/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/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:12:21,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:12:21,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:12:21,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:12:21,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:12:21,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:12:21,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:12:21,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:12:21,478 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:12:21,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:12:21,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:12:21,480 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:12:21,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:12:21,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:12:21,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:12:21,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:12:21,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:12:21,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:12:21,481 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:12:21,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:12:21,481 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:12:21,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:12:21,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:12:21,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:12:21,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:12:21,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:12:21,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:21,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:12:21,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:12:21,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:12:21,483 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:12:21,483 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:12:21,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:12:21,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:12:21,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:12:21,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:12:21,762 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:12:21,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-24 01:12:21,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0292ad0e8/9e32a561c5754520b36d6534c01ab9de/FLAG2358a343c [2022-02-24 01:12:22,156 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:12:22,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-24 01:12:22,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0292ad0e8/9e32a561c5754520b36d6534c01ab9de/FLAG2358a343c [2022-02-24 01:12:22,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0292ad0e8/9e32a561c5754520b36d6534c01ab9de [2022-02-24 01:12:22,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:12:22,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:12:22,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:22,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:12:22,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:12:22,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b84f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22, skipping insertion in model container [2022-02-24 01:12:22,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:12:22,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:12:22,287 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/insertion_sort-1.c[328,341] [2022-02-24 01:12:22,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:22,329 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:12:22,337 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/insertion_sort-1.c[328,341] [2022-02-24 01:12:22,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:22,359 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:12:22,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22 WrapperNode [2022-02-24 01:12:22,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:22,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:12:22,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:12:22,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:12:22,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:12:22,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:12:22,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:12:22,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:12:22,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:22,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:12:22,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 01:12:22,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 01:12:22,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:12:22,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:12:22,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:12:22,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:12:22,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:12:22,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:12:22,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:12:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:12:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:12:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:12:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 01:12:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:12:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:12:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 01:12:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:12:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:12:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:12:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:12:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:12:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:12:22,525 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:12:22,526 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:12:22,652 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:12:22,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:12:22,656 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-24 01:12:22,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:22 BoogieIcfgContainer [2022-02-24 01:12:22,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:12:22,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:12:22,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:12:22,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:12:22,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:12:22" (1/3) ... [2022-02-24 01:12:22,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16779249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:22, skipping insertion in model container [2022-02-24 01:12:22,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (2/3) ... [2022-02-24 01:12:22,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16779249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:22, skipping insertion in model container [2022-02-24 01:12:22,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:22" (3/3) ... [2022-02-24 01:12:22,666 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2022-02-24 01:12:22,670 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:12:22,670 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:12:22,728 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:12:22,733 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-24 01:12:22,733 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:12:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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) [2022-02-24 01:12:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 01:12:22,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:22,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:22,762 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1898607287, now seen corresponding path program 1 times [2022-02-24 01:12:22,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:22,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554969643] [2022-02-24 01:12:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:22,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:22,812 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:22,951 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:22,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554969643] [2022-02-24 01:12:22,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [554969643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:22,952 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:22,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:12:22,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988759984] [2022-02-24 01:12:22,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:22,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:12:22,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:22,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:12:22,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:12:22,979 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:23,083 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2022-02-24 01:12:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:12:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-02-24 01:12:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:23,088 INFO L225 Difference]: With dead ends: 67 [2022-02-24 01:12:23,089 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 01:12:23,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:23,094 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:23,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:23,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 01:12:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-24 01:12:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-02-24 01:12:23,118 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-02-24 01:12:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:23,118 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-02-24 01:12:23,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-02-24 01:12:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 01:12:23,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:23,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:23,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:12:23,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:23,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1409532089, now seen corresponding path program 1 times [2022-02-24 01:12:23,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:23,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362031268] [2022-02-24 01:12:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:23,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:23,148 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:23,148 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:23,148 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:23,315 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:23,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362031268] [2022-02-24 01:12:23,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1362031268] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:23,316 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:23,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:12:23,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516016961] [2022-02-24 01:12:23,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:23,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:12:23,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:12:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:12:23,318 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:23,531 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-02-24 01:12:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:12:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 01:12:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:23,532 INFO L225 Difference]: With dead ends: 63 [2022-02-24 01:12:23,532 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 01:12:23,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:23,534 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:23,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 48 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 01:12:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-02-24 01:12:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-02-24 01:12:23,542 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2022-02-24 01:12:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:23,542 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-02-24 01:12:23,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-02-24 01:12:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:12:23,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:23,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:23,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:12:23,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:23,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1068097608, now seen corresponding path program 1 times [2022-02-24 01:12:23,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:23,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724462969] [2022-02-24 01:12:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:23,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:23,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:23,583 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:23,583 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:24,078 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:24,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724462969] [2022-02-24 01:12:24,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [724462969] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:24,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:24,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:12:24,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402133277] [2022-02-24 01:12:24,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:24,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:12:24,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:12:24,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:24,084 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:24,481 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-02-24 01:12:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:12:24,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 01:12:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:24,485 INFO L225 Difference]: With dead ends: 83 [2022-02-24 01:12:24,485 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 01:12:24,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:12:24,491 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:24,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 01:12:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2022-02-24 01:12:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-02-24 01:12:24,517 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2022-02-24 01:12:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:24,518 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-02-24 01:12:24,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-02-24 01:12:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:12:24,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:24,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:12:24,519 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,520 INFO L85 PathProgramCache]: Analyzing trace with hash -367033030, now seen corresponding path program 1 times [2022-02-24 01:12:24,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897246492] [2022-02-24 01:12:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:24,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:24,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:24,525 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:24,525 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:24,606 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:24,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897246492] [2022-02-24 01:12:24,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897246492] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:24,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:24,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:12:24,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035890519] [2022-02-24 01:12:24,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:24,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:12:24,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:12:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:12:24,608 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:24,711 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-02-24 01:12:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:12:24,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 01:12:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:24,714 INFO L225 Difference]: With dead ends: 92 [2022-02-24 01:12:24,714 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 01:12:24,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:24,722 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:24,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 37 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 01:12:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-02-24 01:12:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-02-24 01:12:24,738 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2022-02-24 01:12:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:24,739 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-02-24 01:12:24,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-02-24 01:12:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:12:24,740 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:24,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:12:24,741 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1586594931, now seen corresponding path program 1 times [2022-02-24 01:12:24,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777617367] [2022-02-24 01:12:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:24,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:24,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:24,745 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:24,745 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:25,190 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:25,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777617367] [2022-02-24 01:12:25,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777617367] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:25,191 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:25,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:12:25,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61481753] [2022-02-24 01:12:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:25,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:12:25,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:12:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:12:25,193 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:25,822 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2022-02-24 01:12:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:12:25,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:12:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:25,824 INFO L225 Difference]: With dead ends: 126 [2022-02-24 01:12:25,824 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 01:12:25,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:12:25,825 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:25,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 70 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:25,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 01:12:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 56. [2022-02-24 01:12:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 49 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-02-24 01:12:25,836 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 30 [2022-02-24 01:12:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:25,836 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-02-24 01:12:25,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-02-24 01:12:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:12:25,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:25,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:25,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:12:25,837 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash 932991851, now seen corresponding path program 2 times [2022-02-24 01:12:25,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:25,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694300305] [2022-02-24 01:12:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:25,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:25,841 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:25,841 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:25,930 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:25,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694300305] [2022-02-24 01:12:25,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694300305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:25,930 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:25,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:25,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919717157] [2022-02-24 01:12:25,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:25,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:25,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:25,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:25,931 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:26,116 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2022-02-24 