/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:03:18,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:03:18,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:03:18,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:03:18,078 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 02:03:18,088 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:03:18,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:03:18,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:03:18,090 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:03:18,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:03:18,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:03:18,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:03:18,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:03:18,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:03:18,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:03:18,091 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:03:18,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:03:18,091 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:03:18,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:03:18,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:03:18,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:03:18,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:03:18,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:03:18,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:03:18,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:03:18,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:03:18,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:03:18,092 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:03:18,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:03:18,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:03:18,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:03:18,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:03:18,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:03:18,325 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:03:18,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-02-15 02:03:18,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8934d381d/6c4c9b8fcf8844f489c57ff7eed13c86/FLAGb5065259f [2022-02-15 02:03:18,780 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:03:18,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-02-15 02:03:18,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8934d381d/6c4c9b8fcf8844f489c57ff7eed13c86/FLAGb5065259f [2022-02-15 02:03:18,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8934d381d/6c4c9b8fcf8844f489c57ff7eed13c86 [2022-02-15 02:03:18,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:03:18,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:03:18,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:03:18,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:03:18,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:03:18,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:03:18" (1/1) ... [2022-02-15 02:03:18,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f926a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:18, skipping insertion in model container [2022-02-15 02:03:18,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:03:18" (1/1) ... [2022-02-15 02:03:18,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:03:18,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:03:18,961 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c[318,331] [2022-02-15 02:03:18,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:03:18,982 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:03:18,990 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c[318,331] [2022-02-15 02:03:18,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:03:19,005 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:03:19,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19 WrapperNode [2022-02-15 02:03:19,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:03:19,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:03:19,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:03:19,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:03:19,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19" (1/1) ... [2022-02-15 02:03:19,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19" (1/1) ... [2022-02-15 02:03:19,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19" (1/1) ... [2022-02-15 02:03:19,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19" (1/1) ... [2022-02-15 02:03:19,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19" (1/1) ... [2022-02-15 02:03:19,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19" (1/1) ... [2022-02-15 02:03:19,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19" (1/1) ... [2022-02-15 02:03:19,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:03:19,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:03:19,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:03:19,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:03:19,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19" (1/1) ... [2022-02-15 02:03:19,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:03:19,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:03:19,082 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 02:03:19,088 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 02:03:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:03:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:03:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:03:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 02:03:19,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:03:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:03:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:03:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:03:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:03:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 02:03:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:03:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:03:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:03:19,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:03:19,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:03:19,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:03:19,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:03:19,162 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:03:19,163 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:03:19,236 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:03:19,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:03:19,240 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 02:03:19,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:03:19 BoogieIcfgContainer [2022-02-15 02:03:19,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:03:19,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:03:19,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:03:19,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:03:19,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:03:18" (1/3) ... [2022-02-15 02:03:19,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab1a218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:03:19, skipping insertion in model container [2022-02-15 02:03:19,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:03:19" (2/3) ... [2022-02-15 02:03:19,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab1a218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:03:19, skipping insertion in model container [2022-02-15 02:03:19,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:03:19" (3/3) ... [2022-02-15 02:03:19,246 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2022-02-15 02:03:19,249 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:03:19,250 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:03:19,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:03:19,287 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 02:03:19,287 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:03:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:03:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 02:03:19,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:19,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:19,302 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-02-15 02:03:19,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:19,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598833853] [2022-02-15 02:03:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:19,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:19,372 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:19,532 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 02:03:19,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:19,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598833853] [2022-02-15 02:03:19,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [598833853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:19,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:19,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 02:03:19,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109300623] [2022-02-15 02:03:19,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:19,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 02:03:19,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 02:03:19,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 02:03:19,574 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:19,675 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-15 02:03:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 02:03:19,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 02:03:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:19,683 INFO L225 Difference]: With dead ends: 34 [2022-02-15 02:03:19,683 INFO L226 Difference]: Without dead ends: 14 [2022-02-15 02:03:19,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 02:03:19,690 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:19,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-15 02:03:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-15 02:03:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-02-15 02:03:19,733 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-02-15 02:03:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:19,733 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-02-15 02:03:19,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-02-15 02:03:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 02:03:19,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:19,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:19,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:03:19,735 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-02-15 02:03:19,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:19,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340308636] [2022-02-15 02:03:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:19,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:19,743 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:19,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:19,820 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 02:03:19,821 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:19,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340308636] [2022-02-15 02:03:19,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [340308636] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:19,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:19,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:03:19,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39312633] [2022-02-15 02:03:19,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:19,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:03:19,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:19,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:03:19,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:03:19,823 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:19,868 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-02-15 02:03:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:03:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 02:03:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:19,869 INFO L225 Difference]: With dead ends: 24 [2022-02-15 02:03:19,869 INFO L226 Difference]: Without dead ends: 16 [2022-02-15 02:03:19,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:03:19,870 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:19,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:03:19,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-15 02:03:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-15 02:03:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-15 02:03:19,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-02-15 02:03:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:19,875 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-15 02:03:19,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-15 02:03:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 02:03:19,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:19,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:19,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:03:19,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-02-15 02:03:19,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:19,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442725833] [2022-02-15 02:03:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:19,970 