/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/loop-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:42:59,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:42:59,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:42:59,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:42:59,870 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:42:59,877 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:42:59,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:42:59,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:42:59,879 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:42:59,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:42:59,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:42:59,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:42:59,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:42:59,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:42:59,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:42:59,880 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:42:59,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:42:59,880 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:42:59,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:42:59,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:42:59,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:42:59,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:42:59,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:42:59,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:42:59,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:42:59,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:42:59,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:42:59,881 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:42:59,881 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:43:00,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:43:00,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:43:00,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:43:00,076 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:43:00,077 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:43:00,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-02-15 01:43:00,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868a8c3db/5f6b1d4f4f0a43ada94af5c6526847e7/FLAG2c5a0e5f0 [2022-02-15 01:43:00,529 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:43:00,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-02-15 01:43:00,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868a8c3db/5f6b1d4f4f0a43ada94af5c6526847e7/FLAG2c5a0e5f0 [2022-02-15 01:43:00,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868a8c3db/5f6b1d4f4f0a43ada94af5c6526847e7 [2022-02-15 01:43:00,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:43:00,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:43:00,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:43:00,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:43:00,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:43:00,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17afb632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00, skipping insertion in model container [2022-02-15 01:43:00,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:43:00,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:43:00,714 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-02-15 01:43:00,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:43:00,737 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:43:00,745 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-02-15 01:43:00,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:43:00,763 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:43:00,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00 WrapperNode [2022-02-15 01:43:00,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:43:00,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:43:00,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:43:00,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:43:00,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:43:00,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:43:00,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:43:00,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:43:00,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00" (1/1) ... [2022-02-15 01:43:00,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:43:00,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:43:00,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:43:00,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:43:00,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:43:00,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:43:00,901 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:43:00,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:43:00,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:43:00,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:43:00,902 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:43:00,902 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:43:00,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:43:00,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:43:00,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:43:00,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:43:00,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:43:00,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:43:00,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:43:00,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:43:00,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:43:00,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:43:00,950 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:43:00,951 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:43:01,042 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:43:01,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:43:01,046 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 01:43:01,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:43:01 BoogieIcfgContainer [2022-02-15 01:43:01,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:43:01,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:43:01,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:43:01,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:43:01,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:43:00" (1/3) ... [2022-02-15 01:43:01,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbece81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:43:01, skipping insertion in model container [2022-02-15 01:43:01,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:43:00" (2/3) ... [2022-02-15 01:43:01,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbece81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:43:01, skipping insertion in model container [2022-02-15 01:43:01,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:43:01" (3/3) ... [2022-02-15 01:43:01,053 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2022-02-15 01:43:01,056 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:43:01,056 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:43:01,114 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:43:01,119 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:43:01,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:43:01,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-02-15 01:43:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:43:01,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:01,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:01,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1677248157, now seen corresponding path program 1 times [2022-02-15 01:43:01,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:01,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559633162] [2022-02-15 01:43:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:01,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:01,185 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:43:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:01,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:01,356 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:01,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559633162] [2022-02-15 01:43:01,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [559633162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:01,358 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:01,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:43:01,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908088961] [2022-02-15 01:43:01,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:01,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:43:01,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:01,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:43:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:43:01,383 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:01,450 INFO L93 Difference]: Finished difference Result 40 states and 61 transitions. [2022-02-15 01:43:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:43:01,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-15 01:43:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:01,458 INFO L225 Difference]: With dead ends: 40 [2022-02-15 01:43:01,458 INFO L226 Difference]: Without dead ends: 23 [2022-02-15 01:43:01,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:43:01,466 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:01,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:43:01,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-15 01:43:01,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-02-15 01:43:01,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-02-15 01:43:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-02-15 01:43:01,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2022-02-15 01:43:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:01,494 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-02-15 01:43:01,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-02-15 01:43:01,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:43:01,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:01,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:01,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:43:01,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash -946078686, now seen corresponding path program 1 times [2022-02-15 01:43:01,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:01,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608660087] [2022-02-15 01:43:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:01,668 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:01,668 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:01,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:01,748 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:01,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608660087] [2022-02-15 01:43:01,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [608660087] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:01,749 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:01,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:43:01,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998709650] [2022-02-15 01:43:01,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:01,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:43:01,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:43:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:43:01,752 INFO L87 Difference]: Start difference. First operand 20 states and 24 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) [2022-02-15 01:43:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:01,939 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-02-15 01:43:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:43:01,940 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 [2022-02-15 01:43:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:01,942 INFO L225 Difference]: With dead ends: 50 [2022-02-15 01:43:01,942 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 01:43:01,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:43:01,943 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:01,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 01:43:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-02-15 01:43:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 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) [2022-02-15 01:43:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-02-15 01:43:01,951 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2022-02-15 01:43:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:01,952 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-02-15 01:43:01,952 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) [2022-02-15 01:43:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-02-15 01:43:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:43:01,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:01,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:01,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:43:01,953 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:01,953 INFO L85 PathProgramCache]: Analyzing trace with hash -944231644, now seen corresponding path program 1 times [2022-02-15 01:43:01,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:01,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694225307] [2022-02-15 01:43:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:02,019 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:02,020 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:02,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:02,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:02,172 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:02,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694225307] [2022-02-15 01:43:02,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694225307] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:02,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:02,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:43:02,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413836250] [2022-02-15 01:43:02,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:02,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:43:02,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:02,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:43:02,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:43:02,175 INFO L87 Difference]: Start difference. First operand 28 states and 35 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) [2022-02-15 01:43:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:02,257 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2022-02-15 01:43:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:43:02,257 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 [2022-02-15 01:43:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:02,258 INFO L225 Difference]: With dead ends: 58 [2022-02-15 01:43:02,258 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 01:43:02,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:43:02,259 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:02,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 42 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 01:43:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-02-15 01:43:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-02-15 01:43:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-02-15 01:43:02,265 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2022-02-15 01:43:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:02,265 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-02-15 01:43:02,265 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) [2022-02-15 01:43:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-02-15 01:43:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:43:02,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:02,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:02,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:43:02,266 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:02,267 INFO L85 PathProgramCache]: Analyzing trace with hash -206914972, now seen corresponding path program 1 times [2022-02-15 01:43:02,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:02,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890797176] [2022-02-15 01:43:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:02,329 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:02,329 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:02,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:02,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:02,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:02,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890797176] [2022-02-15 01:43:02,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [890797176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:02,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:02,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:43:02,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548789042] [2022-02-15 01:43:02,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:02,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:43:02,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:43:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:43:02,603 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 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) [2022-02-15 01:43:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:02,829 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-02-15 01:43:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:43:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 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 [2022-02-15 01:43:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:02,830 INFO L225 Difference]: With dead ends: 56 [2022-02-15 01:43:02,830 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 01:43:02,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:43:02,831 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:02,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 58 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 01:43:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2022-02-15 01:43:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 36 states have internal predecessors, (45), 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) [2022-02-15 01:43:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-02-15 01:43:02,839 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 17 [2022-02-15 01:43:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:02,839 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-02-15 01:43:02,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 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) [2022-02-15 01:43:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-02-15 01:43:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:43:02,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:02,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:02,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:43:02,840 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2068588025, now seen corresponding path program 1 times [2022-02-15 01:43:02,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:02,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284958844] [2022-02-15 01:43:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:02,893 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:02,893 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:02,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:03,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:03,002 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:03,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:03,216 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:03,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284958844] [2022-02-15 01:43:03,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284958844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:03,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:03,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:43:03,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297379177] [2022-02-15 01:43:03,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:03,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:43:03,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:43:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:43:03,218 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:03,415 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2022-02-15 01:43:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:43:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 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 20 [2022-02-15 01:43:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:03,416 INFO L225 Difference]: With dead ends: 91 [2022-02-15 01:43:03,416 INFO L226 Difference]: Without dead ends: 67 [2022-02-15 01:43:03,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:43:03,417 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:03,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 64 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-15 01:43:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2022-02-15 01:43:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 44 states have internal predecessors, (55), 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) [2022-02-15 01:43:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2022-02-15 01:43:03,425 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 20 [2022-02-15 01:43:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:03,426 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2022-02-15 01:43:03,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2022-02-15 01:43:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 01:43:03,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:03,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:03,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:43:03,427 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1319592892, now seen corresponding path program 2 times [2022-02-15 01:43:03,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:03,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825743528] [2022-02-15 01:43:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:03,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:03,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:03,521 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:03,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:03,611 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:03,611 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:03,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:03,871 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:03,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825743528] [2022-02-15 01:43:03,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825743528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:03,871 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:03,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:43:03,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779086432] [2022-02-15 01:43:03,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:03,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:43:03,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:43:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:43:03,872 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 14 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) [2022-02-15 01:43:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:04,143 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2022-02-15 01:43:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:43:04,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 01:43:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:04,148 INFO L225 Difference]: With dead ends: 101 [2022-02-15 01:43:04,148 INFO L226 Difference]: Without dead ends: 77 [2022-02-15 01:43:04,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:43:04,150 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:04,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 76 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-15 01:43:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2022-02-15 01:43:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 47 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) [2022-02-15 01:43:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-02-15 01:43:04,173 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 23 [2022-02-15 01:43:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:04,174 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-02-15 01:43:04,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 14 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) [2022-02-15 01:43:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-02-15 01:43:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:43:04,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:04,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:04,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:43:04,176 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash -360688409, now seen corresponding path program 3 times [2022-02-15 01:43:04,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:04,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786712351] [2022-02-15 01:43:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:04,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:04,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:04,270 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:04,328 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:04,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:04,377 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:04,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:04,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:04,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786712351] [2022-02-15 01:43:04,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786712351] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:04,707 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:04,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:43:04,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576968914] [2022-02-15 01:43:04,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:04,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:43:04,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:43:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:43:04,708 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:05,097 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-02-15 01:43:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:43:05,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (3), 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 26 [2022-02-15 01:43:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:05,098 INFO L225 Difference]: With dead ends: 105 [2022-02-15 01:43:05,098 INFO L226 Difference]: Without dead ends: 81 [2022-02-15 01:43:05,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:43:05,099 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:05,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 106 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:43:05,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-15 01:43:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2022-02-15 01:43:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 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) [2022-02-15 01:43:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2022-02-15 01:43:05,107 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 26 [2022-02-15 01:43:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:05,107 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2022-02-15 01:43:05,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2022-02-15 01:43:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:43:05,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:05,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:05,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:43:05,108 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash -619739864, now seen corresponding path program 1 times [2022-02-15 01:43:05,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:05,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810613961] [2022-02-15 01:43:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:05,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:05,136 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:05,136 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:05,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:05,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:05,220 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:05,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810613961] [2022-02-15 01:43:05,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [810613961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:05,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:05,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:43:05,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635473521] [2022-02-15 01:43:05,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:05,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:43:05,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:43:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:43:05,222 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 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) [2022-02-15 01:43:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:05,268 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2022-02-15 01:43:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:43:05,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 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) Word has length 29 [2022-02-15 01:43:05,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:05,268 INFO L225 Difference]: With dead ends: 102 [2022-02-15 01:43:05,269 INFO L226 Difference]: Without dead ends: 71 [2022-02-15 01:43:05,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:43:05,269 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:05,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:43:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-15 01:43:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-02-15 01:43:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 54 states have internal predecessors, (67), 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) [2022-02-15 01:43:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-02-15 01:43:05,277 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 29 [2022-02-15 01:43:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:05,277 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-02-15 01:43:05,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 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) [2022-02-15 01:43:05,277 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-02-15 01:43:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:43:05,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:05,278 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:05,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:43:05,278 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:05,278 INFO L85 PathProgramCache]: Analyzing trace with hash 535278948, now seen corresponding path program 4 times [2022-02-15 01:43:05,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:05,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725402084] [2022-02-15 01:43:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:05,334 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:05,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:05,380 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:05,420 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:05,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:05,466 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:05,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:05,785 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:05,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725402084] [2022-02-15 01:43:05,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725402084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:05,786 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:05,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:43:05,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927127926] [2022-02-15 01:43:05,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:05,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:43:05,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:05,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:43:05,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:43:05,787 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:06,219 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2022-02-15 01:43:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:43:06,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 01:43:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:06,220 INFO L225 Difference]: With dead ends: 114 [2022-02-15 01:43:06,220 INFO L226 Difference]: Without dead ends: 88 [2022-02-15 01:43:06,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:43:06,221 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:06,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 76 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:43:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-15 01:43:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2022-02-15 01:43:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 57 states have internal predecessors, (71), 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) [2022-02-15 01:43:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-02-15 01:43:06,248 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 29 [2022-02-15 01:43:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:06,248 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-02-15 01:43:06,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-02-15 01:43:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:43:06,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:06,249 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:06,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:43:06,249 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -922933305, now seen corresponding path program 5 times [2022-02-15 01:43:06,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:06,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208166840] [2022-02-15 01:43:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:06,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:06,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:06,343 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:06,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:06,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:06,423 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:06,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:06,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:06,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:06,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208166840] [2022-02-15 01:43:06,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1208166840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:06,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:06,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:43:06,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601118991] [2022-02-15 01:43:06,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:06,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:43:06,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:43:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:43:06,792 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:07,208 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2022-02-15 01:43:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:43:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:43:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:07,209 INFO L225 Difference]: With dead ends: 118 [2022-02-15 01:43:07,209 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 01:43:07,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:43:07,210 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:07,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 71 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:43:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 01:43:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2022-02-15 01:43:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.271186440677966) internal successors, (75), 60 states have internal predecessors, (75), 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) [2022-02-15 01:43:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-02-15 01:43:07,217 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 32 [2022-02-15 01:43:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:07,217 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-02-15 01:43:07,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-02-15 01:43:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:43:07,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:07,218 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:07,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:43:07,218 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1916593726, now seen corresponding path program 1 times [2022-02-15 01:43:07,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:07,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229473323] [2022-02-15 01:43:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:07,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:07,232 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:07,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:07,293 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:07,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229473323] [2022-02-15 01:43:07,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [229473323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:07,293 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:07,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:43:07,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886144275] [2022-02-15 01:43:07,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:07,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:43:07,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:07,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:43:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:43:07,294 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:07,363 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2022-02-15 01:43:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:43:07,363 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-02-15 01:43:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:07,364 INFO L225 Difference]: With dead ends: 131 [2022-02-15 01:43:07,364 INFO L226 Difference]: Without dead ends: 97 [2022-02-15 01:43:07,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:43:07,365 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:07,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-15 01:43:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2022-02-15 01:43:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 74 states have internal predecessors, (91), 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) [2022-02-15 01:43:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2022-02-15 01:43:07,374 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 35 [2022-02-15 01:43:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:07,374 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2022-02-15 01:43:07,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2022-02-15 01:43:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:43:07,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:07,375 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:07,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:43:07,375 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1070036612, now seen corresponding path program 6 times [2022-02-15 01:43:07,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:07,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672294714] [2022-02-15 01:43:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:07,415 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:07,461 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:07,462 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:07,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:07,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:07,574 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:07,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:07,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:07,922 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:07,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672294714] [2022-02-15 01:43:07,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [672294714] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:07,922 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:07,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:43:07,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497548524] [2022-02-15 01:43:07,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:07,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:43:07,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:07,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:43:07,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:43:07,923 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:08,400 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2022-02-15 01:43:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:43:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:43:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:08,405 INFO L225 Difference]: With dead ends: 142 [2022-02-15 01:43:08,405 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:43:08,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:43:08,406 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:08,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 88 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:43:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:43:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 84. [2022-02-15 01:43:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 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) [2022-02-15 01:43:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-02-15 01:43:08,415 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 35 [2022-02-15 01:43:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:08,415 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-02-15 01:43:08,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:08,415 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-02-15 01:43:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:43:08,416 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:08,416 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:08,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:43:08,416 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash 8934055, now seen corresponding path program 7 times [2022-02-15 01:43:08,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:08,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203641512] [2022-02-15 01:43:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:08,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:08,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:08,525 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:08,572 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:08,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:08,629 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:08,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:09,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:09,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203641512] [2022-02-15 01:43:09,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [203641512] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:09,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:09,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:43:09,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571581466] [2022-02-15 01:43:09,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:09,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:43:09,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:43:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:43:09,074 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 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) [2022-02-15 01:43:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:09,617 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2022-02-15 01:43:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:43:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 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 [2022-02-15 01:43:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:09,618 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:43:09,619 INFO L226 Difference]: Without dead ends: 114 [2022-02-15 01:43:09,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:43:09,621 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:09,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 76 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:43:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-15 01:43:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2022-02-15 01:43:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 80 states have internal predecessors, (99), 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) [2022-02-15 01:43:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-02-15 01:43:09,638 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 38 [2022-02-15 01:43:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:09,638 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-02-15 01:43:09,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 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) [2022-02-15 01:43:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-02-15 01:43:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:43:09,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:09,639 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:09,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:43:09,640 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:09,640 INFO L85 PathProgramCache]: Analyzing trace with hash -499938394, now seen corresponding path program 2 times [2022-02-15 01:43:09,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:09,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515856546] [2022-02-15 01:43:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:09,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:09,654 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:09,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:09,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:09,755 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:09,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515856546] [2022-02-15 01:43:09,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [515856546] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:09,755 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:09,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:43:09,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853533466] [2022-02-15 01:43:09,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:09,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:43:09,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:09,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:43:09,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:43:09,756 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 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) [2022-02-15 01:43:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:09,842 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2022-02-15 01:43:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:43:09,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 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) Word has length 41 [2022-02-15 01:43:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:09,843 INFO L225 Difference]: With dead ends: 167 [2022-02-15 01:43:09,843 INFO L226 Difference]: Without dead ends: 127 [2022-02-15 01:43:09,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:43:09,844 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:09,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-15 01:43:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2022-02-15 01:43:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 97 states have internal predecessors, (118), 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) [2022-02-15 01:43:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2022-02-15 01:43:09,856 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 41 [2022-02-15 01:43:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:09,856 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2022-02-15 01:43:09,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 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) [2022-02-15 01:43:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2022-02-15 01:43:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:43:09,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:09,857 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:09,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:43:09,857 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:09,857 INFO L85 PathProgramCache]: Analyzing trace with hash -338042972, now seen corresponding path program 8 times [2022-02-15 01:43:09,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:09,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058286022] [2022-02-15 01:43:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:09,894 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:09,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:09,937 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:09,977 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:10,019 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:10,020 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:10,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:10,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:10,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:10,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058286022] [2022-02-15 01:43:10,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058286022] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:10,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:10,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:43:10,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590248804] [2022-02-15 01:43:10,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:10,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:43:10,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:10,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:43:10,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:43:10,735 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 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) [2022-02-15 01:43:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:11,275 INFO L93 Difference]: Finished difference Result 185 states and 224 transitions. [2022-02-15 01:43:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:43:11,276 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 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 [2022-02-15 01:43:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:11,277 INFO L225 Difference]: With dead ends: 185 [2022-02-15 01:43:11,277 INFO L226 Difference]: Without dead ends: 147 [2022-02-15 01:43:11,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:43:11,278 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:11,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 98 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:43:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-02-15 01:43:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 99. [2022-02-15 01:43:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 91 states have (on average 1.2417582417582418) internal successors, (113), 92 states have internal predecessors, (113), 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) [2022-02-15 01:43:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2022-02-15 01:43:11,294 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 41 [2022-02-15 01:43:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:11,294 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2022-02-15 01:43:11,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 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) [2022-02-15 01:43:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2022-02-15 01:43:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:43:11,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:11,295 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:11,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:43:11,295 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash 855627143, now