01:12:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:12:26,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 01:12:26,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:26,117 INFO L225 Difference]: With dead ends: 147 [2022-02-24 01:12:26,118 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 01:12:26,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:12:26,118 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:26,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 42 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 01:12:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2022-02-24 01:12:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-02-24 01:12:26,133 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 31 [2022-02-24 01:12:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:26,134 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-02-24 01:12:26,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-02-24 01:12:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:12:26,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:26,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:26,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:12:26,135 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash 912710034, now seen corresponding path program 1 times [2022-02-24 01:12:26,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:26,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791490555] [2022-02-24 01:12:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:26,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:26,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:26,138 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:26,138 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:12:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:26,250 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:26,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791490555] [2022-02-24 01:12:26,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [791490555] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:26,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:26,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:26,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864576021] [2022-02-24 01:12:26,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:26,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:26,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:26,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:26,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:26,252 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:26,472 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2022-02-24 01:12:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:12:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-24 01:12:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:26,475 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:12:26,475 INFO L226 Difference]: Without dead ends: 87 [2022-02-24 01:12:26,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:26,476 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:26,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 64 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-24 01:12:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2022-02-24 01:12:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 59 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-02-24 01:12:26,494 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 33 [2022-02-24 01:12:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:26,494 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-02-24 01:12:26,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-02-24 01:12:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:12:26,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:26,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:26,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:12:26,495 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1010087575, now seen corresponding path program 3 times [2022-02-24 01:12:26,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:26,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552718356] [2022-02-24 01:12:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:26,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:26,500 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:26,500 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:26,501 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:26,891 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:26,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552718356] [2022-02-24 01:12:26,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [552718356] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:26,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:26,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:12:26,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519987840] [2022-02-24 01:12:26,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:26,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:12:26,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:26,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:12:26,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:26,892 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:27,402 INFO L93 Difference]: Finished difference Result 174 states and 215 transitions. [2022-02-24 01:12:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:12:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 01:12:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:27,404 INFO L225 Difference]: With dead ends: 174 [2022-02-24 01:12:27,404 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:12:27,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:12:27,405 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 161 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:27,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 63 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:12:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 74. [2022-02-24 01:12:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-02-24 01:12:27,428 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 33 [2022-02-24 01:12:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:27,428 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-02-24 01:12:27,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-02-24 01:12:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:12:27,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:27,434 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:27,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:12:27,434 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:27,434 INFO L85 PathProgramCache]: Analyzing trace with hash 925785056, now seen corresponding path program 1 times [2022-02-24 01:12:27,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:27,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052154919] [2022-02-24 01:12:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:27,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:27,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:27,438 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:27,438 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:27,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:27,708 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:27,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052154919] [2022-02-24 01:12:27,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052154919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:27,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:27,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:12:27,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024692988] [2022-02-24 01:12:27,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:27,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:12:27,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:27,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:12:27,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:12:27,709 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:28,516 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2022-02-24 01:12:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:12:28,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:12:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:28,517 INFO L225 Difference]: With dead ends: 197 [2022-02-24 01:12:28,517 INFO L226 Difference]: Without dead ends: 157 [2022-02-24 01:12:28,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=555, Invalid=1995, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:12:28,519 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:28,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 71 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-24 01:12:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 80. [2022-02-24 01:12:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 73 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2022-02-24 01:12:28,540 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 38 [2022-02-24 01:12:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:28,541 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2022-02-24 01:12:28,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2022-02-24 01:12:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:12:28,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:28,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:28,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:12:28,542 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:28,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1626849634, now seen corresponding path program 2 times [2022-02-24 01:12:28,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:28,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954380649] [2022-02-24 01:12:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:28,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:28,545 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:28,545 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:28,545 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:28,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:28,605 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:28,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954380649] [2022-02-24 01:12:28,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [954380649] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:28,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:28,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:28,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712344558] [2022-02-24 01:12:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:28,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:28,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:28,606 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:28,788 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2022-02-24 01:12:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:12:28,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:12:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:28,789 INFO L225 Difference]: With dead ends: 165 [2022-02-24 01:12:28,789 INFO L226 Difference]: Without dead ends: 119 [2022-02-24 01:12:28,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:28,790 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:28,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 48 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-24 01:12:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 88. [2022-02-24 01:12:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.2) internal successors, (96), 81 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:28,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2022-02-24 01:12:28,809 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 38 [2022-02-24 01:12:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:28,809 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2022-02-24 01:12:28,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2022-02-24 01:12:28,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:12:28,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:28,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:28,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:12:28,810 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash 909842600, now seen corresponding path program 3 times [2022-02-24 01:12:28,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:28,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509851172] [2022-02-24 01:12:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:28,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:28,813 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:28,813 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:29,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:29,235 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:29,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509851172] [2022-02-24 01:12:29,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [509851172] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:29,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:29,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:12:29,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726433828] [2022-02-24 01:12:29,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:29,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:12:29,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:12:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:12:29,236 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:30,105 INFO L93 Difference]: Finished difference Result 245 states and 298 transitions. [2022-02-24 01:12:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:12:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:12:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:30,106 INFO L225 Difference]: With dead ends: 245 [2022-02-24 01:12:30,106 INFO L226 Difference]: Without dead ends: 193 [2022-02-24 01:12:30,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 01:12:30,108 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 173 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:30,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 94 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-24 01:12:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 125. [2022-02-24 01:12:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 118 states have internal predecessors, (146), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 153 transitions. [2022-02-24 01:12:30,135 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 153 transitions. Word has length 38 [2022-02-24 01:12:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:30,135 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 153 transitions. [2022-02-24 01:12:30,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 153 transitions. [2022-02-24 01:12:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:12:30,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:30,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:30,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:12:30,136 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2114079652, now seen corresponding path program 4 times [2022-02-24 01:12:30,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:30,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820580068] [2022-02-24 01:12:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:30,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:30,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:30,139 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:30,139 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:30,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:30,234 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:30,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820580068] [2022-02-24 01:12:30,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820580068] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:30,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:30,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:12:30,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619654897] [2022-02-24 01:12:30,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:30,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:30,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:30,235 INFO L87 Difference]: Start difference. First operand 125 states and 153 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:30,610 INFO L93 Difference]: Finished difference Result 328 states and 407 transitions. [2022-02-24 01:12:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:12:30,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 01:12:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:30,612 INFO L225 Difference]: With dead ends: 328 [2022-02-24 01:12:30,612 INFO L226 Difference]: Without dead ends: 239 [2022-02-24 01:12:30,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:30,613 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 180 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:30,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 78 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-24 01:12:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 159. [2022-02-24 01:12:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 152 states have internal predecessors, (185), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 192 transitions. [2022-02-24 01:12:30,668 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 192 transitions. Word has length 39 [2022-02-24 01:12:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:30,668 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 192 transitions. [2022-02-24 01:12:30,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 192 transitions. [2022-02-24 01:12:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 01:12:30,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:30,669 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:30,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:12:30,669 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1844691523, now seen corresponding path program 2 times [2022-02-24 01:12:30,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:30,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780544181] [2022-02-24 01:12:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:30,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:30,671 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:30,671 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:30,672 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:30,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:12:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:30,921 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:30,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780544181] [2022-02-24 01:12:30,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780544181] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:30,921 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:30,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:12:30,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578628330] [2022-02-24 01:12:30,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:30,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:12:30,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:30,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:12:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:30,922 INFO L87 Difference]: Start difference. First operand 159 states and 192 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:31,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:31,430 INFO L93 Difference]: Finished difference Result 222 states and 268 transitions. [2022-02-24 01:12:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:12:31,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-02-24 01:12:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:31,431 INFO L225 Difference]: With dead ends: 222 [2022-02-24 01:12:31,431 INFO L226 Difference]: Without dead ends: 220 [2022-02-24 01:12:31,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:12:31,432 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 133 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:31,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 79 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-24 01:12:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 179. [2022-02-24 01:12:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 168 states have (on average 1.2142857142857142) internal successors, (204), 170 states have internal predecessors, (204), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2022-02-24 01:12:31,477 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 41 [2022-02-24 01:12:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:31,477 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2022-02-24 01:12:31,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2022-02-24 01:12:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 01:12:31,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:31,479 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:31,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:12:31,479 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:31,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:31,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1706177446, now seen corresponding path program 5 times [2022-02-24 01:12:31,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:31,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023711707] [2022-02-24 01:12:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:31,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:31,481 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:31,481 