,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937472095] [2022-01-31 21:39:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:39:51,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2022-01-31 21:39:51,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:39:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2022-01-31 21:39:51,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13827, Invalid=32613, Unknown=0, NotChecked=0, Total=46440 [2022-01-31 21:39:51,268 INFO L87 Difference]: Start difference. First operand 360 states and 363 transitions. Second operand has 216 states, 216 states have (on average 1.6435185185185186) internal successors, (355), 215 states have internal predecessors, (355), 2 states have call successors, (3), 3 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 21:40:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:40:12,848 INFO L93 Difference]: Finished difference Result 717 states and 728 transitions. [2022-01-31 21:40:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-01-31 21:40:12,848 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 216 states have (on average 1.6435185185185186) internal successors, (355), 215 states have internal predecessors, (355), 2 states have call successors, (3), 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 359 [2022-01-31 21:40:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:40:12,849 INFO L225 Difference]: With dead ends: 717 [2022-01-31 21:40:12,849 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 21:40:12,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 427 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53839 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=41475, Invalid=142137, Unknown=0, NotChecked=0, Total=183612 [2022-01-31 21:40:12,858 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 838 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 37485 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 38546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 37485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:40:12,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 49 Invalid, 38546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 37485 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-01-31 21:40:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 21:40:12,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-01-31 21:40:12,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.011111111111111) internal successors, (364), 360 states have internal predecessors, (364), 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 21:40:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 368 transitions. [2022-01-31 21:40:12,870 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 368 transitions. Word has length 359 [2022-01-31 21:40:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:40:12,870 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 368 transitions. [2022-01-31 21:40:12,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 216 states have (on average 1.6435185185185186) internal successors, (355), 215 states have internal predecessors, (355), 2 states have call successors, (3), 3 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 21:40:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 368 transitions. [2022-01-31 21:40:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-01-31 21:40:12,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:40:12,915 INFO L514 BasicCegarLoop]: trace histogram [138, 137, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:40:12,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 21:40:12,915 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:40:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:40:12,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1415432935, now seen corresponding path program 76 times [2022-01-31 21:40:12,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:40:12,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252466076] [2022-01-31 21:40:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:40:12,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:40:12,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:40:12,969 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:40:12,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:40:13,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:40:13,012 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:40:13,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:40:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:40:14,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:40:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:40:14,137 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 21:40:19,531 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:40:19,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252466076] [2022-01-31 21:40:19,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252466076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:40:19,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:40:19,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [219] imperfect sequences [] total 219 [2022-01-31 21:40:19,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982814838] [2022-01-31 21:40:19,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:40:19,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 219 states [2022-01-31 21:40:19,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:40:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2022-01-31 21:40:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14202, Invalid=33540, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 21:40:19,536 INFO L87 Difference]: Start difference. First operand 365 states and 368 transitions. Second operand has 219 states, 219 states have (on average 1.643835616438356) internal successors, (360), 218 states have internal predecessors, (360), 2 states have call successors, (3), 3 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 21:40:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:40:39,778 INFO L93 Difference]: Finished difference Result 727 states and 738 transitions. [2022-01-31 21:40:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-01-31 21:40:39,778 INFO L78 Accepts]: Start accepts. Automaton has has 219 states, 219 states have (on average 1.643835616438356) internal successors, (360), 218 states have internal predecessors, (360), 2 states have call successors, (3), 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 364 [2022-01-31 21:40:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:40:39,779 INFO L225 Difference]: With dead ends: 727 [2022-01-31 21:40:39,779 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 21:40:39,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55278 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=42600, Invalid=146190, Unknown=0, NotChecked=0, Total=188790 [2022-01-31 21:40:39,788 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 570 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 38679 mSolverCounterSat, 790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 39469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 38679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:40:39,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 54 Invalid, 39469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 38679 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-01-31 21:40:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 21:40:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2022-01-31 21:40:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.010958904109589) internal successors, (369), 365 states have internal predecessors, (369), 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 21:40:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 373 transitions. [2022-01-31 21:40:39,799 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 373 transitions. Word has length 364 [2022-01-31 21:40:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:40:39,799 