seen corresponding path program 9 times [2022-02-15 01:43:11,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:11,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792971503] [2022-02-15 01:43:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:11,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:11,384 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:11,384 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:11,417 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:11,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:11,497 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:11,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:11,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:12,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:12,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792971503] [2022-02-15 01:43:12,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1792971503] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:12,036 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:12,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:43:12,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897601347] [2022-02-15 01:43:12,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:12,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:43:12,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:43:12,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:43:12,039 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 28 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:12,493 INFO L93 Difference]: Finished difference Result 189 states and 229 transitions. [2022-02-15 01:43:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:43:12,493 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 28 states have internal predecessors, (40), 2 states have call successors, (3), 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 44 [2022-02-15 01:43:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:12,494 INFO L225 Difference]: With dead ends: 189 [2022-02-15 01:43:12,494 INFO L226 Difference]: Without dead ends: 151 [2022-02-15 01:43:12,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:43:12,495 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:12,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 58 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:43:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-15 01:43:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 102. [2022-02-15 01:43:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 95 states have internal predecessors, (116), 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) [2022-02-15 01:43:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2022-02-15 01:43:12,520 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 44 [2022-02-15 01:43:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:12,521 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2022-02-15 01:43:12,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 28 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2022-02-15 01:43:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:43:12,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:12,522 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:12,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:43:12,522 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash 533646915, now seen corresponding path program 10 times [2022-02-15 01:43:12,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:12,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533511983] [2022-02-15 01:43:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:12,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:12,624 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:12,625 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:12,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:12,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:12,712 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:12,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:13,504 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:13,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533511983] [2022-02-15 01:43:13,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [533511983] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:13,504 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:13,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:43:13,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903753634] [2022-02-15 01:43:13,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:13,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:43:13,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:43:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:43:13,505 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:14,483 INFO L93 Difference]: Finished difference Result 194 states and 235 transitions. [2022-02-15 01:43:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:43:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 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 44 [2022-02-15 01:43:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:14,484 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:43:14,485 INFO L226 Difference]: Without dead ends: 156 [2022-02-15 01:43:14,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=2103, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:43:14,486 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:14,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 111 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:43:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-15 01:43:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 102. [2022-02-15 01:43:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 95 states have internal predecessors, (117), 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) [2022-02-15 01:43:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2022-02-15 01:43:14,524 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 44 [2022-02-15 01:43:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:14,525 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2022-02-15 01:43:14,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2022-02-15 01:43:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:43:14,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:14,526 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:14,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:43:14,526 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:14,526 INFO L85 PathProgramCache]: Analyzing trace with hash -625431166, now seen corresponding path program 3 times [2022-02-15 01:43:14,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:14,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086034841] [2022-02-15 01:43:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:14,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:14,554 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:14,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:14,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:14,680 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:14,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086034841] [2022-02-15 01:43:14,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086034841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:14,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:14,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:43:14,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093645132] [2022-02-15 01:43:14,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:14,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:43:14,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:43:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:43:14,681 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 2 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) [2022-02-15 01:43:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:14,780 INFO L93 Difference]: Finished difference Result 201 states and 244 transitions. [2022-02-15 01:43:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:43:14,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 2 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) Word has length 47 [2022-02-15 01:43:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:14,781 INFO L225 Difference]: With dead ends: 201 [2022-02-15 01:43:14,781 INFO L226 Difference]: Without dead ends: 155 [2022-02-15 01:43:14,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:43:14,782 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:14,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 32 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-15 01:43:14,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 119. [2022-02-15 01:43:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 112 states have internal predecessors, (136), 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) [2022-02-15 01:43:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2022-02-15 01:43:14,802 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 47 [2022-02-15 01:43:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:14,802 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2022-02-15 01:43:14,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 2 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) [2022-02-15 01:43:14,803 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2022-02-15 01:43:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:43:14,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:14,803 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:14,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:43:14,803 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash -847187772, now seen corresponding path program 11 times [2022-02-15 01:43:14,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:14,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208437695] [2022-02-15 01:43:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:14,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:14,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:14,877 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:14,935 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:14,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:14,995 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:14,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:15,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:15,562 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:15,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208437695] [2022-02-15 01:43:15,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1208437695] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:15,562 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:15,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:43:15,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354640132] [2022-02-15 01:43:15,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:15,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:43:15,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:15,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:43:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:43:15,563 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand has 32 states, 32 states have (on average 1.34375) internal successors, (43), 30 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:16,557 INFO L93 Difference]: Finished difference Result 226 states and 272 transitions. [2022-02-15 01:43:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:43:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 30 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:43:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:16,562 INFO L225 Difference]: With dead ends: 226 [2022-02-15 01:43:16,562 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:43:16,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:43:16,563 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:16,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 128 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:43:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:43:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 133. [2022-02-15 01:43:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 125 states have (on average 1.216) internal successors, (152), 126 states have internal predecessors, (152), 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) [2022-02-15 01:43:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2022-02-15 01:43:16,593 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 47 [2022-02-15 01:43:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:16,593 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2022-02-15 01:43:16,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 30 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2022-02-15 01:43:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:43:16,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:16,594 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:16,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:43:16,594 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1547587481, now seen corresponding path program 12 times [2022-02-15 01:43:16,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:16,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344238521] [2022-02-15 01:43:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:16,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:16,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:16,665 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:16,699 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:16,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:16,735 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:16,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:16,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:17,229 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:17,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344238521] [2022-02-15 01:43:17,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [344238521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:17,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:17,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:43:17,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475606214] [2022-02-15 01:43:17,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:17,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:43:17,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:43:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:43:17,232 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 32 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:17,954 INFO L93 Difference]: Finished difference Result 211 states and 251 transitions. [2022-02-15 01:43:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 01:43:17,955 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 32 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:43:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:17,956 INFO L225 Difference]: With dead ends: 211 [2022-02-15 01:43:17,957 INFO L226 Difference]: Without dead ends: 167 [2022-02-15 01:43:17,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:43:17,958 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 91 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:17,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 91 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:43:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-15 01:43:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 136. [2022-02-15 01:43:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.21875) internal successors, (156), 129 states have internal predecessors, (156), 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) [2022-02-15 01:43:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2022-02-15 01:43:17,986 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 50 [2022-02-15 01:43:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:17,986 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2022-02-15 01:43:17,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 32 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2022-02-15 01:43:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:43:17,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:17,987 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:17,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:43:17,987 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1512846234, now seen corresponding path program 4 times [2022-02-15 01:43:17,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:17,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287430593] [2022-02-15 01:43:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:18,007 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:18,007 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:18,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:18,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:18,136 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:18,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287430593] [2022-02-15 01:43:18,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287430593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:18,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:18,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:43:18,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742291306] [2022-02-15 01:43:18,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:18,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:43:18,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:18,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:43:18,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:43:18,137 INFO L87 Difference]: Start difference. First operand 136 states and 163 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 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) [2022-02-15 01:43:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:18,263 INFO L93 Difference]: Finished difference Result 244 states and 294 transitions. [2022-02-15 01:43:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:43:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 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) Word has length 53 [2022-02-15 01:43:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:18,264 INFO L225 Difference]: With dead ends: 244 [2022-02-15 01:43:18,264 INFO L226 Difference]: Without dead ends: 192 [2022-02-15 01:43:18,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:43:18,264 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:18,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:18,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-15 01:43:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 159. [2022-02-15 01:43:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 151 states have (on average 1.1986754966887416) internal successors, (181), 152 states have internal predecessors, (181), 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) [2022-02-15 01:43:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 188 transitions. [2022-02-15 01:43:18,325 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 188 transitions. Word has length 53 [2022-02-15 01:43:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:18,325 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 188 transitions. [2022-02-15 01:43:18,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 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) [2022-02-15 01:43:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 188 transitions. [2022-02-15 01:43:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:43:18,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:18,326 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:18,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:43:18,326 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2090772964, now seen corresponding path program 13 times [2022-02-15 01:43:18,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:18,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758141602] [2022-02-15 01:43:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:18,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:18,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:18,397 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:18,444 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:18,484 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:18,484 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:18,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:19,447 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:19,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758141602] [2022-02-15 01:43:19,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758141602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:19,447 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:19,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:43:19,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837500239] [2022-02-15 01:43:19,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:19,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:43:19,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:19,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:43:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:43:19,449 INFO L87 Difference]: Start difference. First operand 159 states and 188 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 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) [2022-02-15 01:43:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:20,319 INFO L93 Difference]: Finished difference Result 260 states and 311 transitions. [2022-02-15 01:43:20,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:43:20,319 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:43:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:20,320 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:43:20,320 INFO L226 Difference]: Without dead ends: 210 [2022-02-15 01:43:20,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=2188, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:43:20,321 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:20,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 108 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1823 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:43:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-15 01:43:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 148. [2022-02-15 01:43:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 140 states have (on average 1.2142857142857142) internal successors, (170), 141 states have internal predecessors, (170), 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) [2022-02-15 01:43:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2022-02-15 01:43:20,354 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 53 [2022-02-15 01:43:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:20,354 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2022-02-15 01:43:20,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 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) [2022-02-15 01:43:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2022-02-15 01:43:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:43:20,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:20,355 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:20,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:43:20,355 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:20,355 INFO L85 PathProgramCache]: Analyzing trace with hash 397140807, now seen corresponding path program 14 times [2022-02-15 01:43:20,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:20,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55648522] [2022-02-15 01:43:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:20,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:20,431 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:20,431 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:20,454 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:20,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:20,502 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:20,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:20,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:21,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:21,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55648522] [2022-02-15 01:43:21,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [55648522] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:21,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:21,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:43:21,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889069161] [2022-02-15 01:43:21,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:21,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:43:21,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:21,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:43:21,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:43:21,096 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 36 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:22,093 INFO L93 Difference]: Finished difference Result 273 states and 327 transitions. [2022-02-15 01:43:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:43:22,115 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 36 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:43:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:22,117 INFO L225 Difference]: With dead ends: 273 [2022-02-15 01:43:22,117 INFO L226 Difference]: Without dead ends: 223 [2022-02-15 01:43:22,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=265, Invalid=2815, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:43:22,118 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:22,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 121 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:43:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-15 01:43:22,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 165. [2022-02-15 01:43:22,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 157 states have (on average 1.2038216560509554) internal successors, (189), 158 states have internal predecessors, (189), 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) [2022-02-15 01:43:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 196 transitions. [2022-02-15 01:43:22,161 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 196 transitions. Word has length 56 [2022-02-15 01:43:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:22,161 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 196 transitions. [2022-02-15 01:43:22,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 36 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 196 transitions. [2022-02-15 01:43:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:43:22,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:22,161 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:22,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:43:22,162 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:22,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash -34619070, now seen corresponding path program 5 times [2022-02-15 01:43:22,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:22,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749292350] [2022-02-15 01:43:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:22,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:22,174 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:22,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:22,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:22,338 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:22,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749292350] [2022-02-15 01:43:22,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749292350] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:22,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:22,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:43:22,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15086548] [2022-02-15 01:43:22,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:22,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:43:22,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:22,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:43:22,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:43:22,339 INFO L87 Difference]: Start difference. First operand 165 states and 196 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 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) [2022-02-15 01:43:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:22,491 INFO L93 Difference]: Finished difference Result 287 states and 343 transitions. [2022-02-15 01:43:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:43:22,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 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) Word has length 59 [2022-02-15 01:43:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:22,493 INFO L225 Difference]: With dead ends: 287 [2022-02-15 01:43:22,493 INFO L226 Difference]: Without dead ends: 229 [2022-02-15 01:43:22,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:43:22,494 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:22,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 42 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-15 01:43:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 191. [2022-02-15 01:43:22,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 183 states have (on average 1.185792349726776) internal successors, (217), 184 states have internal predecessors, (217), 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) [2022-02-15 01:43:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 224 transitions. [2022-02-15 01:43:22,567 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 224 transitions. Word has length 59 [2022-02-15 01:43:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:22,567 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 224 transitions. [2022-02-15 01:43:22,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 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) [2022-02-15 01:43:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 224 transitions. [2022-02-15 01:43:22,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:43:22,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:22,568 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:22,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:43:22,568 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:22,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1617622268, now seen corresponding path program 15 times [2022-02-15 01:43:22,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:22,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911950968] [2022-02-15 01:43:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:22,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:22,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:22,655 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:22,701 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:22,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:22,775 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:22,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:22,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:23,612 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:23,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911950968] [2022-02-15 01:43:23,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911950968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:23,613 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:23,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:43:23,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114369657] [2022-02-15 01:43:23,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:23,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:43:23,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:43:23,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:43:23,614 INFO L87 Difference]: Start difference. First operand 191 states and 224 transitions. Second operand has 40 states, 40 states have (on average 1.375) internal successors, (55), 38 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) [2022-02-15 01:43:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:24,864 INFO L93 Difference]: Finished difference Result 284 states and 333 transitions. [2022-02-15 01:43:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 01:43:24,865 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 38 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 [2022-02-15 01:43:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:24,866 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:43:24,866 INFO L226 Difference]: Without dead ends: 228 [2022-02-15 01:43:24,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=281, Invalid=3141, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:43:24,868 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 114 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:24,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 106 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:43:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-15 01:43:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 194. [2022-02-15 01:43:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 186 states have (on average 1.1881720430107527) internal successors, (221), 187 states have internal predecessors, (221), 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) [2022-02-15 01:43:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 228 transitions. [2022-02-15 01:43:24,921 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 228 transitions. Word has length 59 [2022-02-15 01:43:24,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:24,922 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 228 transitions. [2022-02-15 01:43:24,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 38 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) [2022-02-15 01:43:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 228 transitions. [2022-02-15 01:43:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:43:24,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:24,922 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:24,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:43:24,923 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1256427993, now seen corresponding path program 16 times [2022-02-15 01:43:24,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:24,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401585557] [2022-02-15 01:43:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:24,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:25,011 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:25,011 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:25,062 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:25,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:25,102 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:25,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:25,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:26,134 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:26,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401585557] [2022-02-15 01:43:26,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [401585557] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:26,134 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:26,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 01:43:26,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780714215] [2022-02-15 01:43:26,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:26,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 01:43:26,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:26,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 01:43:26,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:43:26,136 INFO L87 Difference]: Start difference. First operand 194 states and 228 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 40 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) [2022-02-15 01:43:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:27,359 INFO L93 Difference]: Finished difference Result 314 states and 373 transitions. [2022-02-15 01:43:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:43:27,364 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 40 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 62 [2022-02-15 01:43:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:27,365 INFO L225 Difference]: With dead ends: 314 [2022-02-15 01:43:27,365 INFO L226 Difference]: Without dead ends: 258 [2022-02-15 01:43:27,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=283, Invalid=3139, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:43:27,367 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:27,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 72 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:43:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-15 01:43:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 180. [2022-02-15 01:43:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 172 states have (on average 1.2034883720930232) internal successors, (207), 173 states have internal predecessors, (207), 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) [2022-02-15 01:43:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2022-02-15 01:43:27,422 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 62 [2022-02-15 01:43:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:27,422 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2022-02-15 01:43:27,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 40 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) [2022-02-15 01:43:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2022-02-15 01:43:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:43:27,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:27,422 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:27,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:43:27,423 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:27,423 INFO L85 PathProgramCache]: Analyzing trace with hash 696503590, now seen corresponding path program 6 times [2022-02-15 01:43:27,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:27,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853710128] [2022-02-15 01:43:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:27,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:27,440 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:27,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:27,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:27,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:27,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853710128] [2022-02-15 01:43:27,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [853710128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:27,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:27,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:43:27,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261982892] [2022-02-15 01:43:27,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:27,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:43:27,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:43:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:43:27,671 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 2 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) [2022-02-15 01:43:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:27,855 INFO L93 Difference]: Finished difference Result 330 states and 391 transitions. [2022-02-15 01:43:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:43:27,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 2 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) Word has length 65 [2022-02-15 01:43:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:27,857 INFO L225 Difference]: With dead ends: 330 [2022-02-15 01:43:27,857 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:43:27,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:43:27,857 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:27,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 38 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:43:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 206. [2022-02-15 01:43:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 198 states have (on average 1.1868686868686869) internal successors, (235), 199 states have internal predecessors, (235), 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) [2022-02-15 01:43:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 242 transitions. [2022-02-15 01:43:27,930 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 242 transitions. Word has length 65 [2022-02-15 01:43:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:27,930 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 242 transitions. [2022-02-15 01:43:27,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 2 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) [2022-02-15 01:43:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 242 transitions. [2022-02-15 01:43:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:43:27,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:27,931 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:27,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:43:27,932 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:27,932 INFO L85 PathProgramCache]: Analyzing trace with hash 189142052, now seen corresponding path program 17 times [2022-02-15 01:43:27,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:27,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255678148] [2022-02-15 01:43:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:27,984 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:28,029 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:28,029 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:28,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:28,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:28,121 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:28,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:29,198 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:29,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255678148] [2022-02-15 01:43:29,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255678148] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:29,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:29,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:43:29,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002636547] [2022-02-15 01:43:29,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:29,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:43:29,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:29,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:43:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1935, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:43:29,200 INFO L87 Difference]: Start difference. First operand 206 states and 242 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 42 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:30,395 INFO L93 Difference]: Finished difference Result 344 states and 406 transitions. [2022-02-15 01:43:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:43:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 42 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:43:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:30,397 INFO L225 Difference]: With dead ends: 344 [2022-02-15 01:43:30,397 INFO L226 Difference]: Without dead ends: 282 [2022-02-15 01:43:30,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=3218, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:43:30,398 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:30,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 83 Invalid, 2280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:43:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-15 01:43:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 209. [2022-02-15 01:43:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 201 states have (on average 1.1840796019900497) internal successors, (238), 202 states have internal predecessors, (238), 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) [2022-02-15 01:43:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 245 transitions. [2022-02-15 01:43:30,466 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 245 transitions. Word has length 65 [2022-02-15 01:43:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:30,467 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 245 transitions. [2022-02-15 01:43:30,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 42 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 245 transitions. [2022-02-15 01:43:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:43:30,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:30,467 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:30,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:43:30,468 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash 574040296, now seen corresponding path program 18 times [2022-02-15 01:43:30,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:30,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217415821] [2022-02-15 01:43:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:30,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:30,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:30,544 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:30,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:30,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:30,620 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:30,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:31,831 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:31,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217415821] [2022-02-15 01:43:31,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [217415821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:31,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:31,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 01:43:31,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907757007] [2022-02-15 01:43:31,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:31,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 01:43:31,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:31,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 01:43:31,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:43:31,833 INFO L87 Difference]: Start difference. First operand 209 states and 245 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 43 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:33,581 INFO L93 Difference]: Finished difference Result 353 states and 416 transitions. [2022-02-15 01:43:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 01:43:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 43 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:43:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:33,584 INFO L225 Difference]: With dead ends: 353 [2022-02-15 01:43:33,584 INFO L226 Difference]: Without dead ends: 291 [2022-02-15 01:43:33,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=402, Invalid=4290, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:43:33,587 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 3400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:33,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 201 Invalid, 3400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:43:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-15 01:43:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 209. [2022-02-15 01:43:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 201 states have (on average 1.1890547263681592) internal successors, (239), 202 states have internal predecessors, (239), 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) [2022-02-15 01:43:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2022-02-15 01:43:33,660 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 65 [2022-02-15 01:43:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:33,660 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2022-02-15 01:43:33,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 43 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2022-02-15 01:43:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:43:33,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:33,661 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:33,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:43:33,661 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash -470724345, now seen corresponding path program 19 times [2022-02-15 01:43:33,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:33,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393225241] [2022-02-15 01:43:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:33,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:33,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:33,744 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:33,787 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:33,815 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:33,815 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:33,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:33,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:34,641 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:34,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393225241] [2022-02-15 01:43:34,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [393225241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:34,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:34,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 01:43:34,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760741399] [2022-02-15 01:43:34,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:34,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 01:43:34,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 01:43:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1973, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:43:34,643 INFO L87 Difference]: Start difference. First operand 209 states and 246 transitions. Second operand has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 44 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:36,291 INFO L93 Difference]: Finished difference Result 362 states and 428 transitions. [2022-02-15 01:43:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 01:43:36,292 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 44 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:43:36,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:36,293 INFO L225 Difference]: With dead ends: 362 [2022-02-15 01:43:36,293 INFO L226 Difference]: Without dead ends: 300 [2022-02-15 01:43:36,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=330, Invalid=4226, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:43:36,295 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3718 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:36,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 193 Invalid, 3804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3718 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:43:36,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-15 01:43:36,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 232. [2022-02-15 01:43:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 224 states have (on average 1.1785714285714286) internal successors, (264), 225 states have internal predecessors, (264), 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) [2022-02-15 01:43:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 271 transitions. [2022-02-15 01:43:36,511 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 271 transitions. Word has length 68 [2022-02-15 01:43:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:36,511 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 271 transitions. [2022-02-15 01:43:36,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 44 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 271 transitions. [2022-02-15 01:43:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:43:36,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:36,512 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:36,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:43:36,512 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:36,513 INFO L85 PathProgramCache]: Analyzing trace with hash 332420354, now seen corresponding path program 7 times [2022-02-15 01:43:36,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:36,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298849102] [2022-02-15 01:43:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:36,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:36,533 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:36,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:36,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:36,798 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:36,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298849102] [2022-02-15 01:43:36,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [298849102] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:36,799 