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:31,481 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:31,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:31,876 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:31,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023711707] [2022-02-24 01:12:31,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023711707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:31,876 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:31,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:12:31,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800750453] [2022-02-24 01:12:31,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:31,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:12:31,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:31,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:12:31,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:12:31,877 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:32,532 INFO L93 Difference]: Finished difference Result 302 states and 363 transitions. [2022-02-24 01:12:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:12:32,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 01:12:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:32,534 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:12:32,534 INFO L226 Difference]: Without dead ends: 213 [2022-02-24 01:12:32,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:12:32,535 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:32,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 71 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-24 01:12:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 161. [2022-02-24 01:12:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 151 states have internal predecessors, (173), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2022-02-24 01:12:32,580 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 41 [2022-02-24 01:12:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:32,580 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2022-02-24 01:12:32,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2022-02-24 01:12:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 01:12:32,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:32,580 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:32,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:12:32,581 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash 364945739, now seen corresponding path program 4 times [2022-02-24 01:12:32,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:32,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287924380] [2022-02-24 01:12:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:32,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:32,583 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:32,583 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:32,583 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:32,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:32,902 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:32,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287924380] [2022-02-24 01:12:32,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287924380] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:32,902 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:32,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:12:32,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477525393] [2022-02-24 01:12:32,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:32,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:12:32,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:32,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:12:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:12:32,903 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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) [2022-02-24 01:12:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:33,925 INFO L93 Difference]: Finished difference Result 281 states and 332 transitions. [2022-02-24 01:12:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:12:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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 [2022-02-24 01:12:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:33,926 INFO L225 Difference]: With dead ends: 281 [2022-02-24 01:12:33,926 INFO L226 Difference]: Without dead ends: 227 [2022-02-24 01:12:33,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=614, Invalid=2692, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 01:12:33,928 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 181 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:33,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 95 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-24 01:12:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 168. [2022-02-24 01:12:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 155 states have (on average 1.1612903225806452) internal successors, (180), 158 states have internal predecessors, (180), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2022-02-24 01:12:33,975 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 43 [2022-02-24 01:12:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:33,975 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2022-02-24 01:12:33,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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) [2022-02-24 01:12:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2022-02-24 01:12:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:12:33,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:33,976 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:33,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:12:33,976 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1980469830, now seen corresponding path program 1 times [2022-02-24 01:12:33,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:33,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786011945] [2022-02-24 01:12:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:33,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:33,978 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:33,978 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:33,978 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:34,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:34,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:12:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:34,163 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:34,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786011945] [2022-02-24 01:12:34,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [786011945] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:34,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:34,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:12:34,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652315437] [2022-02-24 01:12:34,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:34,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:12:34,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:34,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:12:34,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:12:34,165 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:34,759 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2022-02-24 01:12:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:12:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-24 01:12:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:34,760 INFO L225 Difference]: With dead ends: 217 [2022-02-24 01:12:34,760 INFO L226 Difference]: Without dead ends: 215 [2022-02-24 01:12:34,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:12:34,761 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:34,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 105 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-02-24 01:12:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 172. [2022-02-24 01:12:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 159 states have (on average 1.169811320754717) internal successors, (186), 162 states have internal predecessors, (186), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 199 transitions. [2022-02-24 01:12:34,816 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 199 transitions. Word has length 46 [2022-02-24 01:12:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:34,817 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 199 transitions. [2022-02-24 01:12:34,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 199 transitions. [2022-02-24 01:12:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:12:34,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:34,818 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:34,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:12:34,818 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:34,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1458084557, now seen corresponding path program 1 times [2022-02-24 01:12:34,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:34,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407842649] [2022-02-24 01:12:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:34,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:34,820 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:34,820 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:34,821 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:35,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:35,315 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:35,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407842649] [2022-02-24 01:12:35,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [407842649] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:35,316 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:35,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:12:35,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562204599] [2022-02-24 01:12:35,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:35,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:12:35,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:35,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:12:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:35,317 INFO L87 Difference]: Start difference. First operand 172 states and 199 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:35,874 INFO L93 Difference]: Finished difference Result 234 states and 272 transitions. [2022-02-24 01:12:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:12:35,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:12:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:35,876 INFO L225 Difference]: With dead ends: 234 [2022-02-24 01:12:35,876 INFO L226 Difference]: Without dead ends: 232 [2022-02-24 01:12:35,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:12:35,877 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:35,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 61 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-24 01:12:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 178. [2022-02-24 01:12:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 168 states have internal predecessors, (195), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 208 transitions. [2022-02-24 01:12:35,955 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 208 transitions. Word has length 46 [2022-02-24 01:12:35,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:35,956 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 208 transitions. [2022-02-24 01:12:35,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 208 transitions. [2022-02-24 01:12:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:12:35,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:35,956 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:35,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:12:35,957 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:35,957 INFO L85 PathProgramCache]: Analyzing trace with hash -253360043, now seen corresponding path program 2 times [2022-02-24 01:12:35,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:35,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167206852] [2022-02-24 01:12:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:35,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:35,966 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:35,966 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:36,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:36,505 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:36,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167206852] [2022-02-24 01:12:36,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167206852] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:36,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:36,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:12:36,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290068184] [2022-02-24 01:12:36,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:36,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:12:36,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:12:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:12:36,506 INFO L87 Difference]: Start difference. First operand 178 states and 208 transitions. Second operand has 25 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:37,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:37,902 INFO L93 Difference]: Finished difference Result 271 states and 319 transitions. [2022-02-24 01:12:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:12:37,902 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:12:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:37,903 INFO L225 Difference]: With dead ends: 271 [2022-02-24 01:12:37,904 INFO L226 Difference]: Without dead ends: 269 [2022-02-24 01:12:37,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=2799, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:12:37,905 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 193 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:37,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 111 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:37,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-24 01:12:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 184. [2022-02-24 01:12:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 174 states have internal predecessors, (203), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 216 transitions. [2022-02-24 01:12:37,961 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 216 transitions. Word has length 46 [2022-02-24 01:12:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:37,962 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 216 transitions. [2022-02-24 01:12:37,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 216 transitions. [2022-02-24 01:12:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 01:12:37,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:37,962 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:37,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:12:37,963 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:37,963 INFO L85 PathProgramCache]: Analyzing trace with hash -966082275, now seen corresponding path program 3 times [2022-02-24 01:12:37,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:37,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259065750] [2022-02-24 01:12:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:37,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:37,965 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:37,965 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:38,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:38,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:12:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:38,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:12:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:38,063 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:38,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259065750] [2022-02-24 01:12:38,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259065750] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:38,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:38,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:12:38,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195708759] [2022-02-24 01:12:38,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:38,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:38,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:38,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:38,064 INFO L87 Difference]: Start difference. First operand 184 states and 216 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:38,399 INFO L93 Difference]: Finished difference Result 264 states and 312 transitions. [2022-02-24 01:12:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:12:38,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-02-24 01:12:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:38,400 INFO L225 Difference]: With dead ends: 264 [2022-02-24 01:12:38,400 INFO L226 Difference]: Without dead ends: 231 [2022-02-24 01:12:38,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:38,401 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 173 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:38,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 61 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-24 01:12:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 175. [2022-02-24 01:12:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.165644171779141) internal successors, (190), 166 states have internal predecessors, (190), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2022-02-24 01:12:38,476 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 49 [2022-02-24 01:12:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:38,476 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2022-02-24 01:12:38,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2022-02-24 01:12:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 01:12:38,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:38,477 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:38,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:12:38,477 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:38,477 INFO L85 PathProgramCache]: Analyzing trace with hash -146750412, now seen corresponding path program 4 times [2022-02-24 01:12:38,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:38,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378548350] [2022-02-24 01:12:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:38,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:38,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:38,479 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:38,479 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:38,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:38,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:12:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:38,683 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:38,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378548350] [2022-02-24 01:12:38,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1378548350] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:38,683 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:38,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:12:38,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314635358] [2022-02-24 01:12:38,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:38,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:12:38,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:38,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:12:38,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:12:38,684 INFO L87 Difference]: Start difference. First operand 175 states and 202 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:39,350 INFO L93 Difference]: Finished difference Result 223 states and 262 transitions. [2022-02-24 01:12:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:12:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-24 01:12:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:39,352 INFO L225 Difference]: With dead ends: 223 [2022-02-24 01:12:39,352 INFO L226 Difference]: Without dead ends: 221 [2022-02-24 01:12:39,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:12:39,353 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 143 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:39,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 86 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-24 01:12:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 195. [2022-02-24 01:12:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 184 states have internal predecessors, (208), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 01:12:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 226 transitions. [2022-02-24 01:12:39,418 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 226 transitions. Word has length 49 [2022-02-24 01:12:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:39,418 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 226 transitions. [2022-02-24 01:12:39,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 226 transitions. [2022-02-24 01:12:39,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:12:39,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:39,419 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:39,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:12:39,419 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash 554440741, now seen corresponding path program 1 times [2022-02-24 01:12:39,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:39,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715045334] [2022-02-24 