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 373 transitions. [2022-01-31 21:40:39,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 219 states, 219 states have (on average 1.643835616438356) internal successors, (360), 218 states have internal predecessors, (360), 2 states have call successors, (3), 3 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 21:40:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 373 transitions. [2022-01-31 21:40:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-31 21:40:39,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:40:39,800 INFO L514 BasicCegarLoop]: trace histogram [140, 139, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:40:39,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 21:40:39,801 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:40:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:40:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash -547278894, now seen corresponding path program 77 times [2022-01-31 21:40:39,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:40:39,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453097389] [2022-01-31 21:40:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:40:39,850 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:40:39,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:40:39,862 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:40:39,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:40:39,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:40:39,904 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:40:39,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:40:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:40:41,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:40:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:40:41,079 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 21:40:46,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:40:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453097389] [2022-01-31 21:40:46,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [453097389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:40:46,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:40:46,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [222] imperfect sequences [] total 222 [2022-01-31 21:40:46,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068311624] [2022-01-31 21:40:46,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:40:46,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 222 states [2022-01-31 21:40:46,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:40:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2022-01-31 21:40:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14582, Invalid=34480, Unknown=0, NotChecked=0, Total=49062 [2022-01-31 21:40:46,460 INFO L87 Difference]: Start difference. First operand 370 states and 373 transitions. Second operand has 222 states, 222 states have (on average 1.6441441441441442) internal successors, (365), 221 states have internal predecessors, (365), 2 states have call successors, (3), 3 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 21:41:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:07,513 INFO L93 Difference]: Finished difference Result 737 states and 748 transitions. [2022-01-31 21:41:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-01-31 21:41:07,514 INFO L78 Accepts]: Start accepts. Automaton has has 222 states, 222 states have (on average 1.6441441441441442) internal successors, (365), 221 states have internal predecessors, (365), 2 states have call successors, (3), 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 369 [2022-01-31 21:41:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:07,515 INFO L225 Difference]: With dead ends: 737 [2022-01-31 21:41:07,515 INFO L226 Difference]: Without dead ends: 375 [2022-01-31 21:41:07,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 439 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56813 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=43740, Invalid=150300, Unknown=0, NotChecked=0, Total=194040 [2022-01-31 21:41:07,522 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 864 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39595 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 40397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 39595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:07,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 34 Invalid, 40397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 39595 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-01-31 21:41:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-01-31 21:41:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2022-01-31 21:41:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.0108108108108107) internal successors, (374), 370 states have internal predecessors, (374), 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 21:41:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 378 transitions. [2022-01-31 21:41:07,533 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 378 transitions. Word has length 369 [2022-01-31 21:41:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:07,533 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 378 transitions. [2022-01-31 21:41:07,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 222 states, 222 states have (on average 1.6441441441441442) internal successors, (365), 221 states have internal predecessors, (365), 2 states have call successors, (3), 3 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 21:41:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 378 transitions. [2022-01-31 21:41:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-01-31 21:41:07,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:07,535 INFO L514 BasicCegarLoop]: trace histogram [142, 141, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:07,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 21:41:07,535 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1591725339, now seen corresponding path program 78 times [2022-01-31 21:41:07,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:07,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820519994] [2022-01-31 21:41:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:07,570 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:41:07,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:41:07,584 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:41:07,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:41:07,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:41:07,617 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:41:07,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:09,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:09,621 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 21:41:15,279 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:15,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820519994] [2022-01-31 21:41:15,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [820519994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:15,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:15,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [225] imperfect sequences [] total 225 [2022-01-31 21:41:15,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076341647] [2022-01-31 21:41:15,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:15,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 225 states [2022-01-31 21:41:15,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:15,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2022-01-31 21:41:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14967, Invalid=35433, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 21:41:15,295 INFO L87 Difference]: Start difference. First operand 375 states and 378 transitions. Second operand has 225 states, 225 states have (on average 1.6444444444444444) internal successors, (370), 224 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)