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:36,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:43:36,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921481353] [2022-02-15 01:43:36,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:36,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:43:36,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:43:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:43:36,800 INFO L87 Difference]: Start difference. First operand 232 states and 271 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 2 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) [2022-02-15 01:43:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:37,047 INFO L93 Difference]: Finished difference Result 382 states and 450 transitions. [2022-02-15 01:43:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:43:37,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 2 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) Word has length 71 [2022-02-15 01:43:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:37,063 INFO L225 Difference]: With dead ends: 382 [2022-02-15 01:43:37,063 INFO L226 Difference]: Without dead ends: 312 [2022-02-15 01:43:37,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:43:37,064 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:37,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 42 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-15 01:43:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 264. [2022-02-15 01:43:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 256 states have (on average 1.1640625) internal successors, (298), 257 states have internal predecessors, (298), 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) [2022-02-15 01:43:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 305 transitions. [2022-02-15 01:43:37,181 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 305 transitions. Word has length 71 [2022-02-15 01:43:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:37,182 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 305 transitions. [2022-02-15 01:43:37,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 2 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) [2022-02-15 01:43:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 305 transitions. [2022-02-15 01:43:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:43:37,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:37,182 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:37,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:43:37,183 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash -485243580, now seen corresponding path program 20 times [2022-02-15 01:43:37,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:37,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797482527] [2022-02-15 01:43:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:37,240 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:37,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:37,278 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:37,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:37,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:37,355 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:37,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:37,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:38,304 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:38,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797482527] [2022-02-15 01:43:38,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1797482527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:38,304 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:38,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 01:43:38,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603090254] [2022-02-15 01:43:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:38,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 01:43:38,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 01:43:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2155, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:43:38,305 INFO L87 Difference]: Start difference. First operand 264 states and 305 transitions. Second operand has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 46 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:40,010 INFO L93 Difference]: Finished difference Result 373 states and 432 transitions. [2022-02-15 01:43:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 01:43:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 46 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:43:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:40,011 INFO L225 Difference]: With dead ends: 373 [2022-02-15 01:43:40,012 INFO L226 Difference]: Without dead ends: 305 [2022-02-15 01:43:40,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=345, Invalid=4625, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:43:40,016 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 132 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4109 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 4197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:40,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 143 Invalid, 4197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4109 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:43:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-15 01:43:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 267. [2022-02-15 01:43:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 259 states have (on average 1.166023166023166) internal successors, (302), 260 states have internal predecessors, (302), 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) [2022-02-15 01:43:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 309 transitions. [2022-02-15 01:43:40,142 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 309 transitions. Word has length 71 [2022-02-15 01:43:40,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:40,142 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 309 transitions. [2022-02-15 01:43:40,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 46 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:40,142 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 309 transitions. [2022-02-15 01:43:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:43:40,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:40,143 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:40,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:43:40,143 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:40,143 INFO L85 PathProgramCache]: Analyzing trace with hash 763923431, now seen corresponding path program 21 times [2022-02-15 01:43:40,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:40,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572589059] [2022-02-15 01:43:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:40,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:40,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:40,236 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:40,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:40,323 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:40,323 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:40,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:40,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:41,541 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:41,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572589059] [2022-02-15 01:43:41,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [572589059] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:41,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:41,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:43:41,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059731816] [2022-02-15 01:43:41,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:41,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:43:41,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:41,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:43:41,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2343, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:43:41,543 INFO L87 Difference]: Start difference. First operand 267 states and 309 transitions. Second operand has 50 states, 50 states have (on average 1.4) internal successors, (70), 48 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:43,410 INFO L93 Difference]: Finished difference Result 377 states and 437 transitions. [2022-02-15 01:43:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 01:43:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 48 states have internal predecessors, (70), 2 states have call successors, (3), 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 74 [2022-02-15 01:43:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:43,411 INFO L225 Difference]: With dead ends: 377 [2022-02-15 01:43:43,411 INFO L226 Difference]: Without dead ends: 309 [2022-02-15 01:43:43,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=362, Invalid=5040, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:43:43,412 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 148 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 3754 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:43,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 96 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3754 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:43:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-15 01:43:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 270. [2022-02-15 01:43:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 262 states have (on average 1.16793893129771) internal successors, (306), 263 states have internal predecessors, (306), 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) [2022-02-15 01:43:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 313 transitions. [2022-02-15 01:43:43,534 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 313 transitions. Word has length 74 [2022-02-15 01:43:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:43,534 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 313 transitions. [2022-02-15 01:43:43,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 48 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 313 transitions. [2022-02-15 01:43:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:43:43,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:43,535 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:43,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:43:43,536 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1073450470, now seen corresponding path program 8 times [2022-02-15 01:43:43,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:43,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324823917] [2022-02-15 01:43:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:43,561 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:43,562 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:43,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:43,841 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:43,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324823917] [2022-02-15 01:43:43,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324823917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:43,841 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:43,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:43:43,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851518887] [2022-02-15 01:43:43,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:43,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:43:43,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:43,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:43:43,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:43:43,842 INFO L87 Difference]: Start difference. First operand 270 states and 313 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 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) [2022-02-15 01:43:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:44,164 INFO L93 Difference]: Finished difference Result 434 states and 508 transitions. [2022-02-15 01:43:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:43:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 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) Word has length 77 [2022-02-15 01:43:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:44,165 INFO L225 Difference]: With dead ends: 434 [2022-02-15 01:43:44,165 INFO L226 Difference]: Without dead ends: 358 [2022-02-15 01:43:44,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:43:44,166 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:44,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 58 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:43:44,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-15 01:43:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 305. [2022-02-15 01:43:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 297 states have (on average 1.1548821548821548) internal successors, (343), 298 states have internal predecessors, (343), 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) [2022-02-15 01:43:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 350 transitions. [2022-02-15 01:43:44,298 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 350 transitions. Word has length 77 [2022-02-15 01:43:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:44,299 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 350 transitions. [2022-02-15 01:43:44,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 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) [2022-02-15 01:43:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 350 transitions. [2022-02-15 01:43:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:43:44,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:44,299 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:44,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:43:44,300 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1193271708, now seen corresponding path program 22 times [2022-02-15 01:43:44,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:44,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284277379] [2022-02-15 01:43:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:44,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:44,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:44,365 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:44,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:44,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:44,433 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:44,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:44,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:46,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:46,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284277379] [2022-02-15 01:43:46,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284277379] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:46,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:46,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 01:43:46,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617073895] [2022-02-15 01:43:46,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:46,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 01:43:46,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 01:43:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2699, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:43:46,074 INFO L87 Difference]: Start difference. First operand 305 states and 350 transitions. Second operand has 52 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 50 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:47,901 INFO L93 Difference]: Finished difference Result 446 states and 521 transitions. [2022-02-15 01:43:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:43:47,902 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 50 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:43:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:47,903 INFO L225 Difference]: With dead ends: 446 [2022-02-15 01:43:47,903 INFO L226 Difference]: Without dead ends: 372 [2022-02-15 01:43:47,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=382, Invalid=4448, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:43:47,904 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 78 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 3686 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:47,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 163 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3686 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:43:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-15 01:43:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 282. [2022-02-15 01:43:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 274 states have (on average 1.167883211678832) internal successors, (320), 275 states have internal predecessors, (320), 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) [2022-02-15 01:43:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 327 transitions. [2022-02-15 01:43:48,038 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 327 transitions. Word has length 77 [2022-02-15 01:43:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:48,038 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 327 transitions. [2022-02-15 01:43:48,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 50 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 327 transitions. [2022-02-15 01:43:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:43:48,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:48,039 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:48,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:43:48,039 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:48,039 INFO L85 PathProgramCache]: Analyzing trace with hash 482352839, now seen corresponding path program 23 times [2022-02-15 01:43:48,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:48,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961121357] [2022-02-15 01:43:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:48,075 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:48,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:48,102 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:48,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:48,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:48,163 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:48,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:48,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:49,078 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:49,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961121357] [2022-02-15 01:43:49,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [961121357] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:49,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:49,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 01:43:49,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374697616] [2022-02-15 01:43:49,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:49,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 01:43:49,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 01:43:49,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2746, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:43:49,080 INFO L87 Difference]: Start difference. First operand 282 states and 327 transitions. Second operand has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 52 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:50,966 INFO L93 Difference]: Finished difference Result 463 states and 541 transitions. [2022-02-15 01:43:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 01:43:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 52 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:43:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:50,984 INFO L225 Difference]: With dead ends: 463 [2022-02-15 01:43:50,984 INFO L226 Difference]: Without dead ends: 389 [2022-02-15 01:43:50,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=393, Invalid=5927, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:43:50,985 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 163 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3901 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:50,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 64 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3901 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:43:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-15 01:43:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 311. [2022-02-15 01:43:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 303 states have (on average 1.1584158415841583) internal successors, (351), 304 states have internal predecessors, (351), 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) [2022-02-15 01:43:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 358 transitions. [2022-02-15 01:43:51,132 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 358 transitions. Word has length 80 [2022-02-15 01:43:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:51,133 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 358 transitions. [2022-02-15 01:43:51,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 52 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 358 transitions. [2022-02-15 01:43:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:51,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:51,133 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:51,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:43:51,134 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:51,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:51,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1052928194, now seen corresponding path program 9 times [2022-02-15 01:43:51,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:51,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428254457] [2022-02-15 01:43:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:51,149 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:51,149 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:43:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:51,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:51,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:51,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428254457] [2022-02-15 01:43:51,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1428254457] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:51,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:51,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:43:51,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321374363] [2022-02-15 01:43:51,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:51,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:43:51,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:51,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:43:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:43:51,452 INFO L87 Difference]: Start difference. First operand 311 states and 358 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 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) [2022-02-15 01:43:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:51,840 INFO L93 Difference]: Finished difference Result 489 states and 569 transitions. [2022-02-15 01:43:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:43:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 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) Word has length 83 [2022-02-15 01:43:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:51,842 INFO L225 Difference]: With dead ends: 489 [2022-02-15 01:43:51,842 INFO L226 Difference]: Without dead ends: 407 [2022-02-15 01:43:51,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:43:51,843 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:51,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 47 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:43:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-15 01:43:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 349. [2022-02-15 01:43:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 341 states have (on average 1.1466275659824048) internal successors, (391), 342 states have internal predecessors, (391), 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) [2022-02-15 01:43:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 398 transitions. [2022-02-15 01:43:52,015 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 398 transitions. Word has length 83 [2022-02-15 01:43:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:52,016 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 398 transitions. [2022-02-15 01:43:52,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 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) [2022-02-15 01:43:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 398 transitions. [2022-02-15 01:43:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:52,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:52,016 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:52,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:43:52,017 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1391648892, now seen corresponding path program 24 times [2022-02-15 01:43:52,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:52,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122244225] [2022-02-15 01:43:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:52,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:52,097 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:52,098 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:52,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:52,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:52,193 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:52,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:52,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:53,674 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:53,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122244225] [2022-02-15 01:43:53,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [122244225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:53,674 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:53,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:43:53,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518797666] [2022-02-15 01:43:53,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:53,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:43:53,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:53,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:43:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3066, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:43:53,683 INFO L87 Difference]: Start difference. First operand 349 states and 398 transitions. Second operand has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 54 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:55,618 INFO L93 Difference]: Finished difference Result 500 states and 581 transitions. [2022-02-15 01:43:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 01:43:55,619 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 54 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:55,620 INFO L225 Difference]: With dead ends: 500 [2022-02-15 01:43:55,620 INFO L226 Difference]: Without dead ends: 420 [2022-02-15 01:43:55,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=5056, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:43:55,621 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 4374 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 4422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:55,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 173 Invalid, 4422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 4374 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:43:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-15 01:43:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 323. [2022-02-15 01:43:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 315 states have (on average 1.1587301587301588) internal successors, (365), 316 states have internal predecessors, (365), 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) [2022-02-15 01:43:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 372 transitions. [2022-02-15 01:43:55,802 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 372 transitions. Word has length 83 [2022-02-15 01:43:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:55,802 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 372 transitions. [2022-02-15 01:43:55,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 54 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 372 transitions. [2022-02-15 01:43:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:43:55,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:55,803 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:55,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:43:55,803 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash 502663591, now seen corresponding path program 25 times [2022-02-15 01:43:55,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:55,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796896119] [2022-02-15 01:43:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:55,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:55,908 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:55,908 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:55,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:55,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:55,995 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:55,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:56,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:57,702 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:57,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796896119] [2022-02-15 01:43:57,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1796896119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:57,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:57,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-15 01:43:57,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286270856] [2022-02-15 01:43:57,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:57,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 01:43:57,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 01:43:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3356, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:43:57,704 INFO L87 Difference]: Start difference. First operand 323 states and 372 transitions. Second operand has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 56 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:59,752 INFO L93 Difference]: Finished difference Result 504 states and 586 transitions. [2022-02-15 01:43:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 01:43:59,752 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 56 states have internal predecessors, (82), 2 states have call successors, (3), 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 86 [2022-02-15 01:43:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:59,753 INFO L225 Difference]: With dead ends: 504 [2022-02-15 01:43:59,753 INFO L226 Difference]: Without dead ends: 424 [2022-02-15 01:43:59,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=431, Invalid=5575, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:43:59,754 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4351 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 4402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:59,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 163 Invalid, 4402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 4351 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:43:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-02-15 01:43:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 326. [2022-02-15 01:43:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 318 states have (on average 1.1572327044025157) internal successors, (368), 319 states have internal predecessors, (368), 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) [2022-02-15 01:43:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 375 transitions. [2022-02-15 01:43:59,943 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 375 transitions. Word has length 86 [2022-02-15 01:43:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:59,943 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 375 transitions. [2022-02-15 01:43:59,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 56 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 375 transitions. [2022-02-15 01:43:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:43:59,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:59,944 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:59,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:43:59,944 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:59,944 INFO L85 PathProgramCache]: Analyzing trace with hash -392407197, now seen corresponding path program 26 times [2022-02-15 01:43:59,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:59,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187638768] [2022-02-15 01:43:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:59,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:00,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:00,034 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:00,067 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:00,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:00,104 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:00,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:00,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:01,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:01,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187638768] [2022-02-15 01:44:01,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1187638768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:01,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:01,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:44:01,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070581449] [2022-02-15 01:44:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:01,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:44:01,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:44:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3286, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:44:01,444 INFO L87 Difference]: Start difference. First operand 326 states and 375 transitions. Second operand has 59 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 57 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:04,108 INFO L93 Difference]: Finished difference Result 520 states and 604 transitions. [2022-02-15 01:44:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 01:44:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 57 states have internal predecessors, (82), 2 states have call successors, (3), 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 86 [2022-02-15 01:44:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:04,111 INFO L225 Difference]: With dead ends: 520 [2022-02-15 01:44:04,112 INFO L226 Difference]: Without dead ends: 440 [2022-02-15 01:44:04,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=477, Invalid=7355, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 01:44:04,113 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 138 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5058 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 5168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 5058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:04,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 163 Invalid, 5168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 5058 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:44:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-15 01:44:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 326. [2022-02-15 01:44:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 318 states have (on average 1.1603773584905661) internal successors, (369), 319 states have internal predecessors, (369), 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) [2022-02-15 01:44:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 376 transitions. [2022-02-15 01:44:04,362 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 376 transitions. Word has length 86 [2022-02-15 01:44:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:04,362 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 376 transitions. [2022-02-15 01:44:04,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 57 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:04,363 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 376 transitions. [2022-02-15 01:44:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:44:04,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:04,365 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:04,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:44:04,365 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash -973926746, now seen corresponding path program 10 times [2022-02-15 01:44:04,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:04,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917231788] [2022-02-15 01:44:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:04,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:04,383 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:44:04,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:04,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:04,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:04,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917231788] [2022-02-15 01:44:04,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [917231788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:04,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:04,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:44:04,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172144049] [2022-02-15 01:44:04,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:04,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:44:04,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:04,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:44:04,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:44:04,701 INFO L87 Difference]: Start difference. First operand 326 states and 376 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 2 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) [2022-02-15 01:44:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:05,130 INFO L93 Difference]: Finished difference Result 544 states and 629 transitions. [2022-02-15 01:44:05,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:44:05,131 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 2 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) Word has length 89 [2022-02-15 01:44:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:05,132 INFO L225 Difference]: With dead ends: 544 [2022-02-15 01:44:05,132 INFO L226 Difference]: Without dead ends: 456 [2022-02-15 01:44:05,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:44:05,135 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 83 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:05,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 32 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:44:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-02-15 01:44:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 364. [2022-02-15 01:44:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 356 states have (on average 1.148876404494382) internal successors, (409), 357 states have internal predecessors, (409), 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) [2022-02-15 01:44:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 416 transitions. [2022-02-15 01:44:05,385 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 416 transitions. Word has length 89 [2022-02-15 01:44:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:05,385 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 416 transitions. [2022-02-15 01:44:05,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 2 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) [2022-02-15 01:44:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 416 transitions. [2022-02-15 01:44:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:44:05,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:05,386 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:05,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:44:05,387 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:05,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1904424796, now seen corresponding path program 27 times [2022-02-15 01:44:05,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:05,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818666246] [2022-02-15 01:44:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:05,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:05,473 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:05,474 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:05,511 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:05,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:05,550 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:05,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:07,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:07,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818666246] [2022-02-15 01:44:07,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [818666246] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:07,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:07,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-15 01:44:07,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419890784] [2022-02-15 01:44:07,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:07,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 01:44:07,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 01:44:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=3591, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:44:07,277 INFO L87 Difference]: Start difference. First operand 364 states and 416 transitions. Second operand has 60 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:09,486 INFO L93 Difference]: Finished difference Result 554 states and 640 transitions. [2022-02-15 01:44:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 01:44:09,486 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2022-02-15 01:44:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:09,487 INFO L225 Difference]: With dead ends: 554 [2022-02-15 01:44:09,487 INFO L226 Difference]: Without dead ends: 468 [2022-02-15 01:44:09,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=442, Invalid=5878, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:44:09,488 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 4849 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 4900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:09,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 183 Invalid, 4900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 4849 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:44:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-02-15 01:44:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 367. [2022-02-15 01:44:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 359 states have (on average 1.1476323119777159) internal successors, (412), 360 states have internal predecessors, (412), 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) [2022-02-15 01:44:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 419 transitions. [2022-02-15 01:44:09,717 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 419 transitions. Word has length 89 [2022-02-15 01:44:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:09,717 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 419 transitions. [2022-02-15 01:44:09,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 419 transitions. [2022-02-15 01:44:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:44:09,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:09,718 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:09,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:44:09,718 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash 493670760, now seen corresponding path program 28 times [2022-02-15 01:44:09,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:09,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953705020] [2022-02-15 01:44:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:09,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:09,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:09,786 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:09,823 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:09,863 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:09,863 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:09,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:09,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:11,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:11,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953705020] [2022-02-15 01:44:11,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [953705020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:11,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:11,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-15 01:44:11,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745836682] [2022-02-15 01:44:11,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:11,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-15 01:44:11,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-15 01:44:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3519, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:44:11,277 INFO L87 Difference]: Start difference. First operand 367 states and 419 transitions. Second operand has 61 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 59 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:14,336 INFO L93 Difference]: Finished difference Result 571 states and 659 transitions. [2022-02-15 01:44:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 01:44:14,336 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 59 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2022-02-15 01:44:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:14,338 INFO L225 Difference]: With dead ends: 571 [2022-02-15 01:44:14,338 INFO L226 Difference]: Without dead ends: 485 [2022-02-15 01:44:14,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=494, Invalid=7878, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 01:44:14,366 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5624 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 5737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 5624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:14,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 193 Invalid, 5737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 5624 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:44:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-15 01:44:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 367. [2022-02-15 01:44:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 359 states have (on average 1.15041782729805) internal successors, (413), 360 states have internal predecessors, (413), 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) [2022-02-15 01:44:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 420 transitions. [2022-02-15 01:44:14,683 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 420 transitions. Word has length 89 [2022-02-15 01:44:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:14,683 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 420 transitions. [2022-02-15 01:44:14,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 59 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 420 transitions. [2022-02-15 01:44:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:44:14,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:14,684 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:14,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:44:14,684 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1594379399, now seen corresponding path program 29 times [2022-02-15 01:44:14,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:14,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390806076] [2022-02-15 01:44:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:14,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:14,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:14,754 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:14,795 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:14,828 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:14,828 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:14,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:16,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:16,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390806076] [2022-02-15 01:44:16,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [390806076] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:16,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:16,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:44:16,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949816372] [2022-02-15 01:44:16,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:16,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:44:16,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:16,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:44:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3646, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:44:16,566 INFO L87 Difference]: Start difference. First operand 367 states and 420 transitions. Second operand has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 60 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:19,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:19,706 INFO L93 Difference]: Finished difference Result 576 states and 666 transitions. [2022-02-15 01:44:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-15 01:44:19,706 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 60 states have internal predecessors, (88), 2 states have call successors, (3), 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 92 [2022-02-15 01:44:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:19,707 INFO L225 Difference]: With dead ends: 576 [2022-02-15 01:44:19,707 INFO L226 Difference]: Without dead ends: 490 [2022-02-15 01:44:19,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=457, Invalid=7915, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 01:44:19,708 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 123 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 6724 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 6842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 6724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:19,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 275 Invalid, 6842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 6724 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:44:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-02-15 01:44:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 402. [2022-02-15 01:44:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 394 states have (on average 1.1421319796954315) internal successors, (450), 395 states have internal predecessors, (450), 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) [2022-02-15 01:44:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 457 transitions. [2022-02-15 01:44:20,011 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 457 transitions. Word has length 92 [2022-02-15 01:44:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:20,011 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 457 transitions. [2022-02-15 01:44:20,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 60 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 457 transitions. [2022-02-15 01:44:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:44:20,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:20,012 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:20,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:44:20,013 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:20,013 INFO L85 PathProgramCache]: Analyzing trace with hash 657325186, now seen corresponding path program 11 times [2022-02-15 01:44:20,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:20,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438781145] [2022-02-15 01:44:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:20,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:20,027 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:44:20,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:20,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:20,420 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:20,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438781145] [2022-02-15 01:44:20,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438781145] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:20,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:20,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:44:20,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39373089] [2022-02-15 