01:12:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:39,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:39,436 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:39,436 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:39,436 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:40,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:40,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:12:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:40,102 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:40,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715045334] [2022-02-24 01:12:40,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [715045334] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:40,102 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:40,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:12:40,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656485378] [2022-02-24 01:12:40,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:40,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:12:40,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:40,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:12:40,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:12:40,104 INFO L87 Difference]: Start difference. First operand 195 states and 226 transitions. Second operand has 28 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:41,784 INFO L93 Difference]: Finished difference Result 262 states and 301 transitions. [2022-02-24 01:12:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:12:41,785 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-02-24 01:12:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:41,786 INFO L225 Difference]: With dead ends: 262 [2022-02-24 01:12:41,786 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:12:41,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=526, Invalid=3380, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:12:41,787 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 142 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:41,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 97 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:12:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:12:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2022-02-24 01:12:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 192 states have (on average 1.1510416666666667) internal successors, (221), 197 states have internal predecessors, (221), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 01:12:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 239 transitions. [2022-02-24 01:12:41,856 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 239 transitions. Word has length 51 [2022-02-24 01:12:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:41,856 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 239 transitions. [2022-02-24 01:12:41,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 239 transitions. [2022-02-24 01:12:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:12:41,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:41,857 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:41,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:12:41,857 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash 455716478, now seen corresponding path program 1 times [2022-02-24 01:12:41,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:41,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528256704] [2022-02-24 01:12:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:41,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:41,859 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:41,860 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:41,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:41,891 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:41,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528256704] [2022-02-24 01:12:41,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1528256704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:41,892 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:41,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:12:41,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613243916] [2022-02-24 01:12:41,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:41,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:12:41,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:12:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:12:41,892 INFO L87 Difference]: Start difference. First operand 208 states and 239 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:42,064 INFO L93 Difference]: Finished difference Result 296 states and 346 transitions. [2022-02-24 01:12:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:12:42,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 01:12:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:42,065 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:12:42,065 INFO L226 Difference]: Without dead ends: 234 [2022-02-24 01:12:42,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:12:42,066 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:42,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 59 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-24 01:12:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2022-02-24 01:12:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 180 states have (on average 1.1333333333333333) internal successors, (204), 185 states have internal predecessors, (204), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 01:12:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 222 transitions. [2022-02-24 01:12:42,142 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 222 transitions. Word has length 51 [2022-02-24 01:12:42,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:42,142 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 222 transitions. [2022-02-24 01:12:42,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 222 transitions. [2022-02-24 01:12:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:12:42,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:42,143 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:42,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:12:42,143 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1181899854, now seen corresponding path program 1 times [2022-02-24 01:12:42,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:42,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463214106] [2022-02-24 01:12:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:42,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:42,145 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:42,145 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:42,145 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:42,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:42,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:42,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463214106] [2022-02-24 01:12:42,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [463214106] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:42,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:42,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:12:42,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794862247] [2022-02-24 01:12:42,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:42,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:12:42,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:42,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:12:42,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:42,523 INFO L87 Difference]: Start difference. First operand 196 states and 222 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:43,564 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2022-02-24 01:12:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:12:43,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 51 [2022-02-24 01:12:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:43,565 INFO L225 Difference]: With dead ends: 259 [2022-02-24 01:12:43,566 INFO L226 Difference]: Without dead ends: 257 [2022-02-24 01:12:43,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=366, Invalid=1986, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:12:43,567 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 134 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:43,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 85 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-24 01:12:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 225. [2022-02-24 01:12:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 209 states have (on average 1.1626794258373205) internal successors, (243), 214 states have internal predecessors, (243), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 01:12:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 261 transitions. [2022-02-24 01:12:43,660 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 261 transitions. Word has length 51 [2022-02-24 01:12:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:43,660 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 261 transitions. [2022-02-24 01:12:43,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 261 transitions. [2022-02-24 01:12:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:12:43,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:43,661 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:43,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:12:43,661 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash -186725060, now seen corresponding path program 5 times [2022-02-24 01:12:43,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:43,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021960824] [2022-02-24 01:12:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:43,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:43,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:43,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:43,664 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:44,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:44,196 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:44,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021960824] [2022-02-24 01:12:44,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2021960824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:44,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:44,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:12:44,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691411541] [2022-02-24 01:12:44,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:44,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:12:44,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:44,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:12:44,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:12:44,197 INFO L87 Difference]: Start difference. First operand 225 states and 261 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:45,498 INFO L93 Difference]: Finished difference Result 360 states and 420 transitions. [2022-02-24 01:12:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:12:45,498 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 01:12:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:45,499 INFO L225 Difference]: With dead ends: 360 [2022-02-24 01:12:45,499 INFO L226 Difference]: Without dead ends: 306 [2022-02-24 01:12:45,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=2868, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 01:12:45,500 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 197 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:45,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 101 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:45,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-02-24 01:12:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 223. [2022-02-24 01:12:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 209 states have (on average 1.167464114832536) internal successors, (244), 212 states have internal predecessors, (244), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 258 transitions. [2022-02-24 01:12:45,582 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 258 transitions. Word has length 51 [2022-02-24 01:12:45,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:45,582 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 258 transitions. [2022-02-24 01:12:45,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 258 transitions. [2022-02-24 01:12:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:12:45,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:45,583 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:45,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:12:45,583 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1824744982, now seen corresponding path program 2 times [2022-02-24 01:12:45,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:45,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535829059] [2022-02-24 01:12:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:45,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:45,586 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:45,586 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:46,053 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:46,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535829059] [2022-02-24 01:12:46,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1535829059] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:46,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:46,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:12:46,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714391986] [2022-02-24 01:12:46,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:46,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:12:46,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:46,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:12:46,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:12:46,055 INFO L87 Difference]: Start difference. First operand 223 states and 258 transitions. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:47,135 INFO L93 Difference]: Finished difference Result 326 states and 384 transitions. [2022-02-24 01:12:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:12:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 01:12:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:47,136 INFO L225 Difference]: With dead ends: 326 [2022-02-24 01:12:47,136 INFO L226 Difference]: Without dead ends: 282 [2022-02-24 01:12:47,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=2553, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 01:12:47,137 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 133 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:47,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 69 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-24 01:12:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2022-02-24 01:12:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.1743119266055047) internal successors, (256), 221 states have internal predecessors, (256), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 270 transitions. [2022-02-24 01:12:47,223 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 270 transitions. Word has length 51 [2022-02-24 01:12:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:47,224 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 270 transitions. [2022-02-24 01:12:47,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 270 transitions. [2022-02-24 01:12:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:12:47,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:47,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:47,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:12:47,225 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 417331817, now seen corresponding path program 2 times [2022-02-24 01:12:47,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:47,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932692121] [2022-02-24 01:12:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:47,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:47,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:47,228 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:47,228 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:47,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:47,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 01:12:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:47,266 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:47,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932692121] [2022-02-24 01:12:47,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [932692121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:47,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:47,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:12:47,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022158140] [2022-02-24 01:12:47,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:47,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:12:47,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:12:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:12:47,267 INFO L87 Difference]: Start difference. First operand 232 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:47,468 INFO L93 Difference]: Finished difference Result 309 states and 367 transitions. [2022-02-24 01:12:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:12:47,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-02-24 01:12:47,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:47,470 INFO L225 Difference]: With dead ends: 309 [2022-02-24 01:12:47,470 INFO L226 Difference]: Without dead ends: 265 [2022-02-24 01:12:47,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:47,470 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 82 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:47,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 62 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-24 01:12:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 241. [2022-02-24 01:12:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 227 states have (on average 1.171806167400881) internal successors, (266), 230 states have internal predecessors, (266), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 280 transitions. [2022-02-24 01:12:47,600 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 280 transitions. Word has length 54 [2022-02-24 01:12:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:47,600 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 280 transitions. [2022-02-24 01:12:47,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 280 transitions. [2022-02-24 01:12:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:12:47,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:47,602 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:47,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:12:47,602 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:47,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 636186535, now seen corresponding path program 1 times [2022-02-24 01:12:47,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:47,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617856358] [2022-02-24 01:12:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:47,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:47,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:47,606 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:47,606 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:47,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:47,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 01:12:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:47,803 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:47,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617856358] [2022-02-24 01:12:47,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [617856358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:47,803 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:47,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:12:47,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331538393] [2022-02-24 01:12:47,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:47,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:12:47,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:12:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:47,805 INFO L87 Difference]: Start difference. First operand 241 states and 280 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:48,751 INFO L93 Difference]: Finished difference Result 452 states and 542 transitions. [2022-02-24 01:12:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:12:48,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-02-24 01:12:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:48,753 INFO L225 Difference]: With dead ends: 452 [2022-02-24 01:12:48,753 INFO L226 Difference]: Without dead ends: 361 [2022-02-24 01:12:48,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=403, Invalid=2047, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 01:12:48,754 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 185 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:48,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 95 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-24 01:12:48,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 282. [2022-02-24 01:12:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 269 states have internal predecessors, (310), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 01:12:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 330 transitions. [2022-02-24 01:12:48,911 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 330 transitions. Word has length 54 [2022-02-24 01:12:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:48,911 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 330 transitions. [2022-02-24 01:12:48,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 330 transitions. [2022-02-24 01:12:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:12:48,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:48,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:48,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:12:48,912 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1518785839, now seen corresponding path program 3 times [2022-02-24 01:12:48,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:48,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880477161] [2022-02-24 01:12:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:48,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:48,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:48,926 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:48,926 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:49,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:49,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 01:12:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:49,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:49,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880477161] [2022-02-24 01:12:49,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [880477161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:49,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:49,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:12:49,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303013860] [2022-02-24 01:12:49,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:49,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:12:49,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:12:49,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:12:49,341 INFO L87 Difference]: Start difference. First operand 282 states and 330 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:50,384 INFO L93 Difference]: Finished difference Result 316 states and 370 transitions. [2022-02-24 01:12:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:12:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-02-24 01:12:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:50,386 INFO L225 Difference]: With dead ends: 316 [2022-02-24 01:12:50,386 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 01:12:50,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=2210, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:12:50,387 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 170 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:50,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 94 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 01:12:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 288. [2022-02-24 01:12:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 269 states have (on average 1.174721189591078) internal successors, (316), 275 states have internal predecessors, (316), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 01:12:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 338 transitions. [2022-02-24 01:12:50,504 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 338 transitions. Word has length 54 [2022-02-24 01:12:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:50,504 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 338 transitions. [2022-02-24 01:12:50,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 338 transitions. [2022-02-24 01:12:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:12:50,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:50,505 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:50,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:12:50,506 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash -676055644, now seen corresponding path program 2 times [2022-02-24 01:12:50,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:50,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292973245] [2022-02-24 01:12:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:50,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:50,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:50,509 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:50,509 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:51,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:51,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 01:12:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:51,143 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:51,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292973245] [2022-02-24 01:12:51,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292973245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:51,143 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:51,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:12:51,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275069020] [2022-02-24 01:12:51,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:51,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:12:51,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:12:51,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:12:51,144 INFO L87 Difference]: Start difference. First operand 288 states and 338 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:52,551 INFO L93 Difference]: Finished difference Result 327 states and 384 transitions. [2022-02-24 01:12:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 01:12:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-02-24 01:12:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:52,553 INFO L225 Difference]: With dead ends: 327 [2022-02-24 01:12:52,553 INFO L226 Difference]: Without dead ends: 281 [2022-02-24 01:12:52,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=566, Invalid=3990, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 01:12:52,554 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 161 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:52,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 77 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-24 01:12:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 235. [2022-02-24 01:12:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 219 states have (on average 1.2009132420091324) internal successors, (263), 224 states have internal predecessors, (263), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 01:12:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2022-02-24 01:12:52,652 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 56 [2022-02-24 01:12:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:52,652 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2022-02-24 01:12:52,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2022-02-24 01:12:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 01:12:52,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:52,653 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:52,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:12:52,653 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:52,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1953283570, now seen corresponding path program 5 times [2022-02-24 01:12:52,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:52,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108596401] [2022-02-24 01:12:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:52,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:52,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:52,655 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:52,655 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:52,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:52,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:12:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:52,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 01:12:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:52,942 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:52,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108596401] [2022-02-24 01:12:52,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [108596401] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:52,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:52,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:12:52,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663701009] [2022-02-24 01:12:52,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:52,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:12:52,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:12:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:52,943 INFO L87 Difference]: Start difference. First operand 235 states and 282 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:53,638 INFO L93 Difference]: Finished difference Result 318 states and 382 transitions. [2022-02-24 01:12:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:12:53,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-02-24 01:12:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:53,640 INFO L225 Difference]: With dead ends: 318 [2022-02-24 01:12:53,640 INFO L226 Difference]: Without dead ends: 316 [2022-02-24 01:12:53,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:12:53,641 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 218 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:53,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 62 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-24 01:12:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 267. [2022-02-24 01:12:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 244 states have (on average 1.1885245901639345) internal successors, (290), 251 states have internal predecessors, (290), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 01:12:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 321 transitions. [2022-02-24 01:12:53,762 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 321 transitions. Word has length 57 [2022-02-24 01:12:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:53,762 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 321 transitions. [2022-02-24 01:12:53,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 321 transitions. [2022-02-24 01:12:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:12:53,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:53,763 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:53,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:12:53,763 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1889457963, now seen corresponding path program 3 times [2022-02-24 01:12:53,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:53,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97219816] [2022-02-24 01:12:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:53,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:53,765 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:53,765 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:53,766 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:54,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:54,185 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:54,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97219816] [2022-02-24 01:12:54,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [97219816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:54,186 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:54,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:12:54,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597212642] [2022-02-24 01:12:54,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:54,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:12:54,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:12:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:12:54,187 INFO L87 Difference]: Start difference. First operand 267 states and 321 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:55,332 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2022-02-24 01:12:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:12:55,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:12:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:55,333 INFO L225 Difference]: With dead ends: 312 [2022-02-24 01:12:55,333 INFO L226 Difference]: Without dead ends: 310 [2022-02-24 01:12:55,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=488, Invalid=2164, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:12:55,334 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:55,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 77 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-24 01:12:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 271. [2022-02-24 01:12:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 247 states have (on average 1.1862348178137652) internal successors, (293), 254 states have internal predecessors, (293), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 01:12:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 324 transitions. [2022-02-24 01:12:55,455 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 324 transitions. Word has length 56 [2022-02-24 01:12:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:55,455 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 324 transitions. [2022-02-24 01:12:55,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 324 transitions. [2022-02-24 01:12:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 01:12:55,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:55,456 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:55,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:12:55,456 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash 997874079, now seen corresponding path program 2 times [2022-02-24 01:12:55,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:55,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430781088] [2022-02-24 01:12:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:55,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:55,458 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:55,458 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:55,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:55,572 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:55,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430781088] [2022-02-24 01:12:55,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [430781088] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:55,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:55,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:12:55,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721864400] [2022-02-24 01:12:55,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:55,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:12:55,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:12:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:12:55,574 INFO L87 Difference]: Start difference. First operand 271 states and 324 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-02-24 01:12:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:56,111 INFO L93 Difference]: Finished difference Result 587 states and 709 transitions. [2022-02-24 01:12:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:12:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 57 [2022-02-24 01:12:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:56,113 INFO L225 Difference]: With dead ends: 587 [2022-02-24 01:12:56,113 INFO L226 Difference]: Without dead ends: 479 [2022-02-24 01:12:56,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:12:56,114 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 267 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:56,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 68 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-24 01:12:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 355. [2022-02-24 01:12:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 331 states have (on average 1.1691842900302114) internal successors, (387), 338 states have internal predecessors, (387), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 01:12:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 418 transitions. [2022-02-24 01:12:56,291 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 418 transitions. Word has length 57 [2022-02-24 01:12:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:56,291 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 418 transitions. [2022-02-24 01:12:56,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-02-24 01:12:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 418 transitions. [2022-02-24 01:12:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:12:56,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:56,292 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:56,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:12:56,292 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:56,292 INFO L85 PathProgramCache]: Analyzing trace with hash 358973142, now seen corresponding path program 1 times [2022-02-24 01:12:56,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:56,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000503936] [2022-02-24 01:12:56,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:56,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:56,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:56,295 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:56,295 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:56,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:56,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-24 01:12:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:56,674 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:56,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000503936] [2022-02-24 01:12:56,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000503936] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:56,674 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:56,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:12:56,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868319753] [2022-02-24 01:12:56,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:56,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:12:56,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:12:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:12:56,675 INFO L87 Difference]: Start difference. First operand 355 states and 418 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:58,242 INFO L93 Difference]: Finished difference Result 409 states and 481 transitions. [2022-02-24 01:12:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 01:12:58,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-02-24 01:12:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:58,244 INFO L225 Difference]: With dead ends: 409 [2022-02-24 01:12:58,244 INFO L226 Difference]: Without dead ends: 407 [2022-02-24 01:12:58,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=547, Invalid=3359, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:12:58,245 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 105 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:58,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 98 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-24 01:12:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 364. [2022-02-24 01:12:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 339 states have (on average 1.168141592920354) internal successors, (396), 347 states have internal predecessors, (396), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 01:12:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 429 transitions. [2022-02-24 01:12:58,425 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 429 transitions. Word has length 59 [2022-02-24 01:12:58,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:58,425 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 429 transitions. [2022-02-24 01:12:58,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 429 transitions. [2022-02-24 01:12:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:12:58,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:58,428 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:58,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:12:58,429 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash 356238102, now seen corresponding path program 3 times [2022-02-24 01:12:58,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:58,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46544988] [2022-02-24 01:12:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:58,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:58,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:58,432 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:58,432 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:59,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:59,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-24 01:12:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:59,294 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:59,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46544988] [2022-02-24 01:12:59,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [46544988] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:59,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:59,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:12:59,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570958002] [2022-02-24 01:12:59,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:59,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:12:59,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:59,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:12:59,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:12:59,295 INFO L87 Difference]: Start difference. First operand 364 states and 429 transitions. Second operand has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:01,126 INFO L93 Difference]: Finished difference Result 