01:44:20,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:20,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:44:20,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:44:20,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:44:20,421 INFO L87 Difference]: Start difference. First operand 402 states and 457 transitions. Second operand has 30 states, 30 states have (on average 2.9) internal successors, (87), 29 states have internal predecessors, (87), 2 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) [2022-02-15 01:44:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:20,980 INFO L93 Difference]: Finished difference Result 608 states and 700 transitions. [2022-02-15 01:44:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:44:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 29 states have internal predecessors, (87), 2 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) Word has length 95 [2022-02-15 01:44:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:20,982 INFO L225 Difference]: With dead ends: 608 [2022-02-15 01:44:20,982 INFO L226 Difference]: Without dead ends: 514 [2022-02-15 01:44:20,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 19 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:44:20,983 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:20,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 32 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:44:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-15 01:44:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 446. [2022-02-15 01:44:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 438 states have (on average 1.1324200913242009) internal successors, (496), 439 states have internal predecessors, (496), 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) [2022-02-15 01:44:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 503 transitions. [2022-02-15 01:44:21,302 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 503 transitions. Word has length 95 [2022-02-15 01:44:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:21,302 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 503 transitions. [2022-02-15 01:44:21,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 29 states have internal predecessors, (87), 2 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) [2022-02-15 01:44:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 503 transitions. [2022-02-15 01:44:21,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:44:21,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:21,304 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:21,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:44:21,304 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:21,305 INFO L85 PathProgramCache]: Analyzing trace with hash -91153980, now seen corresponding path program 30 times [2022-02-15 01:44:21,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:21,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539405079] [2022-02-15 01:44:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:21,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:21,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:21,384 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:21,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:21,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:21,470 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:21,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:21,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:23,309 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:23,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539405079] [2022-02-15 01:44:23,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539405079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:23,309 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:23,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-15 01:44:23,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607602906] [2022-02-15 01:44:23,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:23,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-15 01:44:23,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:23,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-15 01:44:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=3891, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:44:23,311 INFO L87 Difference]: Start difference. First operand 446 states and 503 transitions. Second operand has 64 states, 64 states have (on average 1.421875) internal successors, (91), 62 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:26,644 INFO L93 Difference]: Finished difference Result 587 states and 666 transitions. [2022-02-15 01:44:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 01:44:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.421875) internal successors, (91), 62 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2022-02-15 01:44:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:26,646 INFO L225 Difference]: With dead ends: 587 [2022-02-15 01:44:26,646 INFO L226 Difference]: Without dead ends: 495 [2022-02-15 01:44:26,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=473, Invalid=8457, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:44:26,649 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 7148 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 7270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 7148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:26,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 251 Invalid, 7270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 7148 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:44:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-15 01:44:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 449. [2022-02-15 01:44:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 441 states have (on average 1.1337868480725624) internal successors, (500), 442 states have internal predecessors, (500), 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) [2022-02-15 01:44:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 507 transitions. [2022-02-15 01:44:27,056 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 507 transitions. Word has length 95 [2022-02-15 01:44:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:27,056 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 507 transitions. [2022-02-15 01:44:27,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.421875) internal successors, (91), 62 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 507 transitions. [2022-02-15 01:44:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-15 01:44:27,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:27,057 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:27,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:44:27,057 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:27,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1353390233, now seen corresponding path program 31 times [2022-02-15 01:44:27,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:27,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447848571] [2022-02-15 01:44:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:27,108 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:27,142 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:27,142 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:27,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:27,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:27,231 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:27,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:27,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:28,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:28,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447848571] [2022-02-15 01:44:28,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447848571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:28,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:28,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-15 01:44:28,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818942915] [2022-02-15 01:44:28,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:28,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-15 01:44:28,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-15 01:44:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=4144, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:44:28,901 INFO L87 Difference]: Start difference. First operand 449 states and 507 transitions. Second operand has 66 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 64 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:32,522 INFO L93 Difference]: Finished difference Result 591 states and 671 transitions. [2022-02-15 01:44:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 01:44:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 64 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-02-15 01:44:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:32,524 INFO L225 Difference]: With dead ends: 591 [2022-02-15 01:44:32,524 INFO L226 Difference]: Without dead ends: 499 [2022-02-15 01:44:32,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=489, Invalid=9017, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 01:44:32,526 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 143 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 7438 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 7562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 7438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:32,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 223 Invalid, 7562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 7438 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 01:44:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-02-15 01:44:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 452. [2022-02-15 01:44:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 444 states have (on average 1.135135135135135) internal successors, (504), 445 states have internal predecessors, (504), 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) [2022-02-15 01:44:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 511 transitions. [2022-02-15 01:44:32,863 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 511 transitions. Word has length 98 [2022-02-15 01:44:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:32,863 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 511 transitions. [2022-02-15 01:44:32,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 64 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 511 transitions. [2022-02-15 01:44:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 01:44:32,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:32,864 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:32,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:44:32,865 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash 572673894, now seen corresponding path program 12 times [2022-02-15 01:44:32,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:32,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122123832] [2022-02-15 01:44:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:32,884 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:32,884 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:44:32,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:32,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:33,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:33,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122123832] [2022-02-15 01:44:33,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122123832] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:33,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:33,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:44:33,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899951489] [2022-02-15 01:44:33,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:33,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:44:33,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:33,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:44:33,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:44:33,319 INFO L87 Difference]: Start difference. First operand 452 states and 511 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 31 states have internal predecessors, (93), 2 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) [2022-02-15 01:44:34,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:34,006 INFO L93 Difference]: Finished difference Result 672 states and 770 transitions. [2022-02-15 01:44:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:44:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 31 states have internal predecessors, (93), 2 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) Word has length 101 [2022-02-15 01:44:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:34,008 INFO L225 Difference]: With dead ends: 672 [2022-02-15 01:44:34,008 INFO L226 Difference]: Without dead ends: 572 [2022-02-15 01:44:34,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:44:34,009 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 86 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:34,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 65 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:44:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-02-15 01:44:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 499. [2022-02-15 01:44:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 491 states have (on average 1.1262729124236253) internal successors, (553), 492 states have internal predecessors, (553), 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) [2022-02-15 01:44:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 560 transitions. [2022-02-15 01:44:34,388 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 560 transitions. Word has length 101 [2022-02-15 01:44:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:34,388 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 560 transitions. [2022-02-15 01:44:34,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 31 states have internal predecessors, (93), 2 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) [2022-02-15 01:44:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 560 transitions. [2022-02-15 01:44:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 01:44:34,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:34,389 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:34,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:44:34,389 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:34,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2100040420, now seen corresponding path program 32 times [2022-02-15 01:44:34,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:34,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290047697] [2022-02-15 01:44:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:34,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:34,491 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:34,491 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:34,528 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:34,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:34,568 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:34,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:34,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:36,840 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:36,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290047697] [2022-02-15 01:44:36,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [290047697] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:36,841 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:36,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:44:36,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415320975] [2022-02-15 01:44:36,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:36,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:44:36,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:36,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:44:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=4670, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:44:36,842 INFO L87 Difference]: Start difference. First operand 499 states and 560 transitions. Second operand has 68 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 66 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:39,629 INFO L93 Difference]: Finished difference Result 680 states and 779 transitions. [2022-02-15 01:44:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 01:44:39,629 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 66 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-02-15 01:44:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:39,631 INFO L225 Difference]: With dead ends: 680 [2022-02-15 01:44:39,631 INFO L226 Difference]: Without dead ends: 582 [2022-02-15 01:44:39,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=448, Invalid=7742, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 01:44:39,632 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 5789 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 5850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 5789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:39,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 133 Invalid, 5850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 5789 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:44:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-02-15 01:44:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 464. [2022-02-15 01:44:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 456 states have (on average 1.1359649122807018) internal successors, (518), 457 states have internal predecessors, (518), 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) [2022-02-15 01:44:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 525 transitions. [2022-02-15 01:44:40,009 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 525 transitions. Word has length 101 [2022-02-15 01:44:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:40,009 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 525 transitions. [2022-02-15 01:44:40,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 66 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 525 transitions. [2022-02-15 01:44:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-15 01:44:40,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:40,028 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:40,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:44:40,030 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1606015559, now seen corresponding path program 33 times [2022-02-15 01:44:40,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:40,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95545452] [2022-02-15 01:44:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:40,091 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:40,129 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:40,129 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:40,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:40,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:40,218 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:40,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:40,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:42,390 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:42,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95545452] [2022-02-15 01:44:42,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [95545452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:42,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:42,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 01:44:42,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424922940] [2022-02-15 01:44:42,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:42,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 01:44:42,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:42,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 01:44:42,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=4674, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:44:42,391 INFO L87 Difference]: Start difference. First operand 464 states and 525 transitions. Second operand has 70 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 68 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:46,097 INFO L93 Difference]: Finished difference Result 701 states and 803 transitions. [2022-02-15 01:44:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-15 01:44:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 68 states have internal predecessors, (100), 2 states have call successors, (3), 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 104 [2022-02-15 01:44:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:46,099 INFO L225 Difference]: With dead ends: 701 [2022-02-15 01:44:46,099 INFO L226 Difference]: Without dead ends: 603 [2022-02-15 01:44:46,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=521, Invalid=10191, Unknown=0, NotChecked=0, Total=10712 [2022-02-15 01:44:46,100 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 144 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 7917 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 8052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 7917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:46,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 231 Invalid, 8052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 7917 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 01:44:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-15 01:44:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 505. [2022-02-15 01:44:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 497 states have (on average 1.1287726358148893) internal successors, (561), 498 states have internal predecessors, (561), 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) [2022-02-15 01:44:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 568 transitions. [2022-02-15 01:44:46,510 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 568 transitions. Word has length 104 [2022-02-15 01:44:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:46,510 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 568 transitions. [2022-02-15 01:44:46,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 68 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 568 transitions. [2022-02-15 01:44:46,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-15 01:44:46,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:46,511 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:46,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:44:46,512 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2071662658, now seen corresponding path program 13 times [2022-02-15 01:44:46,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:46,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437693466] [2022-02-15 01:44:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:46,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:46,530 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:44:46,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:46,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:47,008 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:47,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437693466] [2022-02-15 01:44:47,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [437693466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:47,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:47,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:44:47,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178112231] [2022-02-15 01:44:47,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:47,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:44:47,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:44:47,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:44:47,009 INFO L87 Difference]: Start difference. First operand 505 states and 568 transitions. Second operand has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 33 states have internal predecessors, (99), 2 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) [2022-02-15 01:44:47,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:47,823 INFO L93 Difference]: Finished difference Result 739 states and 843 transitions. [2022-02-15 01:44:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:44:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 33 states have internal predecessors, (99), 2 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) Word has length 107 [2022-02-15 01:44:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:47,825 INFO L225 Difference]: With dead ends: 739 [2022-02-15 01:44:47,825 INFO L226 Difference]: Without dead ends: 633 [2022-02-15 01:44:47,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 20 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:44:47,826 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:47,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 81 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:44:47,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-15 01:44:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 555. [2022-02-15 01:44:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 547 states have (on average 1.1206581352833638) internal successors, (613), 548 states have internal predecessors, (613), 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) [2022-02-15 01:44:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 620 transitions. [2022-02-15 01:44:48,303 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 620 transitions. Word has length 107 [2022-02-15 01:44:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:48,303 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 620 transitions. [2022-02-15 01:44:48,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 33 states have internal predecessors, (99), 2 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) [2022-02-15 01:44:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 620 transitions. [2022-02-15 01:44:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-15 01:44:48,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:48,304 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:48,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:44:48,304 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1330662396, now seen corresponding path program 34 times [2022-02-15 01:44:48,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:48,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230311353] [2022-02-15 01:44:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:48,342 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:48,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:48,385 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:48,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:48,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:48,466 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:48,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:50,810 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:50,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230311353] [2022-02-15 01:44:50,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230311353] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:50,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:50,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-15 01:44:50,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215973287] [2022-02-15 01:44:50,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:50,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-15 01:44:50,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-15 01:44:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=5169, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:44:50,812 INFO L87 Difference]: Start difference. First operand 555 states and 620 transitions. Second operand has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 70 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:53,809 INFO L93 Difference]: Finished difference Result 746 states and 851 transitions. [2022-02-15 01:44:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 01:44:53,809 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 70 states have internal predecessors, (103), 2 states have call successors, (3), 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 107 [2022-02-15 01:44:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:53,811 INFO L225 Difference]: With dead ends: 746 [2022-02-15 01:44:53,811 INFO L226 Difference]: Without dead ends: 642 [2022-02-15 01:44:53,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=532, Invalid=8398, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:44:53,812 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 6771 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 6832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 6771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:53,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 243 Invalid, 6832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 6771 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:44:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-15 01:44:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 517. [2022-02-15 01:44:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 509 states have (on average 1.1296660117878192) internal successors, (575), 510 states have internal predecessors, (575), 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) [2022-02-15 01:44:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 582 transitions. [2022-02-15 01:44:54,251 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 582 transitions. Word has length 107 [2022-02-15 01:44:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:54,251 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 582 transitions. [2022-02-15 01:44:54,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 70 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 582 transitions. [2022-02-15 01:44:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-15 01:44:54,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:54,252 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:54,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:44:54,252 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash 580199719, now seen corresponding path program 35 times [2022-02-15 01:44:54,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:54,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117995920] [2022-02-15 01:44:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:54,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:54,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:54,322 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:54,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:54,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:54,419 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:54,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:54,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:57,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:57,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117995920] [2022-02-15 01:44:57,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2117995920] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:57,109 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:57,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:44:57,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582305424] [2022-02-15 01:44:57,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:57,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:44:57,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:44:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=5460, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:44:57,110 INFO L87 Difference]: Start difference. First operand 517 states and 582 transitions. Second operand has 74 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 72 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:00,123 INFO L93 Difference]: Finished difference Result 750 states and 856 transitions. [2022-02-15 01:45:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-15 01:45:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 72 states have internal predecessors, (106), 2 states have call successors, (3), 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 110 [2022-02-15 01:45:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:00,125 INFO L225 Difference]: With dead ends: 750 [2022-02-15 01:45:00,125 INFO L226 Difference]: Without dead ends: 646 [2022-02-15 01:45:00,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=551, Invalid=8955, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 01:45:00,126 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 6953 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 7017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 6953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:00,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 233 Invalid, 7017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 6953 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:45:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-02-15 01:45:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 520. [2022-02-15 01:45:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 512 states have (on average 1.12890625) internal successors, (578), 513 states have internal predecessors, (578), 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) [2022-02-15 01:45:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 585 transitions. [2022-02-15 01:45:00,580 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 585 transitions. Word has length 110 [2022-02-15 01:45:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:00,580 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 585 transitions. [2022-02-15 01:45:00,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 72 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 585 transitions. [2022-02-15 01:45:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-15 01:45:00,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:00,581 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:00,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:45:00,581 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1977417443, now seen corresponding path program 36 times [2022-02-15 01:45:00,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:00,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909007256] [2022-02-15 01:45:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:00,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:00,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:00,640 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:00,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:00,707 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:00,707 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:00,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:00,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:02,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:02,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909007256] [2022-02-15 01:45:02,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [909007256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:02,633 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:02,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-15 01:45:02,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895973763] [2022-02-15 01:45:02,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:02,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-15 01:45:02,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:02,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-15 01:45:02,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=5374, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:45:02,634 INFO L87 Difference]: Start difference. First operand 520 states and 585 transitions. Second operand has 75 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 73 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:07,114 INFO L93 Difference]: Finished difference Result 770 states and 878 transitions. [2022-02-15 01:45:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-15 01:45:07,114 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 73 states have internal predecessors, (106), 2 states have call successors, (3), 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 110 [2022-02-15 01:45:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:07,116 INFO L225 Difference]: With dead ends: 770 [2022-02-15 01:45:07,116 INFO L226 Difference]: Without dead ends: 666 [2022-02-15 01:45:07,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3315 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=613, Invalid=12043, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 01:45:07,118 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 187 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 9059 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 9197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 9059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:07,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 193 Invalid, 9197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 9059 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 01:45:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-02-15 01:45:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 520. [2022-02-15 01:45:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 512 states have (on average 1.130859375) internal successors, (579), 513 states have internal predecessors, (579), 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) [2022-02-15 01:45:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 586 transitions. [2022-02-15 01:45:07,610 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 586 transitions. Word has length 110 [2022-02-15 01:45:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:07,610 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 586 transitions. [2022-02-15 01:45:07,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 73 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 586 transitions. [2022-02-15 01:45:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-15 01:45:07,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:07,611 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 28, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:07,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:45:07,611 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:07,612 INFO L85 PathProgramCache]: Analyzing trace with hash -985575386, now seen corresponding path program 14 times [2022-02-15 01:45:07,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:07,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815089878] [2022-02-15 01:45:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:07,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:07,630 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:45:07,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:07,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:08,044 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:08,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815089878] [2022-02-15 01:45:08,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [815089878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:08,044 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:08,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:45:08,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804379347] [2022-02-15 01:45:08,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:08,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:45:08,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:08,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:45:08,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:45:08,045 INFO L87 Difference]: Start difference. First operand 520 states and 586 transitions. Second operand has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 2 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) [2022-02-15 01:45:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:08,983 INFO L93 Difference]: Finished difference Result 806 states and 915 transitions. [2022-02-15 01:45:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:45:08,984 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 2 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) Word has length 113 [2022-02-15 01:45:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:08,986 INFO L225 Difference]: With dead ends: 806 [2022-02-15 01:45:08,986 INFO L226 Difference]: Without dead ends: 694 [2022-02-15 01:45:08,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 21 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:45:08,987 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:08,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 54 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:45:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-02-15 01:45:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 570. [2022-02-15 01:45:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 562 states have (on average 1.1227758007117439) internal successors, (631), 563 states have internal predecessors, (631), 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) [2022-02-15 01:45:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 638 transitions. [2022-02-15 01:45:09,517 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 638 transitions. Word has length 113 [2022-02-15 01:45:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:09,517 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 638 transitions. [2022-02-15 01:45:09,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 2 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) [2022-02-15 01:45:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 638 transitions. [2022-02-15 01:45:09,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-15 01:45:09,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:09,518 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:09,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:45:09,519 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:09,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:09,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1576926500, now seen corresponding path program 37 times [2022-02-15 01:45:09,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:09,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484811022] [2022-02-15 01:45:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:09,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:09,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:09,597 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:09,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:09,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:09,658 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:09,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:09,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:11,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:11,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484811022] [2022-02-15 01:45:11,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [484811022] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:11,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:11,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 01:45:11,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787650067] [2022-02-15 01:45:11,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:11,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 01:45:11,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 01:45:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=5529, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:45:11,669 INFO L87 Difference]: Start difference. First operand 570 states and 638 transitions. Second operand has 76 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 74 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:16,793 INFO L93 Difference]: Finished difference Result 831 states and 943 transitions. [2022-02-15 01:45:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-15 01:45:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 74 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-02-15 01:45:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:16,795 INFO L225 Difference]: With dead ends: 831 [2022-02-15 01:45:16,795 INFO L226 Difference]: Without dead ends: 721 [2022-02-15 01:45:16,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3137 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=569, Invalid=12087, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 01:45:16,796 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 148 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 10736 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 10883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 10736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:16,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 353 Invalid, 10883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 10736 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 01:45:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-02-15 01:45:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 617. [2022-02-15 01:45:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 609 states have (on average 1.116584564860427) internal successors, (680), 610 states have internal predecessors, (680), 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) [2022-02-15 01:45:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 687 transitions. [2022-02-15 01:45:17,444 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 687 transitions. Word has length 113 [2022-02-15 01:45:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:17,455 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 687 transitions. [2022-02-15 01:45:17,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 74 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 687 transitions. [2022-02-15 01:45:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 01:45:17,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:17,456 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:17,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:45:17,457 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash -339425273, now seen corresponding path program 38 times [2022-02-15 01:45:17,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:17,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283168309] [2022-02-15 01:45:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:17,507 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:17,543 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:17,544 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:17,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:17,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:17,626 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:17,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:17,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:19,935 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:19,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283168309] [2022-02-15 01:45:19,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283168309] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:19,935 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:19,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-15 01:45:19,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871082965] [2022-02-15 01:45:19,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:19,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-15 01:45:19,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:19,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-15 01:45:19,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=5830, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:45:19,937 INFO L87 Difference]: Start difference. First operand 617 states and 687 transitions. Second operand has 78 states, 78 states have (on average 1.435897435897436) internal successors, (112), 76 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:24,300 INFO L93 Difference]: Finished difference Result 783 states and 878 transitions. [2022-02-15 01:45:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-15 01:45:24,300 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.435897435897436) internal successors, (112), 76 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-02-15 01:45:24,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:24,302 INFO L225 Difference]: With dead ends: 783 [2022-02-15 01:45:24,302 INFO L226 Difference]: Without dead ends: 673 [2022-02-15 01:45:24,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=585, Invalid=12755, Unknown=0, NotChecked=0, Total=13340 [2022-02-15 01:45:24,303 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 234 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 9243 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 9393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 9243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:24,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 76 Invalid, 9393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 9243 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 01:45:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-02-15 01:45:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 620. [2022-02-15 01:45:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 612 states have (on average 1.1176470588235294) internal successors, (684), 613 states have internal predecessors, (684), 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) [2022-02-15 01:45:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 691 transitions. [2022-02-15 01:45:24,930 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 691 transitions. Word has length 116 [2022-02-15 01:45:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:24,930 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 691 transitions. [2022-02-15 01:45:24,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.435897435897436) internal successors, (112), 76 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 691 transitions. [2022-02-15 01:45:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-15 01:45:24,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:24,931 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 30, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:24,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:45:24,931 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:24,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1880204290, now seen corresponding path program 15 times [2022-02-15 01:45:24,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:24,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147379026] [2022-02-15 01:45:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:24,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:24,966 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:45:24,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:25,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:25,602 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:25,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147379026] [2022-02-15 01:45:25,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147379026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:25,603 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:25,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:45:25,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563304670] [2022-02-15 01:45:25,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:25,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:45:25,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:45:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:45:25,604 INFO L87 Difference]: Start difference. First operand 620 states and 691 transitions. Second operand has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 37 states have internal predecessors, (111), 2 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) [2022-02-15 01:45:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:26,723 INFO L93 Difference]: Finished difference Result 882 states and 998 transitions. [2022-02-15 01:45:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:45:26,723 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 37 states have internal predecessors, (111), 2 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) Word has length 119 [2022-02-15 01:45:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:26,725 INFO L225 Difference]: With dead ends: 882 [2022-02-15 01:45:26,725 INFO L226 Difference]: Without dead ends: 764 [2022-02-15 01:45:26,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 23 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:45:26,727 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:26,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 54 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:45:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-02-15 01:45:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 676. [2022-02-15 01:45:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 668 states have (on average 1.1107784431137724) internal successors, (742), 