511 states and 600 transitions. [2022-02-24 01:13:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 01:13:01,127 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-02-24 01:13:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:01,130 INFO L225 Difference]: With dead ends: 511 [2022-02-24 01:13:01,130 INFO L226 Difference]: Without dead ends: 509 [2022-02-24 01:13:01,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=619, Invalid=4211, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 01:13:01,130 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 249 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:01,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 87 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-24 01:13:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 419. [2022-02-24 01:13:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 391 states have (on average 1.1611253196930946) internal successors, (454), 400 states have internal predecessors, (454), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 01:13:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 491 transitions. [2022-02-24 01:13:01,392 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 491 transitions. Word has length 59 [2022-02-24 01:13:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:01,394 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 491 transitions. [2022-02-24 01:13:01,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 491 transitions. [2022-02-24 01:13:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:13:01,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:01,396 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:01,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:13:01,396 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:01,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1033874973, now seen corresponding path program 3 times [2022-02-24 01:13:01,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:01,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358679576] [2022-02-24 01:13:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:01,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:01,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:01,399 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:01,399 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:01,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:01,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:01,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358679576] [2022-02-24 01:13:01,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [358679576] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:01,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:01,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:13:01,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558028366] [2022-02-24 01:13:01,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:01,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:13:01,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:13:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:01,840 INFO L87 Difference]: Start difference. First operand 419 states and 491 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:03,624 INFO L93 Difference]: Finished difference Result 572 states and 677 transitions. [2022-02-24 01:13:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 01:13:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 01:13:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:03,633 INFO L225 Difference]: With dead ends: 572 [2022-02-24 01:13:03,633 INFO L226 Difference]: Without dead ends: 570 [2022-02-24 01:13:03,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=3441, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:13:03,634 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 217 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:03,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 97 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-24 01:13:03,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 485. [2022-02-24 01:13:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 454 states have (on average 1.171806167400881) internal successors, (532), 465 states have internal predecessors, (532), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 9 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-24 01:13:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 573 transitions. [2022-02-24 01:13:03,886 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 573 transitions. Word has length 59 [2022-02-24 01:13:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:03,886 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 573 transitions. [2022-02-24 01:13:03,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 573 transitions. [2022-02-24 01:13:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:13:03,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:03,888 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:03,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:13:03,888 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1495218077, now seen corresponding path program 4 times [2022-02-24 01:13:03,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:03,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265266776] [2022-02-24 01:13:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:03,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:03,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:03,891 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:03,891 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:04,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:04,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:04,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265266776] [2022-02-24 01:13:04,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265266776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:04,614 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:04,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:13:04,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658015198] [2022-02-24 01:13:04,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:04,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:13:04,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:13:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:13:04,615 INFO L87 Difference]: Start difference. First operand 485 states and 573 transitions. Second operand has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:06,059 INFO L93 Difference]: Finished difference Result 592 states and 702 transitions. [2022-02-24 01:13:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:13:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 01:13:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:06,062 INFO L225 Difference]: With dead ends: 592 [2022-02-24 01:13:06,062 INFO L226 Difference]: Without dead ends: 590 [2022-02-24 01:13:06,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=3476, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:13:06,062 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 273 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:06,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 106 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:13:06,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-02-24 01:13:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 499. [2022-02-24 01:13:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 469 states have (on average 1.1769722814498933) internal successors, (552), 479 states have internal predecessors, (552), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 01:13:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 591 transitions. [2022-02-24 01:13:06,356 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 591 transitions. Word has length 59 [2022-02-24 01:13:06,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:06,356 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 591 transitions. [2022-02-24 01:13:06,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 591 transitions. [2022-02-24 01:13:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:13:06,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:06,358 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:06,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:13:06,358 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash -989126035, now seen corresponding path program 6 times [2022-02-24 01:13:06,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:06,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017972518] [2022-02-24 01:13:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:06,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:06,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:06,361 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:06,361 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:07,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:07,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:07,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017972518] [2022-02-24 01:13:07,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017972518] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:07,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:07,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:13:07,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816073894] [2022-02-24 01:13:07,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:07,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:13:07,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:13:07,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:13:07,146 INFO L87 Difference]: Start difference. First operand 499 states and 591 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:09,194 INFO L93 Difference]: Finished difference Result 729 states and 867 transitions. [2022-02-24 01:13:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 01:13:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 01:13:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:09,197 INFO L225 Difference]: With dead ends: 729 [2022-02-24 01:13:09,197 INFO L226 Difference]: Without dead ends: 727 [2022-02-24 01:13:09,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=625, Invalid=4345, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:13:09,198 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 340 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:09,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 99 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-02-24 01:13:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 503. [2022-02-24 01:13:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 472 states have (on average 1.1758474576271187) internal successors, (555), 482 states have internal predecessors, (555), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 01:13:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 594 transitions. [2022-02-24 01:13:09,482 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 594 transitions. Word has length 59 [2022-02-24 01:13:09,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:09,482 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 594 transitions. [2022-02-24 01:13:09,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 594 transitions. [2022-02-24 01:13:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:13:09,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:09,483 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:09,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:13:09,483 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:09,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:09,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1813715541, now seen corresponding path program 4 times [2022-02-24 01:13:09,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:09,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101195192] [2022-02-24 01:13:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:09,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:09,486 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:09,486 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:10,041 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:10,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101195192] [2022-02-24 01:13:10,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2101195192] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:10,041 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:10,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:13:10,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374662624] [2022-02-24 01:13:10,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:10,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:13:10,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:10,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:13:10,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:13:10,042 INFO L87 Difference]: Start difference. First operand 503 states and 594 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:11,267 INFO L93 Difference]: Finished difference Result 595 states and 703 transitions. [2022-02-24 01:13:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:13:11,267 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 01:13:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:11,269 INFO L225 Difference]: With dead ends: 595 [2022-02-24 01:13:11,269 INFO L226 Difference]: Without dead ends: 593 [2022-02-24 01:13:11,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=2273, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:13:11,269 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 139 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:11,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 64 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-02-24 01:13:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 533. [2022-02-24 01:13:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 499 states have (on average 1.1743486973947896) internal successors, (586), 511 states have internal predecessors, (586), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 9 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 01:13:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 629 transitions. [2022-02-24 01:13:11,559 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 629 transitions. Word has length 59 [2022-02-24 01:13:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:11,559 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 629 transitions. [2022-02-24 01:13:11,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 629 transitions. [2022-02-24 01:13:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:13:11,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:11,562 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:11,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:13:11,564 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:11,564 INFO L85 PathProgramCache]: Analyzing trace with hash -715377509, now seen corresponding path program 5 times [2022-02-24 01:13:11,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:11,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855090272] [2022-02-24 01:13:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:11,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:11,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:11,566 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:11,566 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:12,141 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:12,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855090272] [2022-02-24 01:13:12,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855090272] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:12,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:12,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:13:12,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61519011] [2022-02-24 01:13:12,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:12,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:13:12,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:12,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:13:12,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:13:12,142 INFO L87 Difference]: Start difference. First operand 533 states and 629 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:13,611 INFO L93 Difference]: Finished difference Result 619 states and 730 transitions. [2022-02-24 01:13:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:13:13,611 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 01:13:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:13,613 INFO L225 Difference]: With dead ends: 619 [2022-02-24 01:13:13,613 INFO L226 Difference]: Without dead ends: 617 [2022-02-24 01:13:13,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=2765, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 01:13:13,614 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 199 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:13,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 90 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-24 01:13:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 525. [2022-02-24 01:13:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 491 states have (on average 1.1731160896130346) internal successors, (576), 503 states have internal predecessors, (576), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 9 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 01:13:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 619 transitions. [2022-02-24 01:13:13,984 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 619 transitions. Word has length 59 [2022-02-24 01:13:13,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:13,985 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 619 transitions. [2022-02-24 01:13:13,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 619 transitions. [2022-02-24 01:13:13,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:13:13,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:13,986 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:13,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:13:13,987 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1054815615, now seen corresponding path program 2 times [2022-02-24 01:13:13,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:13,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258333346] [2022-02-24 01:13:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:13,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:13,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:13,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:13,990 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 01:13:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:13:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:14,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:14,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258333346] [2022-02-24 01:13:14,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [258333346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:14,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:14,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:13:14,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117876535] [2022-02-24 01:13:14,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:14,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:13:14,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:14,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:13:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:14,319 INFO L87 Difference]: Start difference. First operand 525 states and 619 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:15,435 INFO L93 Difference]: Finished difference Result 591 states and 697 transitions. [2022-02-24 01:13:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:13:15,436 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-02-24 01:13:15,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:15,437 INFO L225 Difference]: With dead ends: 591 [2022-02-24 01:13:15,437 INFO L226 Difference]: Without dead ends: 589 [2022-02-24 01:13:15,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=1463, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 01:13:15,438 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 199 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:15,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 78 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-02-24 01:13:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 523. [2022-02-24 01:13:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 489 states have (on average 1.1738241308793456) internal successors, (574), 502 states have internal predecessors, (574), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 8 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 01:13:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 617 transitions. [2022-02-24 01:13:15,740 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 617 transitions. Word has length 62 [2022-02-24 01:13:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:15,741 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 617 transitions. [2022-02-24 01:13:15,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 617 transitions. [2022-02-24 01:13:15,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:13:15,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:15,755 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:15,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:13:15,755 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1873320726, now seen corresponding path program 3 times [2022-02-24 01:13:15,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:15,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026834553] [2022-02-24 01:13:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:15,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:15,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:15,758 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:15,775 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:13:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:16,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:16,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026834553] [2022-02-24 01:13:16,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026834553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:16,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:16,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:13:16,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98198231] [2022-02-24 01:13:16,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:16,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:13:16,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:16,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:13:16,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:13:16,286 INFO L87 Difference]: Start difference. First operand 523 states and 617 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:17,856 INFO L93 Difference]: Finished difference Result 743 states and 883 transitions. [2022-02-24 01:13:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:13:17,856 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-02-24 01:13:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:17,858 INFO L225 Difference]: With dead ends: 743 [2022-02-24 01:13:17,858 INFO L226 Difference]: Without dead ends: 681 [2022-02-24 01:13:17,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=419, Invalid=3121, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 01:13:17,860 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 286 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:17,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 65 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:13:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-02-24 01:13:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 556. [2022-02-24 01:13:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 520 states have (on average 1.1788461538461539) internal successors, (613), 534 states have internal predecessors, (613), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (23), 9 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 01:13:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 660 transitions. [2022-02-24 01:13:18,187 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 660 transitions. Word has length 62 [2022-02-24 01:13:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:18,187 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 660 transitions. [2022-02-24 01:13:18,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 660 transitions. [2022-02-24 01:13:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:13:18,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:18,188 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:18,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:13:18,188 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2048520356, now seen corresponding path program 4 times [2022-02-24 01:13:18,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:18,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541898638] [2022-02-24 01:13:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:18,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:18,191 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:18,192 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:18,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:18,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:13:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:18,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:18,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541898638] [2022-02-24 01:13:18,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [541898638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:18,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:18,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:13:18,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160679242] [2022-02-24 01:13:18,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:18,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:13:18,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:18,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:13:18,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:18,491 INFO L87 Difference]: Start difference. First operand 556 states and 660 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:19,941 INFO L93 Difference]: Finished difference Result 671 states and 799 transitions. [2022-02-24 01:13:19,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:13:19,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-02-24 01:13:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:19,944 INFO L225 Difference]: With dead ends: 671 [2022-02-24 01:13:19,944 INFO L226 Difference]: Without dead ends: 669 [2022-02-24 01:13:19,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:13:19,945 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 181 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:19,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 96 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-24 01:13:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 577. [2022-02-24 01:13:20,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 540 states have (on average 1.1814814814814816) internal successors, (638), 555 states have internal predecessors, (638), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (24), 9 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-24 01:13:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 687 transitions. [2022-02-24 01:13:20,289 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 687 transitions. Word has length 62 [2022-02-24 01:13:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,289 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 687 transitions. [2022-02-24 01:13:20,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 687 transitions. [2022-02-24 01:13:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:13:20,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,291 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:13:20,291 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1980682524, now seen corresponding path program 4 times [2022-02-24 01:13:20,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002309993] [2022-02-24 01:13:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,293 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,293 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 01:13:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:20,842 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:20,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002309993] [2022-02-24 01:13:20,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002309993] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:20,842 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:20,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:13:20,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069989174] [2022-02-24 01:13:20,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:20,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:13:20,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:20,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:13:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:13:20,843 INFO L87 Difference]: Start difference. First operand 577 states and 687 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:22,605 INFO L93 Difference]: Finished difference Result 773 states and 924 transitions. [2022-02-24 01:13:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:13:22,606 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-02-24 01:13:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:22,608 INFO L225 Difference]: With dead ends: 773 [2022-02-24 01:13:22,608 INFO L226 Difference]: Without dead ends: 771 [2022-02-24 01:13:22,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 01:13:22,609 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 286 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:22,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 69 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-02-24 01:13:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 574. [2022-02-24 01:13:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 537 states have (on average 1.1824953445065176) internal successors, (635), 552 states have internal predecessors, (635), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (24), 9 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-24 01:13:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 684 transitions. [2022-02-24 01:13:22,954 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 684 transitions. Word has length 62 [2022-02-24 01:13:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:22,954 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 684 transitions. [2022-02-24 01:13:22,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 684 transitions. [2022-02-24 01:13:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 01:13:22,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:22,956 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:22,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:13:22,956 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:22,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1516193256, now seen corresponding path program 6 times [2022-02-24 01:13:22,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:22,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013517503] [2022-02-24 01:13:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:22,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:22,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:22,958 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:22,959 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:13:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 01:13:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 01:13:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:23,083 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:23,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013517503] [2022-02-24 01:13:23,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013517503] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:23,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:23,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:13:23,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503601035] [2022-02-24 01:13:23,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:23,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:13:23,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:13:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:23,084 INFO L87 Difference]: Start difference. First operand 574 states and 684 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:13:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:23,941 INFO L93 Difference]: Finished difference Result 738 states and 882 transitions. [2022-02-24 01:13:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:13:23,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-02-24 01:13:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:23,944 INFO L225 Difference]: With dead ends: 738 [2022-02-24 01:13:23,944 INFO L226 Difference]: Without dead ends: 675 [2022-02-24 01:13:23,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:13:23,944 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 208 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:23,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 81 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-02-24 01:13:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 552. [2022-02-24 01:13:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 518 states have (on average 1.1718146718146718) internal successors, (607), 532 states have internal predecessors, (607), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 9 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-24 01:13:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 653 transitions. [2022-02-24 01:13:24,282 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 653 transitions. Word has length 65 [2022-02-24 01:13:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:24,282 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 653 transitions. [2022-02-24 01:13:24,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:13:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 653 transitions. [2022-02-24 01:13:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:13:24,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:24,283 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:24,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:13:24,284 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1181046921, now seen corresponding path program 1 times [2022-02-24 01:13:24,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:24,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172401138] [2022-02-24 01:13:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:24,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:24,286 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:24,286 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:25,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:25,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 01:13:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:25,128 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:25,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172401138] [2022-02-24 01:13:25,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [172401138] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:25,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:25,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:13:25,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083064281] [2022-02-24 01:13:25,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:25,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:13:25,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:25,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:13:25,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:13:25,129 INFO L87 Difference]: Start difference. First operand 552 states and 653 transitions. Second operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:29,402 INFO L93 Difference]: Finished difference Result 932 states and 1119 transitions. [2022-02-24 01:13:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 01:13:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-24 01:13:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:29,405 INFO L225 Difference]: With dead ends: 932 [2022-02-24 01:13:29,405 INFO L226 Difference]: Without dead ends: 930 [2022-02-24 01:13:29,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1640, Invalid=9280, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 01:13:29,406 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 472 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:29,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 115 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:13:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-02-24 01:13:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 722. [2022-02-24 01:13:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 681 states have (on average 1.183553597650514) internal successors, (806), 699 states have internal predecessors, (806), 30 states have call successors, (30), 11 states have call predecessors, (30), 10 states have return successors, (28), 11 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-24 01:13:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 864 transitions. [2022-02-24 01:13:29,888 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 864 transitions. Word has length 64 [2022-02-24 01:13:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:29,889 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 864 transitions. [2022-02-24 01:13:29,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 864 transitions. [2022-02-24 01:13:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:13:29,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:29,890 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:29,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:13:29,890 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:29,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:29,890 INFO L85 PathProgramCache]: Analyzing trace with hash 968751897, now seen corresponding path program 4 times [2022-02-24 01:13:29,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:29,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852949392] [2022-02-24 01:13:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:29,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:29,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:29,893 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:29,893 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 01:13:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:30,723 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:30,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852949392] [2022-02-24 01:13:30,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852949392] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:30,723 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:30,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:13:30,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592520215] [2022-02-24 01:13:30,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:30,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:13:30,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:13:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:13:30,724 INFO L87 Difference]: Start difference. First operand 722 states and 864 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:32,706 INFO L93 Difference]: Finished difference Result 772 states and 919 transitions. [2022-02-24 01:13:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 01:13:32,706 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-24 01:13:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:32,708 INFO L225 Difference]: With dead ends: 772 [2022-02-24 01:13:32,708 INFO L226 Difference]: Without dead ends: 752 [2022-02-24 01:13:32,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=690, Invalid=5162, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 01:13:32,709 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:32,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 108 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-24 01:13:33,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 696. [2022-02-24 01:13:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 657 states have (on average 1.1856925418569255) internal successors, (779), 674 states have internal predecessors, (779), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 01:13:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 835 transitions. [2022-02-24 01:13:33,181 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 835 transitions. Word has length 64 [2022-02-24 01:13:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:33,181 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 835 transitions. [2022-02-24 01:13:33,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 835 transitions. [2022-02-24 01:13:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 01:13:33,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:33,183 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:33,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:13:33,183 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:33,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:33,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1602966465, now seen corresponding path program 7 times [2022-02-24 01:13:33,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:33,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486239215] [2022-02-24 01:13:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:33,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:33,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:33,185 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:33,185 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 01:13:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 01:13:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:33,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:33,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486239215] [2022-02-24 01:13:33,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486239215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:33,694 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:33,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:13:33,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557555269] [2022-02-24 01:13:33,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:33,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:13:33,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:33,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:13:33,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:13:33,695 INFO L87 Difference]: Start difference. First operand 696 states and 835 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:35,197 INFO L93 Difference]: Finished difference Result 944 states and 1141 transitions. [2022-02-24 01:13:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:13:35,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-02-24 01:13:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:35,200 INFO L225 Difference]: With dead ends: 944 [2022-02-24 01:13:35,200 INFO L226 Difference]: Without dead ends: 942 [2022-02-24 