669 states have internal predecessors, (742), 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) [2022-02-15 01:45:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 749 transitions. [2022-02-15 01:45:27,425 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 749 transitions. Word has length 119 [2022-02-15 01:45:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:27,425 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 749 transitions. [2022-02-15 01:45:27,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 37 states have internal predecessors, (111), 2 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) [2022-02-15 01:45:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 749 transitions. [2022-02-15 01:45:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-15 01:45:27,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:27,437 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:27,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:45:27,437 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:27,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1669796284, now seen corresponding path program 39 times [2022-02-15 01:45:27,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:27,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140396159] [2022-02-15 01:45:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:27,488 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:27,529 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:27,529 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:27,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:27,602 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:27,603 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:27,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:27,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:30,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:30,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140396159] [2022-02-15 01:45:30,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2140396159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:30,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:30,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 01:45:30,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411195700] [2022-02-15 01:45:30,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:30,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 01:45:30,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 01:45:30,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=6292, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 01:45:30,206 INFO L87 Difference]: Start difference. First operand 676 states and 749 transitions. Second operand has 80 states, 80 states have (on average 1.4375) internal successors, (115), 78 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:34,316 INFO L93 Difference]: Finished difference Result 887 states and 1004 transitions. [2022-02-15 01:45:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-15 01:45:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.4375) internal successors, (115), 78 states have internal predecessors, (115), 2 states have call successors, (3), 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 119 [2022-02-15 01:45:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:34,318 INFO L225 Difference]: With dead ends: 887 [2022-02-15 01:45:34,318 INFO L226 Difference]: Without dead ends: 771 [2022-02-15 01:45:34,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2717 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=498, Invalid=10214, Unknown=0, NotChecked=0, Total=10712 [2022-02-15 01:45:34,320 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 7680 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 7803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 7680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:34,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 73 Invalid, 7803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 7680 Invalid, 0 Unknown, 57 Unchecked, 2.4s Time] [2022-02-15 01:45:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-02-15 01:45:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 632. [2022-02-15 01:45:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 624 states have (on average 1.1185897435897436) internal successors, (698), 625 states have internal predecessors, (698), 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) [2022-02-15 01:45:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 705 transitions. [2022-02-15 01:45:34,993 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 705 transitions. Word has length 119 [2022-02-15 01:45:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:34,993 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 705 transitions. [2022-02-15 01:45:34,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.4375) internal successors, (115), 78 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 705 transitions. [2022-02-15 01:45:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-15 01:45:34,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:34,995 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:34,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:45:34,995 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -794377497, now seen corresponding path program 40 times [2022-02-15 01:45:34,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:34,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567352569] [2022-02-15 01:45:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:35,042 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:35,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:35,077 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:35,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:35,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:35,140 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:35,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:35,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:37,633 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:37,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567352569] [2022-02-15 01:45:37,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [567352569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:37,633 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:37,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-15 01:45:37,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148109416] [2022-02-15 01:45:37,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:37,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-15 01:45:37,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:37,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-15 01:45:37,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=6456, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:45:37,635 INFO L87 Difference]: Start difference. First operand 632 states and 705 transitions. Second operand has 82 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 80 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:43,493 INFO L93 Difference]: Finished difference Result 911 states and 1031 transitions. [2022-02-15 01:45:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-15 01:45:43,493 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 80 states have internal predecessors, (118), 2 states have call successors, (3), 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 122 [2022-02-15 01:45:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:43,495 INFO L225 Difference]: With dead ends: 911 [2022-02-15 01:45:43,495 INFO L226 Difference]: Without dead ends: 795 [2022-02-15 01:45:43,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3689 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=617, Invalid=14145, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 01:45:43,497 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 12383 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 12540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 12383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:43,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 318 Invalid, 12540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 12383 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 01:45:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-15 01:45:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 682. [2022-02-15 01:45:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 674 states have (on average 1.1127596439169138) internal successors, (750), 675 states have internal predecessors, (750), 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) [2022-02-15 01:45:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 757 transitions. [2022-02-15 01:45:44,293 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 757 transitions. Word has length 122 [2022-02-15 01:45:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:44,293 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 757 transitions. [2022-02-15 01:45:44,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 80 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 757 transitions. [2022-02-15 01:45:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-15 01:45:44,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:44,294 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 32, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:44,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:45:44,294 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:44,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:44,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1442311962, now seen corresponding path program 16 times [2022-02-15 01:45:44,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:44,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725239873] [2022-02-15 01:45:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:44,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:44,315 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:45:44,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:44,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:45,022 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:45,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725239873] [2022-02-15 01:45:45,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1725239873] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:45,023 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:45,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:45:45,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628635763] [2022-02-15 01:45:45,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:45,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:45:45,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:45:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:45:45,024 INFO L87 Difference]: Start difference. First operand 682 states and 757 transitions. Second operand has 40 states, 40 states have (on average 2.925) internal successors, (117), 39 states have internal predecessors, (117), 2 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) [2022-02-15 01:45:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:46,218 INFO L93 Difference]: Finished difference Result 958 states and 1080 transitions. [2022-02-15 01:45:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:45:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.925) internal successors, (117), 39 states have internal predecessors, (117), 2 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) Word has length 125 [2022-02-15 01:45:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:46,220 INFO L225 Difference]: With dead ends: 958 [2022-02-15 01:45:46,220 INFO L226 Difference]: Without dead ends: 834 [2022-02-15 01:45:46,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 26 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:45:46,221 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:46,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 37 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:45:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-02-15 01:45:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 741. [2022-02-15 01:45:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 733 states have (on average 1.106412005457026) internal successors, (811), 734 states have internal predecessors, (811), 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) [2022-02-15 01:45:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 818 transitions. [2022-02-15 01:45:47,062 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 818 transitions. Word has length 125 [2022-02-15 01:45:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:47,063 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 818 transitions. [2022-02-15 01:45:47,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.925) internal successors, (117), 39 states have internal predecessors, (117), 2 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) [2022-02-15 01:45:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 818 transitions. [2022-02-15 01:45:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-15 01:45:47,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:47,064 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:47,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:45:47,064 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash -234715292, now seen corresponding path program 41 times [2022-02-15 01:45:47,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:47,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900817361] [2022-02-15 01:45:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:47,097 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:47,136 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:47,136 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:47,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:47,210 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:47,210 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:47,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:50,130 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:50,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900817361] [2022-02-15 01:45:50,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [900817361] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:50,130 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:50,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-15 01:45:50,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878000518] [2022-02-15 01:45:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:50,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-15 01:45:50,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:50,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-15 01:45:50,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=6781, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 01:45:50,132 INFO L87 Difference]: Start difference. First operand 741 states and 818 transitions. Second operand has 84 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 82 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:56,201 INFO L93 Difference]: Finished difference Result 922 states and 1026 transitions. [2022-02-15 01:45:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-02-15 01:45:56,201 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 82 states have internal predecessors, (121), 2 states have call successors, (3), 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 125 [2022-02-15 01:45:56,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:56,203 INFO L225 Difference]: With dead ends: 922 [2022-02-15 01:45:56,203 INFO L226 Difference]: Without dead ends: 800 [2022-02-15 01:45:56,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3883 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=633, Invalid=14867, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 01:45:56,205 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 247 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 11534 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 11697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 11534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:56,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 124 Invalid, 11697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 11534 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 01:45:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-02-15 01:45:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 744. [2022-02-15 01:45:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 736 states have (on average 1.107336956521739) internal successors, (815), 737 states have internal predecessors, (815), 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) [2022-02-15 01:45:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 822 transitions. [2022-02-15 01:45:57,080 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 822 transitions. Word has length 125 [2022-02-15 01:45:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:57,081 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 822 transitions. [2022-02-15 01:45:57,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 82 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 822 transitions. [2022-02-15 01:45:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-15 01:45:57,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:57,096 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:57,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:45:57,097 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:57,097 INFO L85 PathProgramCache]: Analyzing trace with hash -401009209, now seen corresponding path program 42 times [2022-02-15 01:45:57,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:57,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86540331] [2022-02-15 01:45:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:57,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:57,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:57,193 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:57,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:57,282 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:57,282 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:57,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:57,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:00,298 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:00,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86540331] [2022-02-15 01:46:00,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [86540331] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:00,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:00,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-15 01:46:00,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379048424] [2022-02-15 01:46:00,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:00,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-15 01:46:00,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:00,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-15 01:46:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=7113, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:46:00,300 INFO L87 Difference]: Start difference. First operand 744 states and 822 transitions. Second operand has 86 states, 86 states have (on average 1.441860465116279) internal successors, (124), 84 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:05,977 INFO L93 Difference]: Finished difference Result 926 states and 1031 transitions. [2022-02-15 01:46:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-02-15 01:46:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.441860465116279) internal successors, (124), 84 states have internal predecessors, (124), 2 states have call successors, (3), 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 128 [2022-02-15 01:46:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:05,980 INFO L225 Difference]: With dead ends: 926 [2022-02-15 01:46:05,980 INFO L226 Difference]: Without dead ends: 804 [2022-02-15 01:46:05,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4157 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=650, Invalid=15606, Unknown=0, NotChecked=0, Total=16256 [2022-02-15 01:46:05,982 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 247 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 11288 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 11455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 11288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:05,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 106 Invalid, 11455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 11288 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 01:46:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-15 01:46:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 747. [2022-02-15 01:46:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 739 states have (on average 1.108254397834912) internal successors, (819), 740 states have internal predecessors, (819), 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) [2022-02-15 01:46:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 826 transitions. [2022-02-15 01:46:06,926 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 826 transitions. Word has length 128 [2022-02-15 01:46:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:06,926 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 826 transitions. [2022-02-15 01:46:06,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.441860465116279) internal successors, (124), 84 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 826 transitions. [2022-02-15 01:46:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-02-15 01:46:06,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:06,927 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 34, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:06,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:46:06,927 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:06,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:06,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1062844354, now seen corresponding path program 17 times [2022-02-15 01:46:06,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:06,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604395434] [2022-02-15 01:46:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:06,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:06,946 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:46:06,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:07,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:07,608 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:07,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604395434] [2022-02-15 01:46:07,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1604395434] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:07,609 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:07,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 01:46:07,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116380171] [2022-02-15 01:46:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:07,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 01:46:07,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 01:46:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:46:07,610 INFO L87 Difference]: Start difference. First operand 747 states and 826 transitions. Second operand has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 41 states have internal predecessors, (123), 2 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) [2022-02-15 01:46:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:09,117 INFO L93 Difference]: Finished difference Result 1037 states and 1165 transitions. [2022-02-15 01:46:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:46:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 41 states have internal predecessors, (123), 2 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) Word has length 131 [2022-02-15 01:46:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:09,120 INFO L225 Difference]: With dead ends: 1037 [2022-02-15 01:46:09,120 INFO L226 Difference]: Without dead ends: 907 [2022-02-15 01:46:09,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 27 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:46:09,121 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 143 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:09,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 38 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:46:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-02-15 01:46:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 809. [2022-02-15 01:46:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 801 states have (on average 1.1023720349563046) internal successors, (883), 802 states have internal predecessors, (883), 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) [2022-02-15 01:46:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 890 transitions. [2022-02-15 01:46:10,108 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 890 transitions. Word has length 131 [2022-02-15 01:46:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:10,108 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 890 transitions. [2022-02-15 01:46:10,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 41 states have internal predecessors, (123), 2 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) [2022-02-15 01:46:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 890 transitions. [2022-02-15 01:46:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-02-15 01:46:10,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:10,109 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:10,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:46:10,110 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:10,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1929169028, now seen corresponding path program 43 times [2022-02-15 01:46:10,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:10,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449624005] [2022-02-15 01:46:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:10,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:10,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:10,203 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:10,239 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:10,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:10,278 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:10,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:10,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:12,837 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:12,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449624005] [2022-02-15 01:46:12,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449624005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:12,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:12,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-15 01:46:12,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435598313] [2022-02-15 01:46:12,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:12,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-15 01:46:12,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-15 01:46:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=7455, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 01:46:12,839 INFO L87 Difference]: Start difference. First operand 809 states and 890 transitions. Second operand has 88 states, 88 states have (on average 1.4431818181818181) internal successors, (127), 86 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:19,490 INFO L93 Difference]: Finished difference Result 998 states and 1107 transitions. [2022-02-15 01:46:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-15 01:46:19,490 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.4431818181818181) internal successors, (127), 86 states have internal predecessors, (127), 2 states have call successors, (3), 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 131 [2022-02-15 01:46:19,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:19,492 INFO L225 Difference]: With dead ends: 998 [2022-02-15 01:46:19,492 INFO L226 Difference]: Without dead ends: 870 [2022-02-15 01:46:19,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4286 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=665, Invalid=16365, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 01:46:19,493 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 172 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 12616 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 12786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 12616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:19,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 291 Invalid, 12786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 12616 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-15 01:46:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-02-15 01:46:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 812. [2022-02-15 01:46:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 804 states have (on average 1.1032338308457712) internal successors, (887), 805 states have internal predecessors, (887), 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) [2022-02-15 01:46:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 894 transitions. [2022-02-15 01:46:20,563 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 894 transitions. Word has length 131 [2022-02-15 01:46:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:20,564 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 894 transitions. [2022-02-15 01:46:20,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.4431818181818181) internal successors, (127), 86 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 894 transitions. [2022-02-15 01:46:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-15 01:46:20,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:20,565 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:20,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:46:20,565 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash 712622247, now seen corresponding path program 44 times [2022-02-15 01:46:20,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:20,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086057855] [2022-02-15 01:46:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:20,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:20,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:20,641 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:20,682 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:20,738 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:20,739 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:20,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:20,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:24,409 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:24,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086057855] [2022-02-15 01:46:24,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086057855] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:24,409 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:24,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-15 01:46:24,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454797604] [2022-02-15 01:46:24,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:24,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-15 01:46:24,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:24,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-15 01:46:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=8075, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:46:24,411 INFO L87 Difference]: Start difference. First operand 812 states and 894 transitions. Second operand has 90 states, 90 states have (on average 1.4444444444444444) internal successors, (130), 88 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:29,695 INFO L93 Difference]: Finished difference Result 1047 states and 1178 transitions. [2022-02-15 01:46:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-15 01:46:29,695 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.4444444444444444) internal successors, (130), 88 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-15 01:46:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:29,697 INFO L225 Difference]: With dead ends: 1047 [2022-02-15 01:46:29,697 INFO L226 Difference]: Without dead ends: 919 [2022-02-15 01:46:29,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3547 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=672, Invalid=13134, Unknown=0, NotChecked=0, Total=13806 [2022-02-15 01:46:29,698 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 10427 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 10502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 10427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:29,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 88 Invalid, 10502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 10427 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 01:46:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-02-15 01:46:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 762. [2022-02-15 01:46:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 754 states have (on average 1.110079575596817) internal successors, (837), 755 states have internal predecessors, (837), 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) [2022-02-15 01:46:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 844 transitions. [2022-02-15 01:46:30,644 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 844 transitions. Word has length 134 [2022-02-15 01:46:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:30,645 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 844 transitions. [2022-02-15 01:46:30,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.4444444444444444) internal successors, (130), 88 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 844 transitions. [2022-02-15 01:46:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-15 01:46:30,646 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:30,646 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:30,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:46:30,646 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:30,646 INFO L85 PathProgramCache]: Analyzing trace with hash -718368346, now seen corresponding path program 18 times [2022-02-15 01:46:30,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:30,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725331653] [2022-02-15 01:46:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:30,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:30,678 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:46:30,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:30,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:31,444 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:31,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725331653] [2022-02-15 01:46:31,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725331653] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:31,444 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:31,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:46:31,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062931475] [2022-02-15 01:46:31,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:31,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:46:31,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:31,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:46:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:46:31,446 INFO L87 Difference]: Start difference. First operand 762 states and 844 transitions. Second operand has 44 states, 44 states have (on average 2.9318181818181817) internal successors, (129), 43 states have internal predecessors, (129), 2 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) [2022-02-15 01:46:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:33,160 INFO L93 Difference]: Finished difference Result 1116 states and 1249 transitions. [2022-02-15 01:46:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:46:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9318181818181817) internal successors, (129), 43 states have internal predecessors, (129), 2 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) Word has length 137 [2022-02-15 01:46:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:33,163 INFO L225 Difference]: With dead ends: 1116 [2022-02-15 01:46:33,163 INFO L226 Difference]: Without dead ends: 980 [2022-02-15 01:46:33,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 29 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:46:33,164 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:33,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 43 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:46:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-02-15 01:46:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 824. [2022-02-15 01:46:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 816 states have (on average 1.1041666666666667) internal successors, (901), 817 states have internal predecessors, (901), 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) [2022-02-15 01:46:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 908 transitions. [2022-02-15 01:46:34,219 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 908 transitions. Word has length 137 [2022-02-15 01:46:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:34,219 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 908 transitions. [2022-02-15 01:46:34,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9318181818181817) internal successors, (129), 43 states have internal predecessors, (129), 2 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) [2022-02-15 01:46:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 908 transitions. [2022-02-15 01:46:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-15 01:46:34,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:34,220 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:34,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:46:34,220 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:34,221 INFO L85 PathProgramCache]: Analyzing trace with hash -498486876, now seen corresponding path program 45 times [2022-02-15 01:46:34,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:34,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992355991] [2022-02-15 01:46:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:34,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:34,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:34,305 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:34,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:34,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:34,379 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:34,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:34,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:37,752 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:37,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992355991] [2022-02-15 01:46:37,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992355991] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:37,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:37,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-15 01:46:37,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576551597] [2022-02-15 01:46:37,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:37,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-15 01:46:37,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:37,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-15 01:46:37,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=8439, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:46:37,754 INFO L87 Difference]: Start difference. First operand 824 states and 908 transitions. Second operand has 92 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 90 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:43,260 INFO L93 Difference]: Finished difference Result 1118 states and 1252 transitions. [2022-02-15 01:46:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-15 01:46:43,261 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 90 states have internal predecessors, (133), 2 states have call successors, (3), 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 137 [2022-02-15 01:46:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:43,263 INFO L225 Difference]: With dead ends: 1118 [2022-02-15 01:46:43,263 INFO L226 Difference]: Without dead ends: 984 [2022-02-15 01:46:43,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=682, Invalid=13598, Unknown=0, NotChecked=0, Total=14280 [2022-02-15 01:46:43,265 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 10476 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 10552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 10476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:43,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 108 Invalid, 10552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 10476 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 01:46:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-02-15 01:46:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 827. [2022-02-15 01:46:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.1037851037851039) internal successors, (904), 820 states have internal predecessors, (904), 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) [2022-02-15 01:46:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 911 transitions. [2022-02-15 01:46:44,352 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 911 transitions. Word has length 137 [2022-02-15 01:46:44,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:44,352 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 911 transitions. [2022-02-15 01:46:44,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 90 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 911 transitions. [2022-02-15 01:46:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-15 01:46:44,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:44,353 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:44,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:46:44,353 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:44,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1016880536, now seen corresponding path program 46 times [2022-02-15 01:46:44,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:44,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128905317] [2022-02-15 01:46:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:44,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:44,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:44,436 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:44,481 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:44,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:44,523 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:44,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:44,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:48,221 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:48,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128905317] [2022-02-15 01:46:48,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128905317] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:48,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:48,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-15 01:46:48,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710578231] [2022-02-15 01:46:48,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:48,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-15 01:46:48,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:48,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-15 01:46:48,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=8616, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 01:46:48,224 INFO L87 Difference]: Start difference. First operand 827 states and 911 transitions. Second operand has 93 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 91 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:56,263 INFO L93 Difference]: Finished difference Result 1139 states and 1274 transitions. [2022-02-15 01:46:56,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-15 01:46:56,263 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 91 states have internal predecessors, (133), 2 states have call successors, (3), 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 137 [2022-02-15 01:46:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:56,273 INFO L225 Difference]: With dead ends: 1139 [2022-02-15 01:46:56,273 INFO L226 Difference]: Without dead ends: 1005 [2022-02-15 01:46:56,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5421 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=858, Invalid=18882, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:46:56,293 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 141 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 14248 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 14377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 14248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:56,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 321 Invalid, 14377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 14248 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-02-15 01:46:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-02-15 01:46:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 827. [2022-02-15 01:46:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.105006105006105) internal successors, (905), 820 states have internal predecessors, (905), 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) [2022-02-15 01:46:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 912 transitions. [2022-02-15 01:46:57,434 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 912 transitions. Word has length 137 [2022-02-15 01:46:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:57,434 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 912 transitions. [2022-02-15 01:46:57,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 91 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 912 transitions. [2022-02-15 01:46:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-15 01:46:57,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:57,436 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:57,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:46:57,436 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1369883527, now seen corresponding path program 47 times [2022-02-15 01:46:57,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:57,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223974393] [2022-02-15 01:46:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:57,484 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:57,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:57,527 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:57,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:57,615 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:57,616 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:57,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:01,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:01,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223974393] [2022-02-15 01:47:01,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [223974393] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:01,125 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:01,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-15 01:47:01,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273522195] [2022-02-15 01:47:01,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:01,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-15 01:47:01,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-15 01:47:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=8526, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:47:01,126 INFO L87 Difference]: Start difference. First operand 827 states and 912 transitions. Second operand has 94 states, 94 states have (on average 1.446808510638298) internal successors, (136), 92 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:08,023 INFO L93 Difference]: Finished difference Result 1148 states and 1286 transitions. [2022-02-15 01:47:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-15 01:47:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.446808510638298) internal successors, (136), 92 states have internal predecessors, (136), 2 states have call successors, (3), 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 140 [2022-02-15 01:47:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:08,026 INFO L225 Difference]: With dead ends: 1148 [2022-02-15 01:47:08,026 INFO L226 Difference]: Without dead ends: 1014 [2022-02-15 01:47:08,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4928 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=713, Invalid=18747, Unknown=0, NotChecked=0, Total=19460 [2022-02-15 01:47:08,027 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 262 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 13353 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 13535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 13353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:08,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 133 Invalid, 13535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 13353 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 01:47:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-02-15 01:47:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 886. [2022-02-15 01:47:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 878 states have (on average 1.1002277904328017) internal successors, (966), 879 states have internal predecessors, (966), 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) [2022-02-15 01:47:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 973 transitions. [2022-02-15 01:47:09,317 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 973 transitions. Word has length 140 [2022-02-15 01:47:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:09,317 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 973 transitions. [2022-02-15 01:47:09,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.446808510638298) internal successors, (136), 92 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 973 transitions. [2022-02-15 01:47:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-15 01:47:09,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:09,318 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 38, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:09,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:47:09,319 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1447343230, now seen corresponding path program 19 times [2022-02-15 01:47:09,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:09,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161367465] [2022-02-15 01:47:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:09,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:09,345 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:47:09,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:09,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:10,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:10,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161367465] [2022-02-15 01:47:10,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1161367465] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:10,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:10,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 01:47:10,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361198504] [2022-02-15 01:47:10,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:10,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 01:47:10,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:10,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 01:47:10,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:47:10,146 INFO L87 Difference]: Start difference. First operand 886 states and 973 transitions. Second operand has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 45 states have internal predecessors, (135), 2 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) [2022-02-15 01:47:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:11,987 INFO L93 Difference]: Finished difference Result 1204 states and 1344 transitions. [2022-02-15 01:47:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:47:11,987 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 45 states have internal predecessors, (135), 2 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) Word has length 143 [2022-02-15 01:47:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:11,989 INFO L225 Difference]: With dead ends: 1204 [2022-02-15 01:47:11,989 INFO L226 Difference]: Without dead ends: 1062 [2022-02-15 01:47:11,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 27 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:47:11,990 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 146 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:11,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 43 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:47:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-02-15 01:47:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 954. [2022-02-15 01:47:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 946 states have (on average 1.095137420718816) internal successors, (1036), 947 states have internal predecessors, (1036), 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) [2022-02-15 01:47:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1043 transitions. [2022-02-15 01:47:13,342 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1043 transitions. Word has length 143 [2022-02-15 01:47:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:13,342 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1043 transitions. [2022-02-15 01:47:13,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 45 states have internal predecessors, (135), 2 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) [2022-02-15 01:47:13,342 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1043 transitions. [2022-02-15 01:47:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-15 01:47:13,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:13,344 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:13,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:47:13,344 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:13,344 INFO L85 PathProgramCache]: Analyzing trace with hash -783596860, now seen corresponding path program 48 times [2022-02-15 01:47:13,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:13,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993784520] [2022-02-15 01:47:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:13,377 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:13,419 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:13,419 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:13,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:13,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:13,502 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:13,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:13,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:16,910 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:16,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993784520] [2022-02-15 01:47:16,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993784520] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:16,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:16,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-15 01:47:16,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843966482] [2022-02-15 01:47:16,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:16,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-15 01:47:16,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:16,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-15 01:47:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=8899, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:47:16,920 INFO L87 Difference]: Start difference. First operand 954 states and 1043 transitions. Second operand has 96 states, 96 states have (on average 1.4479166666666667) internal successors, (139), 94 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:24,640 INFO L93 Difference]: Finished difference Result 1159 states and 1278 transitions. [2022-02-15 01:47:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-15 01:47:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.4479166666666667) internal successors, (139), 94 states have internal predecessors, (139), 2 states have call successors, (3), 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 143 [2022-02-15 01:47:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:24,642 INFO L225 Difference]: With dead ends: 1159 [2022-02-15 01:47:24,642 INFO L226 Difference]: Without dead ends: 1019 [2022-02-15 01:47:24,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5152 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=729, Invalid=19577, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 01:47:24,643 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 258 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 14063 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 14248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 14063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:24,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 168 Invalid, 14248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 14063 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 01:47:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-02-15 01:47:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 957. [2022-02-15 01:47:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 949 states have (on average 1.095890410958904) internal successors, (1040), 950 states have internal predecessors, (1040), 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) [2022-02-15 01:47:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1047 transitions. [2022-02-15 01:47:26,036 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1047 transitions. Word has length 143 [2022-02-15 01:47:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:26,037 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 1047 transitions. [2022-02-15 01:47:26,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.4479166666666667) internal successors, (139), 94 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:26,037 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1047 transitions. [2022-02-15 01:47:26,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-15 01:47:26,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:26,038 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:26,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:47:26,038 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1191305625, now seen corresponding path program 49 times [2022-02-15 01:47:26,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:26,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567471315] [2022-02-15 01:47:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:26,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:26,123 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:26,123 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:26,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:26,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:26,248 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:26,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:26,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:29,152 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:29,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567471315] [2022-02-15 01:47:29,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [567471315] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:29,152 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:29,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-15 01:47:29,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950738166] [2022-02-15 01:47:29,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:29,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-15 01:47:29,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-15 01:47:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=9280, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:47:29,153 INFO L87 Difference]: Start difference. First operand 957 states and 1047 transitions. Second operand has 98 states, 98 states have (on average 1.4489795918367347) internal successors, (142), 96 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:37,343 INFO L93 Difference]: Finished difference Result 1163 states and 1283 transitions. [2022-02-15 01:47:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-15 01:47:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.4489795918367347) internal successors, (142), 96 states have internal predecessors, (142), 2 states have call successors, (3), 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 146 [2022-02-15 01:47:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:37,346 INFO L225 Difference]: With dead ends: 1163 [2022-02-15 01:47:37,346 INFO L226 Difference]: Without dead ends: 1023 [2022-02-15 01:47:37,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5381 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=745, Invalid=20425, Unknown=0, NotChecked=0, Total=21170 [2022-02-15 01:47:37,347 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 234 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 16065 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 16254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 16065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:37,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 275 Invalid, 16254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 16065 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-15 01:47:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-02-15 01:47:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 960. [2022-02-15 01:47:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 952 states have (on average 1.096638655462185) internal successors, (1044), 953 states have internal predecessors, (1044), 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) [2022-02-15 01:47:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1051 transitions. [2022-02-15 01:47:38,851 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1051 transitions. Word has length 146 [2022-02-15 01:47:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:38,851 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1051 transitions. [2022-02-15 01:47:38,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.4489795918367347) internal successors, (142), 96 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1051 transitions. [2022-02-15 01:47:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-15 01:47:38,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:38,853 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:38,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:47:38,853 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:38,853 INFO L85 PathProgramCache]: Analyzing trace with hash -714288538, now seen corresponding path program 20 times [2022-02-15 01:47:38,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:38,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501412422] [2022-02-15 01:47:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:38,873 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:38,873 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:47:38,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:39,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:39,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:39,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501412422] [2022-02-15 01:47:39,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501412422] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:39,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:39,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 01:47:39,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027685333] [2022-02-15 01:47:39,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:39,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 01:47:39,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 01:47:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:47:39,628 INFO L87 Difference]: Start difference. First operand 960 states and 1051 transitions. Second operand has 48 states, 48 states have (on average 2.9375) internal successors, (141), 47 states have internal predecessors, (141), 2 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) [2022-02-15 01:47:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:41,849 INFO L93 Difference]: Finished difference Result 1292 states and 1438 transitions. [2022-02-15 01:47:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:47:41,849 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 47 states have internal predecessors, (141), 2 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) Word has length 149 [2022-02-15 01:47:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:41,851 INFO L225 Difference]: With dead ends: 1292 [2022-02-15 01:47:41,851 INFO L226 Difference]: Without dead ends: 1144 [2022-02-15 01:47:41,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 27 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:47:41,852 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 150 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:41,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 74 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:47:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-02-15 01:47:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1031. [2022-02-15 01:47:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1023 states have (on average 1.0918866080156402) internal successors, (1117), 1024 states have internal predecessors, (1117), 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) [2022-02-15 01:47:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1124 transitions. [2022-02-15 01:47:43,381 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1124 transitions. Word has length 149 [2022-02-15 01:47:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:43,381 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 1124 transitions. [2022-02-15 01:47:43,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 47 states have internal predecessors, (141), 2 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) [2022-02-15 01:47:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1124 transitions. [2022-02-15 01:47:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-15 01:47:43,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:43,382 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:43,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:47:43,382 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1075610652, now seen corresponding path program 50 times [2022-02-15 01:47:43,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:43,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593648095] [2022-02-15 01:47:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:43,417 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:43,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:43,458 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:43,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:43,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:43,548 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:43,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:43,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:47,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:47,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593648095] [2022-02-15 01:47:47,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593648095] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:47,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:47,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-15 01:47:47,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164140343] [2022-02-15 01:47:47,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:47,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-15 01:47:47,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:47,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-15 01:47:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=9669, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 01:47:47,249 INFO L87 Difference]: Start difference. First operand 1031 states and 1124 transitions. Second operand has 100 states, 100 states have (on average 1.45) internal successors, (145), 98 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:55,135 INFO L93 Difference]: Finished difference Result 1244 states and 1368 transitions. [2022-02-15 01:47:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-15 01:47:55,135 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.45) internal successors, (145), 98 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-02-15 01:47:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:55,137 INFO L225 Difference]: With dead ends: 1244 [2022-02-15 01:47:55,137 INFO L226 Difference]: Without dead ends: 1098 [2022-02-15 01:47:55,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5615 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=761, Invalid=21291, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 01:47:55,138 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 255 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 15353 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 15546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 15353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:55,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 193 Invalid, 15546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 15353 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 01:47:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-02-15 01:47:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1034. [2022-02-15 01:47:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1026 states have (on average 1.0925925925925926) internal successors, (1121), 1027 states have internal predecessors, (1121), 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) [2022-02-15 01:47:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1128 transitions. [2022-02-15 01:47:56,729 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1128 transitions. Word has length 149 [2022-02-15 01:47:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:56,729 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 1128 transitions. [2022-02-15 01:47:56,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.45) internal successors, (145), 98 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1128 transitions. [2022-02-15 01:47:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-15 01:47:56,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:56,731 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:56,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:47:56,731 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1029558599, now seen corresponding path program 51 times [2022-02-15 01:47:56,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:56,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821575547] [2022-02-15 01:47:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:56,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:56,800 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:56,800 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:56,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:56,860 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:56,860 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:56,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:56,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:00,267 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:00,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821575547] [2022-02-15 01:48:00,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [821575547] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:00,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:00,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-15 01:48:00,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881331721] [2022-02-15 01:48:00,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:00,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-15 01:48:00,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-15 01:48:00,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=10066, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:48:00,269 INFO L87 Difference]: Start difference. First operand 1034 states and 1128 transitions. Second operand has 102 states, 102 states have (on average 1.4509803921568627) internal successors, (148), 100 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:08,552 INFO L93 Difference]: Finished difference Result 1248 states and 1373 transitions. [2022-02-15 01:48:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-15 01:48:08,552 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.4509803921568627) internal successors, (148), 100 states have internal predecessors, (148), 2 states have call successors, (3), 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 152 [2022-02-15 01:48:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:08,554 INFO L225 Difference]: With dead ends: 1248 [2022-02-15 01:48:08,554 INFO L226 Difference]: Without dead ends: 1102 [2022-02-15 01:48:08,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5854 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=777, Invalid=22175, Unknown=0, NotChecked=0, Total=22952 [2022-02-15 01:48:08,555 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 191 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 17449 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 17645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 17449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:08,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 338 Invalid, 17645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 17449 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-02-15 01:48:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-02-15 01:48:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1037. [2022-02-15 01:48:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1029 states have (on average 1.0932944606413995) internal successors, (1125), 1030 states have internal predecessors, (1125), 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) [2022-02-15 01:48:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1132 transitions. [2022-02-15 01:48:10,155 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1132 transitions. Word has length 152 [2022-02-15 01:48:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:10,155 INFO L470 AbstractCegarLoop]: Abstraction has 1037 states and 1132 transitions. [2022-02-15 01:48:10,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.4509803921568627) internal successors, (148), 100 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1132 transitions. [2022-02-15 01:48:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-15 01:48:10,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:10,157 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:10,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 01:48:10,157 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1973313346, now seen corresponding path program 21 times [2022-02-15 01:48:10,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:10,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733253686] [2022-02-15 01:48:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:10,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:10,196 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:48:10,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:10,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:11,077 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:11,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733253686] [2022-02-15 01:48:11,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [733253686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:11,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:11,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:48:11,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472571433] [2022-02-15 01:48:11,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:11,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:48:11,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:48:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:48:11,078 INFO L87 Difference]: Start difference. First operand 1037 states and 1132 transitions. Second operand has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 2 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) [2022-02-15 01:48:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:13,498 INFO L93 Difference]: Finished difference Result 1383 states and 1535 transitions. [2022-02-15 01:48:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:48:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 2 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) Word has length 155 [2022-02-15 01:48:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:13,500 INFO L225 Difference]: With dead ends: 1383 [2022-02-15 01:48:13,500 INFO L226 Difference]: Without dead ends: 1229 [2022-02-15 01:48:13,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 31 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:48:13,501 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 183 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:13,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 42 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:48:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-02-15 01:48:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1111. [2022-02-15 01:48:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1103 states have (on average 1.0888485947416138) internal successors, (1201), 1104 states have internal predecessors, (1201), 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) [2022-02-15 01:48:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1208 transitions. [2022-02-15 01:48:15,252 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1208 transitions. Word has length 155 [2022-02-15 01:48:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:15,253 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 1208 transitions. [2022-02-15 01:48:15,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 2 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) [2022-02-15 01:48:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1208 transitions. [2022-02-15 01:48:15,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-15 01:48:15,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:15,254 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:15,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 01:48:15,255 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:15,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1014258948, now seen corresponding path program 52 times [2022-02-15 01:48:15,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:15,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040023788] [2022-02-15 01:48:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:15,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:15,348 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:15,348 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:15,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:15,424 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:15,425 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:15,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:15,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:19,596 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:19,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040023788] [2022-02-15 01:48:19,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040023788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:19,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:19,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-15 01:48:19,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118652267] [2022-02-15 01:48:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:19,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-15 01:48:19,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-15 01:48:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=10471, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:48:19,599 INFO L87 Difference]: Start difference. First operand 1111 states and 1208 transitions. Second operand has 104 states, 104 states have (on average 1.4519230769230769) internal successors, (151), 102 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:28,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:28,372 INFO L93 Difference]: Finished difference Result 1332 states and 1461 transitions. [2022-02-15 01:48:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-02-15 01:48:28,372 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.4519230769230769) internal successors, (151), 102 states have internal predecessors, (151), 2 states have call successors, (3), 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 155 [2022-02-15 01:48:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:28,374 INFO L225 Difference]: With dead ends: 1332 [2022-02-15 01:48:28,374 INFO L226 Difference]: Without dead ends: 1180 [2022-02-15 01:48:28,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6098 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=793, Invalid=23077, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 01:48:28,375 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 209 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 20470 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 20670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 20470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:28,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 383 Invalid, 20670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 20470 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-02-15 01:48:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-02-15 01:48:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1114. [2022-02-15 01:48:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1106 states have (on average 1.089511754068716) internal successors, (1205), 1107 states have internal predecessors, (1205), 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) [2022-02-15 01:48:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1212 transitions. [2022-02-15 01:48:30,145 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1212 transitions. Word has length 155 [2022-02-15 01:48:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:30,145 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1212 transitions. [2022-02-15 01:48:30,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.4519230769230769) internal successors, (151), 102 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1212 transitions. [2022-02-15 01:48:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-15 01:48:30,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:30,147 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:30,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 01:48:30,147 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash 488889383, now seen corresponding path program 53 times [2022-02-15 01:48:30,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:30,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296928366] [2022-02-15 01:48:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:30,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:30,241 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:30,241 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:30,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:30,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:30,318 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:30,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:30,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:34,118 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:34,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296928366] [2022-02-15 01:48:34,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [296928366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:34,119 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:34,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-15 01:48:34,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9540635] [2022-02-15 01:48:34,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:34,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-15 01:48:34,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-15 01:48:34,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=10884, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 01:48:34,120 INFO L87 Difference]: Start difference. First operand 1114 states and 1212 transitions. Second operand has 106 states, 106 states have (on average 1.4528301886792452) internal successors, (154), 104 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:43,241 INFO L93 Difference]: Finished difference Result 1336 states and 1466 transitions. [2022-02-15 01:48:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-02-15 01:48:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.4528301886792452) internal successors, (154), 104 states have internal predecessors, (154), 2 states have call successors, (3), 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 158 [2022-02-15 01:48:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:43,257 INFO L225 Difference]: With dead ends: 1336 [2022-02-15 01:48:43,257 INFO L226 Difference]: Without dead ends: 1184 [2022-02-15 01:48:43,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=809, Invalid=23997, Unknown=0, NotChecked=0, Total=24806 [2022-02-15 01:48:43,258 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 249 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 18537 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 18742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 18537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:43,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 304 Invalid, 18742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 18537 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-15 01:48:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-02-15 01:48:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1117. [2022-02-15 01:48:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1109 states have (on average 1.090171325518485) internal successors, (1209), 1110 states have internal predecessors, (1209), 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) [2022-02-15 01:48:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1216 transitions. [2022-02-15 01:48:45,032 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1216 transitions. Word has length 158 [2022-02-15 01:48:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:45,032 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1216 transitions. [2022-02-15 01:48:45,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.4528301886792452) internal successors, (154), 104 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1216 transitions. [2022-02-15 01:48:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-15 01:48:45,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:45,034 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 44, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:45,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 01:48:45,034 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1132122918, now seen corresponding path program 22 times [2022-02-15 01:48:45,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:45,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433724976] [2022-02-15 01:48:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:45,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:45,054 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:48:45,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:45,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:45,967 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:45,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433724976] [2022-02-15 01:48:45,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1433724976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:45,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:45,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 01:48:45,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051089887] [2022-02-15 01:48:45,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:45,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 01:48:45,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 01:48:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:48:45,969 INFO L87 Difference]: Start difference. First operand 1117 states and 1216 transitions. Second operand has 52 states, 52 states have (on average 2.9423076923076925) internal successors, (153), 51 states have internal predecessors, (153), 2 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) [2022-02-15 01:48:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:48,513 INFO L93 Difference]: Finished difference Result 1477 states and 1635 transitions. [2022-02-15 01:48:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 01:48:48,518 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9423076923076925) internal successors, (153), 51 states have internal predecessors, (153), 2 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) Word has length 161 [2022-02-15 01:48:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:48,519 INFO L225 Difference]: With dead ends: 1477 [2022-02-15 01:48:48,519 INFO L226 Difference]: Without dead ends: 1317 [2022-02-15 01:48:48,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 34 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:48:48,520 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:48,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 43 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:48:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-02-15 01:48:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1194. [2022-02-15 01:48:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1186 states have (on average 1.0860033726812817) internal successors, (1288), 1187 states have internal predecessors, (1288), 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) [2022-02-15 01:48:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1295 transitions. [2022-02-15 01:48:50,472 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1295 transitions. Word has length 161 [2022-02-15 01:48:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:50,472 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1295 transitions. [2022-02-15 01:48:50,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9423076923076925) internal successors, (153), 51 states have internal predecessors, (153), 2 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) [2022-02-15 01:48:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1295 transitions. [2022-02-15 01:48:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-15 01:48:50,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:50,474 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:50,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 01:48:50,474 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash 65005092, now seen corresponding path program 54 times [2022-02-15 01:48:50,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:50,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017793358] [2022-02-15 01:48:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:50,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:50,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:50,567 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:50,601 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:50,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:50,639 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:50,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:50,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:55,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:55,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017793358] [2022-02-15 01:48:55,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017793358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:55,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:55,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-15 01:48:55,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545685581] [2022-02-15 01:48:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:55,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-15 01:48:55,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:55,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-15 01:48:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=11631, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:48:55,232 INFO L87 Difference]: Start difference. First operand 1194 states and 1295 transitions. Second operand has 108 states, 108 states have (on average 1.4537037037037037) internal successors, (157), 106 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:49:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:49:03,148 INFO L93 Difference]: Finished difference Result 1475 states and 1634 transitions. [2022-02-15 01:49:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-02-15 01:49:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.4537037037037037) internal successors, (157), 106 states have internal predecessors, (157), 2 states have call successors, (3), 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 161 [2022-02-15 01:49:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:49:03,150 INFO L225 Difference]: With dead ends: 1475 [2022-02-15 01:49:03,150 INFO L226 Difference]: Without dead ends: 1317 [2022-02-15 01:49:03,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5010 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=802, Invalid=18658, Unknown=0, NotChecked=0, Total=19460 [2022-02-15 01:49:03,151 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 155 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 14591 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 14679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 14591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:49:03,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 93 Invalid, 14679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 14591 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-15 01:49:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-02-15 01:49:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1129. [2022-02-15 01:49:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1121 states have (on average 1.0909901873327386) internal successors, (1223), 1122 states have internal predecessors, (1223), 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) [2022-02-15 01:49:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1230 transitions. [2022-02-15 01:49:04,968 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1230 transitions. Word has length 161 [2022-02-15 01:49:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:49:04,968 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1230 transitions. [2022-02-15 01:49:04,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.4537037037037037) internal successors, (157), 106 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:49:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1230 transitions. [2022-02-15 01:49:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-02-15 01:49:04,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:49:04,970 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:49:04,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 01:49:04,970 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:49:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:49:04,970 INFO L85 PathProgramCache]: Analyzing trace with hash -668057849, now seen corresponding path program 55 times [2022-02-15 01:49:04,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:49:04,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949890778] [2022-02-15 01:49:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:49:05,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:05,055 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:05,055 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:49:05,101 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:05,137 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:05,137 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:49:05,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:49:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:49:05,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:49:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:49:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:49:09,030 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:49:09,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949890778] [2022-02-15 01:49:09,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [949890778] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:49:09,031 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:49:09,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-15 01:49:09,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039936903] [2022-02-15 01:49:09,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:49:09,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-15 01:49:09,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:49:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-15 01:49:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=11734, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:49:09,053 INFO L87 Difference]: Start difference. First operand 1129 states and 1230 transitions. Second operand has 110 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 108 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:49:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:49:19,531 INFO L93 Difference]: Finished difference Result 1506 states and 1668 transitions. [2022-02-15 01:49:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-02-15 01:49:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 108 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-02-15 01:49:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:49:19,533 INFO L225 Difference]: With dead ends: 1506 [2022-02-15 01:49:19,533 INFO L226 Difference]: Without dead ends: 1348 [2022-02-15 01:49:19,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6860 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=841, Invalid=25891, Unknown=0, NotChecked=0, Total=26732 [2022-02-15 01:49:19,534 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 299 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 19669 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 19885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 19669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:49:19,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 206 Invalid, 19885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 19669 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-02-15 01:49:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-02-15 01:49:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1200. [2022-02-15 01:49:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1192 states have (on average 1.087248322147651) internal successors, (1296), 1193 states have internal predecessors, (1296), 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) [2022-02-15 01:49:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1303 transitions. [2022-02-15 01:49:21,577 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1303 transitions. Word has length 164 [2022-02-15 01:49:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:49:21,577 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1303 transitions. [2022-02-15 01:49:21,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 108 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:49:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1303 transitions. [2022-02-15 01:49:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-02-15 01:49:21,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:49:21,579 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 46, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:49:21,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 01:49:21,579 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:49:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:49:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash -278203646, now seen corresponding path program 23 times [2022-02-15 01:49:21,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:49:21,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473450091] [2022-02-15 01:49:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:49:21,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:21,597 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:49:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:49:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:49:21,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:49:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:49:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:49:22,471 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:49:22,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473450091] [2022-02-15 01:49:22,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473450091] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:49:22,472 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:49:22,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 01:49:22,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314065588] [2022-02-15 01:49:22,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:49:22,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 01:49:22,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:49:22,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 01:49:22,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:49:22,473 INFO L87 Difference]: Start difference. First operand 1200 states and 1303 transitions. Second operand has 54 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 53 states have internal predecessors, (159), 2 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) [2022-02-15 01:49:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:49:25,444 INFO L93 Difference]: Finished difference Result 1574 states and 1738 transitions. [2022-02-15 01:49:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:49:25,444 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 53 states have internal predecessors, (159), 2 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) Word has length 167 [2022-02-15 01:49:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:49:25,446 INFO L225 Difference]: With dead ends: 1574 [2022-02-15 01:49:25,446 INFO L226 Difference]: Without dead ends: 1408 [2022-02-15 01:49:25,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 29 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2717 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:49:25,447 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 199 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:49:25,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 47 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:49:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-02-15 01:49:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1280. [2022-02-15 01:49:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1272 states have (on average 1.0833333333333333) internal successors, (1378), 1273 states have internal predecessors, (1378), 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) [2022-02-15 01:49:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1385 transitions. [2022-02-15 01:49:27,675 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1385 transitions. Word has length 167 [2022-02-15 01:49:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:49:27,675 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1385 transitions. [2022-02-15 01:49:27,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 53 states have internal predecessors, (159), 2 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) [2022-02-15 01:49:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1385 transitions. [2022-02-15 01:49:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-02-15 01:49:27,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:49:27,677 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:49:27,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 01:49:27,677 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:49:27,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:49:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash 562566980, now seen corresponding path program 56 times [2022-02-15 01:49:27,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:49:27,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891683283] [2022-02-15 01:49:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:49:27,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:27,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:27,753 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:49:27,800 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:27,837 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:27,837 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:49:27,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:49:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:49:27,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:49:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:49:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:49:33,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:49:33,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891683283] [2022-02-15 01:49:33,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1891683283] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:49:33,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:49:33,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-15 01:49:33,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730200508] [2022-02-15 01:49:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:49:33,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-15 01:49:33,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:49:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-15 