01:13:35,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 01:13:35,201 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 318 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:35,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 95 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-02-24 01:13:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 723. [2022-02-24 01:13:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 676 states have (on average 1.180473372781065) internal successors, (798), 696 states have internal predecessors, (798), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (34), 15 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-24 01:13:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 868 transitions. [2022-02-24 01:13:35,722 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 868 transitions. Word has length 65 [2022-02-24 01:13:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:35,726 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 868 transitions. [2022-02-24 01:13:35,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 868 transitions. [2022-02-24 01:13:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:13:35,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:35,727 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:35,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:13:35,727 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:35,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:35,727 INFO L85 PathProgramCache]: Analyzing trace with hash 873252058, now seen corresponding path program 5 times [2022-02-24 01:13:35,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:35,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174222797] [2022-02-24 01:13:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:35,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:35,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:35,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:35,733 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:36,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:36,402 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:36,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174222797] [2022-02-24 01:13:36,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [174222797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:36,402 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:36,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:13:36,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295869130] [2022-02-24 01:13:36,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:36,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:13:36,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:13:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:36,403 INFO L87 Difference]: Start difference. First operand 723 states and 868 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:38,036 INFO L93 Difference]: Finished difference Result 918 states and 1109 transitions. [2022-02-24 01:13:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:13:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:13:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:38,038 INFO L225 Difference]: With dead ends: 918 [2022-02-24 01:13:38,038 INFO L226 Difference]: Without dead ends: 798 [2022-02-24 01:13:38,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=366, Invalid=2184, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:13:38,042 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 153 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:38,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 67 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-02-24 01:13:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 747. [2022-02-24 01:13:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 700 states have (on average 1.1785714285714286) internal successors, (825), 720 states have internal predecessors, (825), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (34), 15 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-24 01:13:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 895 transitions. [2022-02-24 01:13:38,593 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 895 transitions. Word has length 64 [2022-02-24 01:13:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:38,593 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 895 transitions. [2022-02-24 01:13:38,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 895 transitions. [2022-02-24 01:13:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:13:38,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:38,594 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:38,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:13:38,595 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1868426852, now seen corresponding path program 6 times [2022-02-24 01:13:38,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:38,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055864446] [2022-02-24 01:13:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:38,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:38,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:38,597 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:38,597 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:39,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:39,093 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:39,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055864446] [2022-02-24 01:13:39,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2055864446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:39,093 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:39,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:13:39,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906668712] [2022-02-24 01:13:39,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:39,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:13:39,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:13:39,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:13:39,094 INFO L87 Difference]: Start difference. First operand 747 states and 895 transitions. Second operand has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:41,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:41,688 INFO L93 Difference]: Finished difference Result 982 states and 1180 transitions. [2022-02-24 01:13:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 01:13:41,689 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:13:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:41,691 INFO L225 Difference]: With dead ends: 982 [2022-02-24 01:13:41,691 INFO L226 Difference]: Without dead ends: 980 [2022-02-24 01:13:41,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=889, Invalid=5431, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 01:13:41,692 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 346 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:41,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 103 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:13:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-02-24 01:13:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 767. [2022-02-24 01:13:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 716 states have (on average 1.1773743016759777) internal successors, (843), 738 states have internal predecessors, (843), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 15 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-24 01:13:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 917 transitions. [2022-02-24 01:13:42,238 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 917 transitions. Word has length 64 [2022-02-24 01:13:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:42,238 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 917 transitions. [2022-02-24 01:13:42,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 917 transitions. [2022-02-24 01:13:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:13:42,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:42,239 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:42,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 01:13:42,240 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1566333674, now seen corresponding path program 6 times [2022-02-24 01:13:42,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:42,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261268614] [2022-02-24 01:13:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:42,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:42,242 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:42,242 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:42,891 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:42,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261268614] [2022-02-24 01:13:42,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [261268614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:42,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:42,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:13:42,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322928525] [2022-02-24 01:13:42,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:42,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:13:42,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:13:42,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:13:42,892 INFO L87 Difference]: Start difference. First operand 767 states and 917 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:45,290 INFO L93 Difference]: Finished difference Result 1189 states and 1436 transitions. [2022-02-24 01:13:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 01:13:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:13:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:45,294 INFO L225 Difference]: With dead ends: 1189 [2022-02-24 01:13:45,294 INFO L226 Difference]: Without dead ends: 973 [2022-02-24 01:13:45,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=906, Invalid=4794, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 01:13:45,295 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 280 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:45,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 112 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-02-24 01:13:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 799. [2022-02-24 01:13:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 748 states have (on average 1.1818181818181819) internal successors, (884), 770 states have internal predecessors, (884), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 15 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-24 01:13:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 958 transitions. [2022-02-24 01:13:45,871 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 958 transitions. Word has length 64 [2022-02-24 01:13:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:45,871 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 958 transitions. [2022-02-24 01:13:45,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 958 transitions. [2022-02-24 01:13:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:13:45,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:45,872 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:45,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 01:13:45,872 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:45,872 INFO L85 PathProgramCache]: Analyzing trace with hash 998054042, now seen corresponding path program 7 times [2022-02-24 01:13:45,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:45,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865784502] [2022-02-24 01:13:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:45,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:45,874 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:45,875 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:45,875 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:46,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:46,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:46,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865784502] [2022-02-24 01:13:46,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [865784502] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:46,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:46,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:13:46,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467015422] [2022-02-24 01:13:46,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:46,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:13:46,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:46,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:13:46,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:13:46,517 INFO L87 Difference]: Start difference. First operand 799 states and 958 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:48,595 INFO L93 Difference]: Finished difference Result 1048 states and 1258 transitions. [2022-02-24 01:13:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 01:13:48,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:13:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:48,598 INFO L225 Difference]: With dead ends: 1048 [2022-02-24 01:13:48,598 INFO L226 Difference]: Without dead ends: 908 [2022-02-24 01:13:48,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=534, Invalid=4022, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 01:13:48,599 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 178 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:48,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 123 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-02-24 01:13:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 826. [2022-02-24 01:13:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 772 states have (on average 1.182642487046632) internal successors, (913), 796 states have internal predecessors, (913), 40 states have call successors, (40), 14 states have call predecessors, (40), 13 states have return successors, (38), 15 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-24 01:13:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 991 transitions. [2022-02-24 01:13:49,196 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 991 transitions. Word has length 64 [2022-02-24 01:13:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:49,196 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 991 transitions. [2022-02-24 01:13:49,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 991 transitions. [2022-02-24 01:13:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:13:49,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:49,197 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:49,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 01:13:49,198 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:49,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:49,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1363947086, now seen corresponding path program 8 times [2022-02-24 01:13:49,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:49,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331226255] [2022-02-24 01:13:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:49,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:49,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:49,200 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:49,200 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:49,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:49,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331226255] [2022-02-24 01:13:49,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1331226255] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:49,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:49,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:13:49,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578409045] [2022-02-24 01:13:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:49,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:13:49,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:13:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:13:49,694 INFO L87 Difference]: Start difference. First operand 826 states and 991 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:51,173 INFO L93 Difference]: Finished difference Result 984 states and 1181 transitions. [2022-02-24 01:13:51,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:13:51,173 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:13:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:51,176 INFO L225 Difference]: With dead ends: 984 [2022-02-24 01:13:51,176 INFO L226 Difference]: Without dead ends: 982 [2022-02-24 01:13:51,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=336, Invalid=2016, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:13:51,176 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 129 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:51,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 75 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-02-24 01:13:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 880. [2022-02-24 01:13:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 823 states have (on average 1.1871202916160388) internal successors, (977), 849 states have internal predecessors, (977), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (40), 15 states have call predecessors, (40), 40 states have call successors, (40) [2022-02-24 01:13:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1059 transitions. [2022-02-24 01:13:51,815 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1059 transitions. Word has length 64 [2022-02-24 01:13:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:51,815 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1059 transitions. [2022-02-24 01:13:51,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1059 transitions. [2022-02-24 01:13:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 01:13:51,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:51,817 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:51,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 01:13:51,817 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:51,817 INFO L85 PathProgramCache]: Analyzing trace with hash -777241936, now seen corresponding path program 2 times [2022-02-24 01:13:51,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:51,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536662037] [2022-02-24 01:13:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:51,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:51,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:51,821 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:51,821 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 01:13:51,860 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 01:13:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 01:13:51,897 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 01:13:51,898 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 01:13:51,899 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 01:13:51,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 01:13:51,902 INFO L732 BasicCegarLoop]: Path program histogram: [8, 7, 6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1] [2022-02-24 01:13:51,904 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 01:13:51,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 01:13:51 BoogieIcfgContainer [2022-02-24 01:13:51,914 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 01:13:51,914 INFO L158 Benchmark]: Toolchain (without parser) took 89743.39ms. Allocated memory was 195.0MB in the beginning and 950.0MB in the end (delta: 755.0MB). Free memory was 141.9MB in the beginning and 615.1MB in the end (delta: -473.3MB). Peak memory consumption was 281.7MB. Max. memory is 8.0GB. [2022-02-24 01:13:51,914 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 195.0MB. Free memory is still 158.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 01:13:51,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.15ms. Allocated memory is still 195.0MB. Free memory was 141.7MB in the beginning and 168.6MB in the end (delta: -26.8MB). Peak memory consumption was 6.7MB. Max. memory is 8.0GB. [2022-02-24 01:13:51,915 INFO L158 Benchmark]: Boogie Preprocessor took 21.53ms. Allocated memory is still 195.0MB. Free memory was 168.6MB in the beginning and 167.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-24 01:13:51,915 INFO L158 Benchmark]: RCFGBuilder took 271.10ms. Allocated memory is still 195.0MB. Free memory was 166.9MB in the beginning and 155.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-24 01:13:51,915 INFO L158 Benchmark]: TraceAbstraction took 89255.32ms. Allocated memory was 195.0MB in the beginning and 950.0MB in the end (delta: 755.0MB). Free memory was 154.9MB in the beginning and 615.1MB in the end (delta: -460.2MB). Peak memory consumption was 295.7MB. Max. memory is 8.0GB. [2022-02-24 01:13:51,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 195.0MB. Free memory is still 158.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 187.15ms. Allocated memory is still 195.0MB. Free memory was 141.7MB in the beginning and 168.6MB in the end (delta: -26.8MB). Peak memory consumption was 6.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.53ms. Allocated memory is still 195.0MB. Free memory was 168.6MB in the beginning and 167.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 271.10ms. Allocated memory is still 195.0MB. Free memory was 166.9MB in the beginning and 155.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 89255.32ms. Allocated memory was 195.0MB in the beginning and 950.0MB in the end (delta: 755.0MB). Free memory was 154.9MB in the beginning and 615.1MB in the end (delta: -460.2MB). Peak memory consumption was 295.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j