01:49:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=12509, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 01:49:33,495 INFO L87 Difference]: Start difference. First operand 1280 states and 1385 transitions. Second operand has 112 states, 112 states have (on average 1.4553571428571428) internal successors, (163), 110 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:49:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:49:42,278 INFO L93 Difference]: Finished difference Result 1571 states and 1736 transitions. [2022-02-15 01:49:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-15 01:49:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.4553571428571428) internal successors, (163), 110 states have internal predecessors, (163), 2 states have call successors, (3), 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 167 [2022-02-15 01:49:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:49:42,280 INFO L225 Difference]: With dead ends: 1571 [2022-02-15 01:49:42,280 INFO L226 Difference]: Without dead ends: 1407 [2022-02-15 01:49:42,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5378 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=832, Invalid=20048, Unknown=0, NotChecked=0, Total=20880 [2022-02-15 01:49:42,281 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 155 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 15832 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 15922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 15832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:49:42,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 108 Invalid, 15922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 15832 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-15 01:49:42,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-02-15 01:49:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1212. [2022-02-15 01:49:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1204 states have (on average 1.0880398671096345) internal successors, (1310), 1205 states have internal predecessors, (1310), 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) [2022-02-15 01:49:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1317 transitions. [2022-02-15 01:49:44,362 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1317 transitions. Word has length 167 [2022-02-15 01:49:44,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:49:44,362 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1317 transitions. [2022-02-15 01:49:44,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.4553571428571428) internal successors, (163), 110 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:49:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1317 transitions. [2022-02-15 01:49:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-02-15 01:49:44,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:49:44,364 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:49:44,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 01:49:44,364 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:49:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:49:44,365 INFO L85 PathProgramCache]: Analyzing trace with hash 266009063, now seen corresponding path program 57 times [2022-02-15 01:49:44,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:49:44,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434977267] [2022-02-15 01:49:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:49:44,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:44,467 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:44,467 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:49:44,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:44,543 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:49:44,543 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:49:44,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:49:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:49:44,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:49:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:49:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:49:49,203 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:49:49,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434977267] [2022-02-15 01:49:49,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434977267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:49:49,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:49:49,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-15 01:49:49,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870902039] [2022-02-15 01:49:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:49:49,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-15 01:49:49,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:49:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-15 01:49:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=12615, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 01:49:49,205 INFO L87 Difference]: Start difference. First operand 1212 states and 1317 transitions. Second operand has 114 states, 114 states have (on average 1.456140350877193) internal successors, (166), 112 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:49:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:49:59,613 INFO L93 Difference]: Finished difference Result 1603 states and 1771 transitions. [2022-02-15 01:49:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-02-15 01:49:59,614 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.456140350877193) internal successors, (166), 112 states have internal predecessors, (166), 2 states have call successors, (3), 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 170 [2022-02-15 01:49:59,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:49:59,615 INFO L225 Difference]: With dead ends: 1603 [2022-02-15 01:49:59,615 INFO L226 Difference]: Without dead ends: 1439 [2022-02-15 01:49:59,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7496 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=874, Invalid=27856, Unknown=0, NotChecked=0, Total=28730 [2022-02-15 01:49:59,617 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 343 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 16944 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 17169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 16944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:49:59,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 81 Invalid, 17169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 16944 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-02-15 01:49:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2022-02-15 01:50:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1286. [2022-02-15 01:50:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1278 states have (on average 1.0845070422535212) internal successors, (1386), 1279 states have internal predecessors, (1386), 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) [2022-02-15 01:50:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1393 transitions. [2022-02-15 01:50:02,024 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1393 transitions. Word has length 170 [2022-02-15 01:50:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:50:02,024 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 1393 transitions. [2022-02-15 01:50:02,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.456140350877193) internal successors, (166), 112 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:50:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1393 transitions. [2022-02-15 01:50:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-02-15 01:50:02,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:50:02,026 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 48, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:50:02,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 01:50:02,026 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:50:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:50:02,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1108382694, now seen corresponding path program 24 times [2022-02-15 01:50:02,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:50:02,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206728656] [2022-02-15 01:50:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:50:02,047 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:02,047 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:50:02,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:50:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:50:02,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:50:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:50:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:50:03,168 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:50:03,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206728656] [2022-02-15 01:50:03,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206728656] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:50:03,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:50:03,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:50:03,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804887136] [2022-02-15 01:50:03,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:50:03,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:50:03,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:50:03,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:50:03,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:50:03,170 INFO L87 Difference]: Start difference. First operand 1286 states and 1393 transitions. Second operand has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 55 states have internal predecessors, (165), 2 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) [2022-02-15 01:50:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:50:06,524 INFO L93 Difference]: Finished difference Result 1674 states and 1844 transitions. [2022-02-15 01:50:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 01:50:06,525 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 55 states have internal predecessors, (165), 2 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) Word has length 173 [2022-02-15 01:50:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:50:06,529 INFO L225 Difference]: With dead ends: 1674 [2022-02-15 01:50:06,529 INFO L226 Difference]: Without dead ends: 1502 [2022-02-15 01:50:06,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 38 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:50:06,530 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:50:06,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 59 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:50:06,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-02-15 01:50:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1369. [2022-02-15 01:50:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1361 states have (on average 1.0808229243203527) internal successors, (1471), 1362 states have internal predecessors, (1471), 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) [2022-02-15 01:50:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1478 transitions. [2022-02-15 01:50:09,117 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1478 transitions. Word has length 173 [2022-02-15 01:50:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:50:09,117 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 1478 transitions. [2022-02-15 01:50:09,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 55 states have internal predecessors, (165), 2 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) [2022-02-15 01:50:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1478 transitions. [2022-02-15 01:50:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-02-15 01:50:09,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:50:09,119 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:50:09,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 01:50:09,120 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:50:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:50:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash 256831588, now seen corresponding path program 58 times [2022-02-15 01:50:09,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:50:09,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959193502] [2022-02-15 01:50:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:50:09,151 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:09,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:09,188 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:50:09,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:09,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:09,264 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:50:09,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:50:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:50:09,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:50:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:50:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:50:14,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:50:14,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959193502] [2022-02-15 01:50:14,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [959193502] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:50:14,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:50:14,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-15 01:50:14,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388872226] [2022-02-15 01:50:14,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:50:14,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-15 01:50:14,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:50:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-15 01:50:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=13419, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 01:50:14,838 INFO L87 Difference]: Start difference. First operand 1369 states and 1478 transitions. Second operand has 116 states, 116 states have (on average 1.456896551724138) internal successors, (169), 114 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:50:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:50:24,691 INFO L93 Difference]: Finished difference Result 1670 states and 1841 transitions. [2022-02-15 01:50:24,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-15 01:50:24,692 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.456896551724138) internal successors, (169), 114 states have internal predecessors, (169), 2 states have call successors, (3), 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 173 [2022-02-15 01:50:24,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:50:24,694 INFO L225 Difference]: With dead ends: 1670 [2022-02-15 01:50:24,694 INFO L226 Difference]: Without dead ends: 1500 [2022-02-15 01:50:24,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5759 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=862, Invalid=21488, Unknown=0, NotChecked=0, Total=22350 [2022-02-15 01:50:24,695 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 165 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 17693 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 17787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 17693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:50:24,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 173 Invalid, 17787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 17693 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-15 01:50:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2022-02-15 01:50:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1298. [2022-02-15 01:50:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1290 states have (on average 1.0852713178294573) internal successors, (1400), 1291 states have internal predecessors, (1400), 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) [2022-02-15 01:50:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1407 transitions. [2022-02-15 01:50:27,232 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1407 transitions. Word has length 173 [2022-02-15 01:50:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:50:27,232 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 1407 transitions. [2022-02-15 01:50:27,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.456896551724138) internal successors, (169), 114 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:50:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1407 transitions. [2022-02-15 01:50:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-02-15 01:50:27,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:50:27,234 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:50:27,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 01:50:27,234 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:50:27,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:50:27,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1728580807, now seen corresponding path program 59 times [2022-02-15 01:50:27,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:50:27,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358987154] [2022-02-15 01:50:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:50:27,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:27,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:27,309 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:50:27,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:27,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:27,370 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:50:27,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:50:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:50:27,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:50:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:50:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:50:33,093 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:50:33,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358987154] [2022-02-15 01:50:33,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358987154] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:50:33,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:50:33,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-02-15 01:50:33,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709626210] [2022-02-15 01:50:33,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:50:33,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-02-15 01:50:33,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:50:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-02-15 01:50:33,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=13885, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 01:50:33,096 INFO L87 Difference]: Start difference. First operand 1298 states and 1407 transitions. Second operand has 118 states, 118 states have (on average 1.4576271186440677) internal successors, (172), 116 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:50:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:50:42,947 INFO L93 Difference]: Finished difference Result 1674 states and 1846 transitions. [2022-02-15 01:50:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-15 01:50:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.4576271186440677) internal successors, (172), 116 states have internal predecessors, (172), 2 states have call successors, (3), 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 176 [2022-02-15 01:50:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:50:42,950 INFO L225 Difference]: With dead ends: 1674 [2022-02-15 01:50:42,950 INFO L226 Difference]: Without dead ends: 1504 [2022-02-15 01:50:42,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5997 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=882, Invalid=22374, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 01:50:42,952 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 17942 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 18038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 17942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:50:42,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 133 Invalid, 18038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 17942 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-15 01:50:42,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-02-15 01:50:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1301. [2022-02-15 01:50:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1293 states have (on average 1.0850734725444702) internal successors, (1403), 1294 states have internal predecessors, (1403), 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) [2022-02-15 01:50:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1410 transitions. [2022-02-15 01:50:45,344 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1410 transitions. Word has length 176 [2022-02-15 01:50:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:50:45,344 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 1410 transitions. [2022-02-15 01:50:45,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.4576271186440677) internal successors, (172), 116 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:50:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1410 transitions. [2022-02-15 01:50:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-02-15 01:50:45,346 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:50:45,346 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:50:45,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 01:50:45,346 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:50:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:50:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1332967549, now seen corresponding path program 60 times [2022-02-15 01:50:45,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:50:45,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141298282] [2022-02-15 01:50:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:50:45,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:45,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:45,411 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:50:45,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:45,484 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:50:45,485 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:50:45,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:50:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:50:45,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:50:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:50:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:50:50,759 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:50:50,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141298282] [2022-02-15 01:50:50,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1141298282] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:50:50,759 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:50:50,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-15 01:50:50,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171257688] [2022-02-15 01:50:50,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:50:50,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-15 01:50:50,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:50:50,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-15 01:50:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=14115, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 01:50:50,761 INFO L87 Difference]: Start difference. First operand 1301 states and 1410 transitions. Second operand has 119 states, 119 states have (on average 1.4453781512605042) internal successors, (172), 117 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:51:03,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:51:03,192 INFO L93 Difference]: Finished difference Result 1701 states and 1874 transitions. [2022-02-15 01:51:03,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-15 01:51:03,192 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.4453781512605042) internal successors, (172), 117 states have internal predecessors, (172), 2 states have call successors, (3), 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 176 [2022-02-15 01:51:03,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:51:03,194 INFO L225 Difference]: With dead ends: 1701 [2022-02-15 01:51:03,194 INFO L226 Difference]: Without dead ends: 1531 [2022-02-15 01:51:03,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8879 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1105, Invalid=31115, Unknown=0, NotChecked=0, Total=32220 [2022-02-15 01:51:03,197 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 185 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 21302 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 21471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 21302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:51:03,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 129 Invalid, 21471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 21302 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-02-15 01:51:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-02-15 01:51:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1301. [2022-02-15 01:51:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1293 states have (on average 1.08584686774942) internal successors, (1404), 1294 states have internal predecessors, (1404), 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) [2022-02-15 01:51:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1411 transitions. [2022-02-15 01:51:05,731 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1411 transitions. Word has length 176 [2022-02-15 01:51:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:51:05,731 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 1411 transitions. [2022-02-15 01:51:05,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.4453781512605042) internal successors, (172), 117 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:51:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1411 transitions. [2022-02-15 01:51:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-02-15 01:51:05,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:51:05,733 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 50, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:51:05,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 01:51:05,733 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:51:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:51:05,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1770587842, now seen corresponding path program 25 times [2022-02-15 01:51:05,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:51:05,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868035429] [2022-02-15 01:51:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:51:05,754 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:05,754 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:51:05,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:51:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:51:06,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:51:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:51:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:51:06,965 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:51:06,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868035429] [2022-02-15 01:51:06,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [868035429] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:51:06,965 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:51:06,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-15 01:51:06,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736903203] [2022-02-15 01:51:06,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:51:06,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 01:51:06,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:51:06,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 01:51:06,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:51:06,967 INFO L87 Difference]: Start difference. First operand 1301 states and 1411 transitions. Second operand has 58 states, 58 states have (on average 2.9482758620689653) internal successors, (171), 57 states have internal predecessors, (171), 2 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) [2022-02-15 01:51:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:51:10,753 INFO L93 Difference]: Finished difference Result 1774 states and 1949 transitions. [2022-02-15 01:51:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 01:51:10,754 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9482758620689653) internal successors, (171), 57 states have internal predecessors, (171), 2 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) Word has length 179 [2022-02-15 01:51:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:51:10,755 INFO L225 Difference]: With dead ends: 1774 [2022-02-15 01:51:10,755 INFO L226 Difference]: Without dead ends: 1596 [2022-02-15 01:51:10,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 32 SyntacticMatches, 38 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3522 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:51:10,756 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:51:10,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 49 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:51:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2022-02-15 01:51:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1384. [2022-02-15 01:51:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1376 states have (on average 1.0821220930232558) internal successors, (1489), 1377 states have internal predecessors, (1489), 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) [2022-02-15 01:51:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1496 transitions. [2022-02-15 01:51:13,433 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1496 transitions. Word has length 179 [2022-02-15 01:51:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:51:13,433 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 1496 transitions. [2022-02-15 01:51:13,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9482758620689653) internal successors, (171), 57 states have internal predecessors, (171), 2 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) [2022-02-15 01:51:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1496 transitions. [2022-02-15 01:51:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-02-15 01:51:13,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:51:13,435 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:51:13,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 01:51:13,436 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:51:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:51:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash -711560828, now seen corresponding path program 61 times [2022-02-15 01:51:13,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:51:13,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602107413] [2022-02-15 01:51:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:51:13,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:13,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:13,546 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:51:13,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:13,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:13,621 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:51:13,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:51:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:51:13,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:51:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:51:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:51:17,810 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:51:17,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602107413] [2022-02-15 01:51:17,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [602107413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:51:17,810 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:51:17,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-15 01:51:17,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490443719] [2022-02-15 01:51:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:51:17,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-15 01:51:17,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:51:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-15 01:51:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=13999, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 01:51:17,812 INFO L87 Difference]: Start difference. First operand 1384 states and 1496 transitions. Second operand has 120 states, 120 states have (on average 1.4583333333333333) internal successors, (175), 118 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:51:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:51:30,589 INFO L93 Difference]: Finished difference Result 1799 states and 1977 transitions. [2022-02-15 01:51:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-02-15 01:51:30,589 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.4583333333333333) internal successors, (175), 118 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-02-15 01:51:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:51:30,591 INFO L225 Difference]: With dead ends: 1799 [2022-02-15 01:51:30,591 INFO L226 Difference]: Without dead ends: 1623 [2022-02-15 01:51:30,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8230 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=921, Invalid=30941, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 01:51:30,592 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 292 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 23939 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 24174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 23939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:51:30,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 283 Invalid, 24174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 23939 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-02-15 01:51:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-02-15 01:51:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1464. [2022-02-15 01:51:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1456 states have (on average 1.0789835164835164) internal successors, (1571), 1457 states have internal predecessors, (1571), 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) [2022-02-15 01:51:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1578 transitions. [2022-02-15 01:51:33,635 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1578 transitions. Word has length 179 [2022-02-15 01:51:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:51:33,635 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 1578 transitions. [2022-02-15 01:51:33,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.4583333333333333) internal successors, (175), 118 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:51:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1578 transitions. [2022-02-15 01:51:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-15 01:51:33,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:51:33,637 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:51:33,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 01:51:33,637 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:51:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:51:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1645442983, now seen corresponding path program 62 times [2022-02-15 01:51:33,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:51:33,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877859294] [2022-02-15 01:51:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:51:33,680 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:33,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:33,712 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:51:33,751 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:33,784 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:33,784 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:51:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:51:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:51:33,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:51:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:51:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:51:39,692 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:51:39,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877859294] [2022-02-15 01:51:39,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877859294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:51:39,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:51:39,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-02-15 01:51:39,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368022287] [2022-02-15 01:51:39,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:51:39,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-02-15 01:51:39,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:51:39,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-02-15 01:51:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=14844, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 01:51:39,694 INFO L87 Difference]: Start difference. First operand 1464 states and 1578 transitions. Second operand has 122 states, 122 states have (on average 1.459016393442623) internal successors, (178), 120 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:51:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:51:50,630 INFO L93 Difference]: Finished difference Result 1779 states and 1958 transitions. [2022-02-15 01:51:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-02-15 01:51:50,630 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.459016393442623) internal successors, (178), 120 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-02-15 01:51:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:51:50,632 INFO L225 Difference]: With dead ends: 1779 [2022-02-15 01:51:50,632 INFO L226 Difference]: Without dead ends: 1603 [2022-02-15 01:51:50,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6399 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=911, Invalid=23895, Unknown=0, NotChecked=0, Total=24806 [2022-02-15 01:51:50,633 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 170 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 21632 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 21732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 21632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:51:50,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 358 Invalid, 21732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 21632 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-02-15 01:51:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2022-02-15 01:51:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1390. [2022-02-15 01:51:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1382 states have (on average 1.0832127351664256) internal successors, (1497), 1383 states have internal predecessors, (1497), 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) [2022-02-15 01:51:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1504 transitions. [2022-02-15 01:51:53,368 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1504 transitions. Word has length 182 [2022-02-15 01:51:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:51:53,368 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 1504 transitions. [2022-02-15 01:51:53,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.459016393442623) internal successors, (178), 120 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:51:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1504 transitions. [2022-02-15 01:51:53,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-02-15 01:51:53,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:51:53,370 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 52, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:51:53,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 01:51:53,370 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:51:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:51:53,370 INFO L85 PathProgramCache]: Analyzing trace with hash -35253082, now seen corresponding path program 26 times [2022-02-15 01:51:53,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:51:53,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713379636] [2022-02-15 01:51:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:51:53,387 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:51:53,387 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:51:53,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:51:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:51:53,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:51:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:51:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:51:54,528 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:51:54,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713379636] [2022-02-15 01:51:54,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713379636] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:51:54,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:51:54,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-15 01:51:54,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998738101] [2022-02-15 01:51:54,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:51:54,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 01:51:54,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:51:54,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 01:51:54,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:51:54,530 INFO L87 Difference]: Start difference. First operand 1390 states and 1504 transitions. Second operand has 60 states, 60 states have (on average 2.95) internal successors, (177), 59 states have internal predecessors, (177), 2 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) [2022-02-15 01:51:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:51:58,670 INFO L93 Difference]: Finished difference Result 1880 states and 2061 transitions. [2022-02-15 01:51:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:51:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.95) internal successors, (177), 59 states have internal predecessors, (177), 2 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) Word has length 185 [2022-02-15 01:51:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:51:58,673 INFO L225 Difference]: With dead ends: 1880 [2022-02-15 01:51:58,673 INFO L226 Difference]: Without dead ends: 1696 [2022-02-15 01:51:58,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 35 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3490 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:51:58,673 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 204 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1820 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:51:58,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 48 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1820 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:51:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-02-15 01:52:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1476. [2022-02-15 01:52:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1468 states have (on average 1.0797002724795641) internal successors, (1585), 1469 states have internal predecessors, (1585), 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) [2022-02-15 01:52:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1592 transitions. [2022-02-15 01:52:01,737 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1592 transitions. Word has length 185 [2022-02-15 01:52:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:52:01,737 INFO L470 AbstractCegarLoop]: Abstraction has 1476 states and 1592 transitions. [2022-02-15 01:52:01,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.95) internal successors, (177), 59 states have internal predecessors, (177), 2 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) [2022-02-15 01:52:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1592 transitions. [2022-02-15 01:52:01,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-02-15 01:52:01,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:52:01,739 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:52:01,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 01:52:01,739 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:52:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:52:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash 725654180, now seen corresponding path program 63 times [2022-02-15 01:52:01,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:52:01,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786904206] [2022-02-15 01:52:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:52:01,797 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:01,838 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:01,838 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:52:01,886 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:01,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:01,922 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:52:01,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:52:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:52:02,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:52:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:52:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:52:08,571 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:52:08,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786904206] [2022-02-15 01:52:08,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786904206] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:52:08,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:52:08,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-15 01:52:08,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816982376] [2022-02-15 01:52:08,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:52:08,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-15 01:52:08,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:52:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-15 01:52:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=15334, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 01:52:08,573 INFO L87 Difference]: Start difference. First operand 1476 states and 1592 transitions. Second operand has 124 states, 124 states have (on average 1.4596774193548387) internal successors, (181), 122 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:52:20,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:52:20,345 INFO L93 Difference]: Finished difference Result 1874 states and 2056 transitions. [2022-02-15 01:52:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-15 01:52:20,345 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.4596774193548387) internal successors, (181), 122 states have internal predecessors, (181), 2 states have call successors, (3), 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 185 [2022-02-15 01:52:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:52:20,347 INFO L225 Difference]: With dead ends: 1874 [2022-02-15 01:52:20,347 INFO L226 Difference]: Without dead ends: 1692 [2022-02-15 01:52:20,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6560 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=923, Invalid=24517, Unknown=0, NotChecked=0, Total=25440 [2022-02-15 01:52:20,349 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 175 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 21752 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 21852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 21752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:52:20,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 288 Invalid, 21852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 21752 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-02-15 01:52:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-02-15 01:52:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1479. [2022-02-15 01:52:23,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1471 states have (on average 1.079537729435758) internal successors, (1588), 1472 states have internal predecessors, (1588), 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) [2022-02-15 01:52:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1595 transitions. [2022-02-15 01:52:23,535 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1595 transitions. Word has length 185 [2022-02-15 01:52:23,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:52:23,536 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 1595 transitions. [2022-02-15 01:52:23,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.4596774193548387) internal successors, (181), 122 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:52:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1595 transitions. [2022-02-15 01:52:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-02-15 01:52:23,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:52:23,538 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:52:23,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 01:52:23,538 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:52:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:52:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1139510424, now seen corresponding path program 64 times [2022-02-15 01:52:23,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:52:23,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666670906] [2022-02-15 01:52:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:52:23,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:23,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:23,627 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:52:23,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:23,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:23,706 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:52:23,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:52:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:52:23,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:52:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:52:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:52:29,030 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:52:29,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666670906] [2022-02-15 01:52:29,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1666670906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:52:29,030 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:52:29,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-02-15 01:52:29,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145860404] [2022-02-15 01:52:29,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:52:29,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-02-15 01:52:29,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:52:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-02-15 01:52:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=15199, Unknown=0, NotChecked=0, Total=15750 [2022-02-15 01:52:29,032 INFO L87 Difference]: Start difference. First operand 1479 states and 1595 transitions. Second operand has 125 states, 125 states have (on average 1.448) internal successors, (181), 123 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:52:41,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:52:41,978 INFO L93 Difference]: Finished difference Result 1907 states and 2091 transitions. [2022-02-15 01:52:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-02-15 01:52:41,978 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.448) internal successors, (181), 123 states have internal predecessors, (181), 2 states have call successors, (3), 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 185 [2022-02-15 01:52:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:52:41,981 INFO L225 Difference]: With dead ends: 1907 [2022-02-15 01:52:41,981 INFO L226 Difference]: Without dead ends: 1725 [2022-02-15 01:52:41,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9428 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1038, Invalid=34118, Unknown=0, NotChecked=0, Total=35156 [2022-02-15 01:52:41,983 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 329 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 22881 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 23122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 22881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:52:41,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 211 Invalid, 23122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 22881 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-15 01:52:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-02-15 01:52:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1479. [2022-02-15 01:52:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1471 states have (on average 1.0802175390890552) internal successors, (1589), 1472 states have internal predecessors, (1589), 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) [2022-02-15 01:52:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1596 transitions. [2022-02-15 01:52:45,149 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1596 transitions. Word has length 185 [2022-02-15 01:52:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:52:45,149 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 1596 transitions. [2022-02-15 01:52:45,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.448) internal successors, (181), 123 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:52:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1596 transitions. [2022-02-15 01:52:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-02-15 01:52:45,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:52:45,151 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:52:45,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 01:52:45,152 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:52:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:52:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1188772487, now seen corresponding path program 65 times [2022-02-15 01:52:45,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:52:45,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447023447] [2022-02-15 01:52:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:52:45,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:45,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:45,230 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:52:45,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:45,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:52:45,299 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:52:45,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:52:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:52:45,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:52:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:52:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:52:49,859 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:52:49,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447023447] [2022-02-15 01:52:49,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447023447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:52:49,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:52:49,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-15 01:52:49,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302266389] [2022-02-15 01:52:49,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:52:49,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-15 01:52:49,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:52:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-15 01:52:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=15454, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 01:52:49,864 INFO L87 Difference]: Start difference. First operand 1479 states and 1596 transitions. Second operand has 126 states, 126 states have (on average 1.4603174603174602) internal successors, (184), 124 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:04,977 INFO L93 Difference]: Finished difference Result 1912 states and 2098 transitions. [2022-02-15 01:53:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-15 01:53:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.4603174603174602) internal successors, (184), 124 states have internal predecessors, (184), 2 states have call successors, (3), 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 188 [2022-02-15 01:53:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:04,979 INFO L225 Difference]: With dead ends: 1912 [2022-02-15 01:53:04,979 INFO L226 Difference]: Without dead ends: 1730 [2022-02-15 01:53:04,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=969, Invalid=34187, Unknown=0, NotChecked=0, Total=35156 [2022-02-15 01:53:04,981 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 261 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 26979 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 27226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 26979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:04,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 442 Invalid, 27226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 26979 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-02-15 01:53:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2022-02-15 01:53:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1562. [2022-02-15 01:53:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1554 states have (on average 1.0772200772200773) internal successors, (1674), 1555 states have internal predecessors, (1674), 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) [2022-02-15 01:53:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 1681 transitions. [2022-02-15 01:53:08,479 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 1681 transitions. Word has length 188 [2022-02-15 01:53:08,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:08,479 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 1681 transitions. [2022-02-15 01:53:08,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.4603174603174602) internal successors, (184), 124 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 1681 transitions. [2022-02-15 01:53:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-02-15 01:53:08,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:08,482 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 54, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:08,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 01:53:08,482 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:08,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1134519678, now seen corresponding path program 27 times [2022-02-15 01:53:08,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:08,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213430208] [2022-02-15 01:53:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:08,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:08,499 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:53:08,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:08,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:09,701 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:09,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213430208] [2022-02-15 01:53:09,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213430208] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:09,702 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:09,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:53:09,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071514204] [2022-02-15 01:53:09,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:09,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:53:09,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:53:09,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:53:09,703 INFO L87 Difference]: Start difference. First operand 1562 states and 1681 transitions. Second operand has 62 states, 62 states have (on average 2.9516129032258065) internal successors, (183), 61 states have internal predecessors, (183), 2 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) [2022-02-15 01:53:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:14,365 INFO L93 Difference]: Finished difference Result 1992 states and 2180 transitions. [2022-02-15 01:53:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 01:53:14,366 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.9516129032258065) internal successors, (183), 61 states have internal predecessors, (183), 2 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) Word has length 191 [2022-02-15 01:53:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:14,368 INFO L225 Difference]: With dead ends: 1992 [2022-02-15 01:53:14,368 INFO L226 Difference]: Without dead ends: 1802 [2022-02-15 01:53:14,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 35 SyntacticMatches, 39 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:53:14,368 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 213 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:14,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 52 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:53:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-02-15 01:53:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1654. [2022-02-15 01:53:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1646 states have (on average 1.0741190765492101) internal successors, (1768), 1647 states have internal predecessors, (1768), 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) [2022-02-15 01:53:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1775 transitions. [2022-02-15 01:53:18,032 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1775 transitions. Word has length 191 [2022-02-15 01:53:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:18,032 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 1775 transitions. [2022-02-15 01:53:18,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.9516129032258065) internal successors, (183), 61 states have internal predecessors, (183), 2 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) [2022-02-15 01:53:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1775 transitions. [2022-02-15 01:53:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-02-15 01:53:18,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:18,034 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:18,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 01:53:18,034 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1783665724, now seen corresponding path program 66 times [2022-02-15 01:53:18,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:18,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414434914] [2022-02-15 01:53:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:18,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:18,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:18,122 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:53:18,168 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:18,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:18,206 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:53:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:22,730 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:22,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414434914] [2022-02-15 01:53:22,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1414434914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:22,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:22,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-02-15 01:53:22,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277527587] [2022-02-15 01:53:22,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:22,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-02-15 01:53:22,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:22,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-02-15 01:53:22,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=15955, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:53:22,732 INFO L87 Difference]: Start difference. First operand 1654 states and 1775 transitions. Second operand has 128 states, 128 states have (on average 1.4609375) internal successors, (187), 126 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:36,242 INFO L93 Difference]: Finished difference Result 1923 states and 2082 transitions. [2022-02-15 01:53:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-02-15 01:53:36,242 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.4609375) internal successors, (187), 126 states have internal predecessors, (187), 2 states have call successors, (3), 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 191 [2022-02-15 01:53:36,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:36,244 INFO L225 Difference]: With dead ends: 1923 [2022-02-15 01:53:36,244 INFO L226 Difference]: Without dead ends: 1735 [2022-02-15 01:53:36,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9416 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=985, Invalid=35305, Unknown=0, NotChecked=0, Total=36290 [2022-02-15 01:53:36,246 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 385 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 24441 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 24691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 24441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:36,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 64 Invalid, 24691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 24441 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-02-15 01:53:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2022-02-15 01:53:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1657. [2022-02-15 01:53:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1649 states have (on average 1.0745906610066707) internal successors, (1772), 1650 states have internal predecessors, (1772), 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) [2022-02-15 01:53:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 1779 transitions. [2022-02-15 01:53:40,042 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 1779 transitions. Word has length 191 [2022-02-15 01:53:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:40,042 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 1779 transitions. [2022-02-15 01:53:40,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.4609375) internal successors, (187), 126 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 1779 transitions. [2022-02-15 01:53:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-02-15 01:53:40,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:40,045 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:40,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-15 01:53:40,045 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:40,045 INFO L85 PathProgramCache]: Analyzing trace with hash -54700697, now seen corresponding path program 67 times [2022-02-15 01:53:40,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:40,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741265761] [2022-02-15 01:53:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:40,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:40,143 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:40,143 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:53:40,190 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:40,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:40,227 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:53:40,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:40,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:44,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:44,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741265761] [2022-02-15 01:53:44,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [741265761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:44,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:44,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-02-15 01:53:44,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008964252] [2022-02-15 01:53:44,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:44,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-02-15 01:53:44,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-02-15 01:53:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=16464, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 01:53:44,969 INFO L87 Difference]: Start difference. First operand 1657 states and 1779 transitions. Second operand has 130 states, 130 states have (on average 1.4615384615384615) internal successors, (190), 128 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:59,696 INFO L93 Difference]: Finished difference Result 1927 states and 2087 transitions. [2022-02-15 01:53:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-02-15 01:53:59,697 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.4615384615384615) internal successors, (190), 128 states have internal predecessors, (190), 2 states have call successors, (3), 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 194 [2022-02-15 01:53:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:59,699 INFO L225 Difference]: With dead ends: 1927 [2022-02-15 01:53:59,699 INFO L226 Difference]: Without dead ends: 1739 [2022-02-15 01:53:59,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9725 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1001, Invalid=36441, Unknown=0, NotChecked=0, Total=37442 [2022-02-15 01:53:59,701 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 361 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 25253 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 25508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 25253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:59,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 166 Invalid, 25508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 25253 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-02-15 01:53:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-02-15 01:54:03,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1660. [2022-02-15 01:54:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1652 states have (on average 1.0750605326876512) internal successors, (1776), 1653 states have internal predecessors, (1776), 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) [2022-02-15 01:54:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 1783 transitions. [2022-02-15 01:54:03,511 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 1783 transitions. Word has length 194 [2022-02-15 01:54:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:03,511 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 1783 transitions. [2022-02-15 01:54:03,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.4615384615384615) internal successors, (190), 128 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 1783 transitions. [2022-02-15 01:54:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-02-15 01:54:03,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:03,514 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 56, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:03,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-15 01:54:03,514 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash 766727526, now seen corresponding path program 28 times [2022-02-15 01:54:03,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:03,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015289277] [2022-02-15 01:54:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:03,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:54:03,533 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:54:03,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:03,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:04,551 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:04,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015289277] [2022-02-15 01:54:04,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015289277] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:04,552 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:04,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-15 01:54:04,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697404021] [2022-02-15 01:54:04,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:04,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-15 01:54:04,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-15 01:54:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:54:04,553 INFO L87 Difference]: Start difference. First operand 1660 states and 1783 transitions. Second operand has 64 states, 64 states have (on average 2.953125) internal successors, (189), 63 states have internal predecessors, (189), 2 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) [2022-02-15 01:54:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:09,729 INFO L93 Difference]: Finished difference Result 2104 states and 2298 transitions. [2022-02-15 01:54:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 01:54:09,730 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.953125) internal successors, (189), 63 states have internal predecessors, (189), 2 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) Word has length 197 [2022-02-15 01:54:09,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:09,731 INFO L225 Difference]: With dead ends: 2104 [2022-02-15 01:54:09,732 INFO L226 Difference]: Without dead ends: 1908 [2022-02-15 01:54:09,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 32 SyntacticMatches, 44 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:54:09,732 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 221 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:09,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 48 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:54:09,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2022-02-15 01:54:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1755. [2022-02-15 01:54:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1747 states have (on average 1.072123640526617) internal successors, (1873), 1748 states have internal predecessors, (1873), 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) [2022-02-15 01:54:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 1880 transitions. [2022-02-15 01:54:13,753 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 1880 transitions. Word has length 197 [2022-02-15 01:54:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:13,754 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 1880 transitions. [2022-02-15 01:54:13,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.953125) internal successors, (189), 63 states have internal predecessors, (189), 2 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) [2022-02-15 01:54:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 1880 transitions. [2022-02-15 01:54:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-02-15 01:54:13,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:13,756 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:13,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-15 01:54:13,756 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:13,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2000362268, now seen corresponding path program 68 times [2022-02-15 01:54:13,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:13,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91669639] [2022-02-15 01:54:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:13,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:54:13,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:54:13,844 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:54:13,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:54:13,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:54:13,964 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:54:13,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:14,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:19,993 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:19,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91669639] [2022-02-15 01:54:19,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [91669639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:19,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:19,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-15 01:54:19,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120788618] [2022-02-15 01:54:19,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:19,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-15 01:54:20,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-15 01:54:20,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=17379, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:54:20,008 INFO L87 Difference]: Start difference. First operand 1755 states and 1880 transitions. Second operand has 132 states, 132 states have (on average 1.4621212121212122) internal successors, (193), 130 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:33,377 INFO L93 Difference]: Finished difference Result 2096 states and 2291 transitions. [2022-02-15 01:54:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-02-15 01:54:33,377 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.4621212121212122) internal successors, (193), 130 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-02-15 01:54:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:33,379 INFO L225 Difference]: With dead ends: 2096 [2022-02-15 01:54:33,379 INFO L226 Difference]: Without dead ends: 1902 [2022-02-15 01:54:33,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7413 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=982, Invalid=27748, Unknown=0, NotChecked=0, Total=28730 [2022-02-15 01:54:33,381 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 181 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 22133 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 22238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 22133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:33,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 88 Invalid, 22238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 22133 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-15 01:54:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-02-15 01:54:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1672. [2022-02-15 01:54:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1664 states have (on average 1.0757211538461537) internal successors, (1790), 1665 states have internal predecessors, (1790), 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) [2022-02-15 01:54:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 1797 transitions. [2022-02-15 01:54:37,326 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 1797 transitions. Word has length 197 [2022-02-15 01:54:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:37,326 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 1797 transitions. [2022-02-15 01:54:37,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.4621212121212122) internal successors, (193), 130 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 1797 transitions. [2022-02-15 01:54:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-02-15 01:54:37,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:37,328 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:37,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-15 01:54:37,328 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:37,328 INFO L85 PathProgramCache]: Analyzing trace with hash -325597113, now seen corresponding path program 69 times [2022-02-15 01:54:37,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:37,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783961279] [2022-02-15 01:54:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:37,371 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:54:37,402 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:54:37,402 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:54:37,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:54:37,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:54:37,472 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:54:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:37,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:42,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:42,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783961279] [2022-02-15 01:54:42,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1783961279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:42,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:42,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-15 01:54:42,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442030725] [2022-02-15 01:54:42,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:42,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-15 01:54:42,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:42,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-15 01:54:42,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=17506, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:54:42,738 INFO L87 Difference]: Start difference. First operand 1672 states and 1797 transitions. Second operand has 134 states, 134 states have (on average 1.462686567164179) internal successors, (196), 132 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:59,701 INFO L93 Difference]: Finished difference Result 2133 states and 2331 transitions. [2022-02-15 01:54:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-02-15 01:54:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.462686567164179) internal successors, (196), 132 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-02-15 01:54:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:59,703 INFO L225 Difference]: With dead ends: 2133 [2022-02-15 01:54:59,703 INFO L226 Difference]: Without dead ends: 1939 [2022-02-15 01:54:59,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10358 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1033, Invalid=38767, Unknown=0, NotChecked=0, Total=39800 [2022-02-15 01:54:59,706 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 230 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 32036 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 32297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 32036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:59,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 493 Invalid, 32297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 32036 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-02-15 01:54:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-02-15 01:55:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1761. [2022-02-15 01:55:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1753 states have (on average 1.0730176839703365) internal successors, (1881), 1754 states have internal predecessors, (1881), 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) [2022-02-15 01:55:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 1888 transitions. [2022-02-15 01:55:03,844 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 1888 transitions. Word has length 200 [2022-02-15 01:55:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:03,845 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 1888 transitions. [2022-02-15 01:55:03,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.462686567164179) internal successors, (196), 132 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 1888 transitions. [2022-02-15 01:55:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-02-15 01:55:03,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:03,847 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 58, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:03,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-15 01:55:03,847 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:03,847 INFO L85 PathProgramCache]: Analyzing trace with hash -967201214, now seen corresponding path program 29 times [2022-02-15 01:55:03,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:03,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975648173] [2022-02-15 01:55:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:03,866 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:55:03,866 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:55:03,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:04,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:05,091 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:05,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975648173] [2022-02-15 01:55:05,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [975648173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:05,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:05,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-15 01:55:05,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071302928] [2022-02-15 01:55:05,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:05,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-15 01:55:05,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:05,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-15 01:55:05,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:55:05,093 INFO L87 Difference]: Start difference. First operand 1761 states and 1888 transitions. Second operand has 66 states, 66 states have (on average 2.9545454545454546) internal successors, (195), 65 states have internal predecessors, (195), 2 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) [2022-02-15 01:55:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:10,708 INFO L93 Difference]: Finished difference Result 2219 states and 2419 transitions. [2022-02-15 01:55:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:55:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9545454545454546) internal successors, (195), 65 states have internal predecessors, (195), 2 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) Word has length 203 [2022-02-15 01:55:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:10,711 INFO L225 Difference]: With dead ends: 2219 [2022-02-15 01:55:10,711 INFO L226 Difference]: Without dead ends: 2017 [2022-02-15 01:55:10,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 37 SyntacticMatches, 41 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4481 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:55:10,712 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:10,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 49 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:55:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-02-15 01:55:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1859. [2022-02-15 01:55:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1851 states have (on average 1.0702323068611561) internal successors, (1981), 1852 states have internal predecessors, (1981), 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) [2022-02-15 01:55:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 1988 transitions. [2022-02-15 01:55:15,257 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 1988 transitions. Word has length 203 [2022-02-15 01:55:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:15,257 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 1988 transitions. [2022-02-15 01:55:15,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9545454545454546) internal successors, (195), 65 states have internal predecessors, (195), 2 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) [2022-02-15 01:55:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 1988 transitions. [2022-02-15 01:55:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-02-15 01:55:15,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:15,260 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:15,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-15 01:55:15,260 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2031942140, now seen corresponding path program 70 times [2022-02-15 01:55:15,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:15,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299522455] [2022-02-15 01:55:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:15,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:55:15,339 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:55:15,339 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:55:15,387 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:55:15,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:55:15,424 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:55:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:15,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:21,752 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:21,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299522455] [2022-02-15 01:55:21,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [299522455] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:21,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:21,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-02-15 01:55:21,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549961783] [2022-02-15 01:55:21,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:21,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-02-15 01:55:21,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-02-15 01:55:21,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=18039, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 01:55:21,755 INFO L87 Difference]: Start difference. First operand 1859 states and 1988 transitions. Second operand has 136 states, 136 states have (on average 1.463235294117647) internal successors, (199), 134 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:38,834 INFO L93 Difference]: Finished difference Result 2144 states and 2313 transitions. [2022-02-15 01:55:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-02-15 01:55:38,834 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.463235294117647) internal successors, (199), 134 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-02-15 01:55:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:38,836 INFO L225 Difference]: With dead ends: 2144 [2022-02-15 01:55:38,836 INFO L226 Difference]: Without dead ends: 1944 [2022-02-15 01:55:38,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10682 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1049, Invalid=39957, Unknown=0, NotChecked=0, Total=41006 [2022-02-15 01:55:38,838 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 337 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 30874 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 31140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 30874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:38,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 335 Invalid, 31140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 30874 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-02-15 01:55:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-02-15 01:55:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1862. [2022-02-15 01:55:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1854 states have (on average 1.070658036677454) internal successors, (1985), 1855 states have internal predecessors, (1985), 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) [2022-02-15 01:55:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 1992 transitions. [2022-02-15 01:55:43,356 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 1992 transitions. Word has length 203 [2022-02-15 01:55:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:43,356 INFO L470 AbstractCegarLoop]: Abstraction has 1862 states and 1992 transitions. [2022-02-15 01:55:43,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.463235294117647) internal successors, (199), 134 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 1992 transitions. [2022-02-15 01:55:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-02-15 01:55:43,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:43,360 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:43,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-15 01:55:43,360 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:43,360 INFO L85 PathProgramCache]: Analyzing trace with hash -523726041, now seen corresponding path program 71 times [2022-02-15 01:55:43,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:43,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808726452] [2022-02-15 01:55:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:43,403 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:55:43,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:55:43,435 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:55:43,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:55:43,500 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:55:43,500 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:55:43,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:43,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:51,441 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:51,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808726452] [2022-02-15 01:55:51,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1808726452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:51,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:51,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-02-15 01:55:51,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743887815] [2022-02-15 01:55:51,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:51,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-02-15 01:55:51,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-02-15 01:55:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=18996, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:55:51,443 INFO L87 Difference]: Start difference. First operand 1862 states and 1992 transitions. Second operand has 138 states, 138 states have (on average 1.463768115942029) internal successors, (202), 136 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:07,453 INFO L93 Difference]: Finished difference Result 2217 states and 2420 transitions. [2022-02-15 01:56:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-15 01:56:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.463768115942029) internal successors, (202), 136 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-02-15 01:56:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:07,455 INFO L225 Difference]: With dead ends: 2217 [2022-02-15 01:56:07,455 INFO L226 Difference]: Without dead ends: 2017 [2022-02-15 01:56:07,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8137 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1031, Invalid=30475, Unknown=0, NotChecked=0, Total=31506 [2022-02-15 01:56:07,457 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 184 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 26567 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 26678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 26567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:07,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 508 Invalid, 26678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 26567 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-02-15 01:56:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-02-15 01:56:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1776. [2022-02-15 01:56:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1768 states have (on average 1.0740950226244343) internal successors, (1899), 1769 states have internal predecessors, (1899), 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) [2022-02-15 01:56:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 1906 transitions. [2022-02-15 01:56:11,725 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 1906 transitions. Word has length 206 [2022-02-15 01:56:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:11,726 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 1906 transitions. [2022-02-15 01:56:11,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.463768115942029) internal successors, (202), 136 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 1906 transitions. [2022-02-15 01:56:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-15 01:56:11,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:11,728 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 60, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:11,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-15 01:56:11,728 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:11,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1842325978, now seen corresponding path program 30 times [2022-02-15 01:56:11,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:11,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625077900] [2022-02-15 01:56:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:11,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:56:11,746 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:56:11,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:12,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:13,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:13,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625077900] [2022-02-15 01:56:13,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625077900] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:13,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:13,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:56:13,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745013780] [2022-02-15 01:56:13,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:13,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:56:13,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:13,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:56:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:56:13,343 INFO L87 Difference]: Start difference. First operand 1776 states and 1906 transitions. Second operand has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 67 states have internal predecessors, (201), 2 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) [2022-02-15 01:56:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:19,419 INFO L93 Difference]: Finished difference Result 2334 states and 2539 transitions. [2022-02-15 01:56:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 01:56:19,419 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 67 states have internal predecessors, (201), 2 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) Word has length 209 [2022-02-15 01:56:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:19,421 INFO L225 Difference]: With dead ends: 2334 [2022-02-15 01:56:19,421 INFO L226 Difference]: Without dead ends: 2126 [2022-02-15 01:56:19,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 32 SyntacticMatches, 48 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5069 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:56:19,422 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 237 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:19,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 48 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:56:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-02-15 01:56:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1874. [2022-02-15 01:56:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1866 states have (on average 1.0712754555198285) internal successors, (1999), 1867 states have internal predecessors, (1999), 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) [2022-02-15 01:56:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2006 transitions. [2022-02-15 01:56:23,974 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2006 transitions. Word has length 209 [2022-02-15 01:56:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:23,974 INFO L470 AbstractCegarLoop]: Abstraction has 1874 states and 2006 transitions. [2022-02-15 01:56:23,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 67 states have internal predecessors, (201), 2 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) [2022-02-15 01:56:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2006 transitions. [2022-02-15 01:56:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-15 01:56:23,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:23,976 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:23,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-15 01:56:23,976 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1089195812, now seen corresponding path program 72 times [2022-02-15 01:56:23,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:23,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878396807] [2022-02-15 01:56:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:24,011 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:56:24,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:56:24,050 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:56:24,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:56:24,120 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:56:24,120 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:56:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:24,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:30,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:30,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878396807] [2022-02-15 01:56:30,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878396807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:30,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:30,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-15 01:56:30,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728011180] [2022-02-15 01:56:30,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:30,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-15 01:56:30,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-15 01:56:30,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=19129, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:56:30,471 INFO L87 Difference]: Start difference. First operand 1874 states and 2006 transitions. Second operand has 140 states, 140 states have (on average 1.4642857142857142) internal successors, (205), 138 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:49,233 INFO L93 Difference]: Finished difference Result 2359 states and 2567 transitions. [2022-02-15 01:56:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-02-15 01:56:49,233 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.4642857142857142) internal successors, (205), 138 states have internal predecessors, (205), 2 states have call successors, (3), 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 209 [2022-02-15 01:56:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:49,235 INFO L225 Difference]: With dead ends: 2359 [2022-02-15 01:56:49,235 INFO L226 Difference]: Without dead ends: 2153 [2022-02-15 01:56:49,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11345 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1081, Invalid=42391, Unknown=0, NotChecked=0, Total=43472 [2022-02-15 01:56:49,238 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 388 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 30635 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 30910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 30635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:49,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 185 Invalid, 30910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 30635 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-02-15 01:56:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-02-15 01:56:54,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1969. [2022-02-15 01:56:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1961 states have (on average 1.0688424273329933) internal successors, (2096), 1962 states have internal predecessors, (2096), 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) [2022-02-15 01:56:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2103 transitions. [2022-02-15 01:56:54,417 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2103 transitions. Word has length 209 [2022-02-15 01:56:54,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:54,417 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 2103 transitions. [2022-02-15 01:56:54,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.4642857142857142) internal successors, (205), 138 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:54,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2103 transitions. [2022-02-15 01:56:54,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-02-15 01:56:54,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:54,419 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:54,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-15 01:56:54,419 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash -449989113, now seen corresponding path program 73 times [2022-02-15 01:56:54,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:54,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182320166] [2022-02-15 01:56:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:54,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:56:54,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:56:54,504 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:56:54,549 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:56:54,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:56:54,586 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:56:54,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:54,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:01,233 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:01,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182320166] [2022-02-15 01:57:01,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [182320166] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:01,233 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:01,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-02-15 01:57:01,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979325850] [2022-02-15 01:57:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:01,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-02-15 01:57:01,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-02-15 01:57:01,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=19686, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 01:57:01,236 INFO L87 Difference]: Start difference. First operand 1969 states and 2103 transitions. Second operand has 142 states, 142 states have (on average 1.4647887323943662) internal successors, (208), 140 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)