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 02:03:19,971 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:03:19,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:20,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:20,062 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:20,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442725833] [2022-02-15 02:03:20,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1442725833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:20,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:20,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:03:20,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517308855] [2022-02-15 02:03:20,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:20,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:03:20,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:03:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:03:20,065 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:20,139 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-02-15 02:03:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:03:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-15 02:03:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:20,141 INFO L225 Difference]: With dead ends: 26 [2022-02-15 02:03:20,141 INFO L226 Difference]: Without dead ends: 20 [2022-02-15 02:03:20,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:03:20,142 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:20,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:03:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-15 02:03:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-15 02:03:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-15 02:03:20,146 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-02-15 02:03:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:20,147 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-15 02:03:20,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-15 02:03:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 02:03:20,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:20,147 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:20,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:03:20,148 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2022-02-15 02:03:20,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:20,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691621445] [2022-02-15 02:03:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:20,270 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:20,327 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 02:03:20,327 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:20,389 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 02:03:20,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:20,491 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:20,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:20,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:20,627 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 02:03:20,803 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:20,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691621445] [2022-02-15 02:03:20,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [691621445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:20,804 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:20,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:03:20,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849499123] [2022-02-15 02:03:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:20,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:03:20,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:03:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:03:20,806 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:20,940 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-02-15 02:03:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:03:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 02:03:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:20,942 INFO L225 Difference]: With dead ends: 39 [2022-02-15 02:03:20,942 INFO L226 Difference]: Without dead ends: 27 [2022-02-15 02:03:20,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:03:20,959 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:20,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 39 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-15 02:03:20,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-15 02:03:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-15 02:03:20,965 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-02-15 02:03:20,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:20,966 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-15 02:03:20,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-15 02:03:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 02:03:20,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:20,966 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:20,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:03:20,967 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:20,967 INFO L85 PathProgramCache]: Analyzing trace with hash -510493847, now seen corresponding path program 2 times [2022-02-15 02:03:20,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:20,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722796906] [2022-02-15 02:03:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:21,039 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:21,073 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 02:03:21,073 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:21,102 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 02:03:21,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:21,160 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:21,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:21,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:21,270 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:21,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722796906] [2022-02-15 02:03:21,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [722796906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:21,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:21,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:03:21,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369436038] [2022-02-15 02:03:21,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:21,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:03:21,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:03:21,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:03:21,272 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:21,392 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-02-15 02:03:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:03:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-15 02:03:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:21,394 INFO L225 Difference]: With dead ends: 47 [2022-02-15 02:03:21,394 INFO L226 Difference]: Without dead ends: 34 [2022-02-15 02:03:21,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:03:21,395 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:21,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:03:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-15 02:03:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-02-15 02:03:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-02-15 02:03:21,410 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2022-02-15 02:03:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:21,410 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-02-15 02:03:21,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-02-15 02:03:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 02:03:21,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:21,411 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:21,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:03:21,411 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash 969620496, now seen corresponding path program 3 times [2022-02-15 02:03:21,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:21,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278517288] [2022-02-15 02:03:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:21,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:21,507 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 02:03:21,508 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:21,527 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 02:03:21,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:21,590 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:21,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:21,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:21,676 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 02:03:21,776 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:21,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278517288] [2022-02-15 02:03:21,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [278517288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:21,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:21,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:03:21,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095742263] [2022-02-15 02:03:21,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:21,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:03:21,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:03:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:03:21,777 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:21,969 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-02-15 02:03:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:03:21,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 02:03:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:21,971 INFO L225 Difference]: With dead ends: 53 [2022-02-15 02:03:21,971 INFO L226 Difference]: Without dead ends: 33 [2022-02-15 02:03:21,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:03:21,972 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:21,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-15 02:03:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-15 02:03:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-02-15 02:03:21,976 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 27 [2022-02-15 02:03:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:21,976 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-02-15 02:03:21,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-02-15 02:03:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 02:03:21,977 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:21,977 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:21,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:03:21,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:21,978 INFO L85 PathProgramCache]: Analyzing trace with hash -777622499, now seen corresponding path program 4 times [2022-02-15 02:03:21,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:21,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50506970] [2022-02-15 02:03:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:22,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:22,060 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 02:03:22,060 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:22,082 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 02:03:22,130 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:22,131 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:22,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:22,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:22,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:22,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50506970] [2022-02-15 02:03:22,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [50506970] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:22,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:22,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 02:03:22,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839874650] [2022-02-15 02:03:22,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:22,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 02:03:22,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 02:03:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:03:22,402 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:22,689 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2022-02-15 02:03:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 02:03:22,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 02:03:22,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:22,691 INFO L225 Difference]: With dead ends: 75 [2022-02-15 02:03:22,691 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 02:03:22,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:03:22,692 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:22,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 19 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:22,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 02:03:22,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-15 02:03:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-02-15 02:03:22,699 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2022-02-15 02:03:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:22,700 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-02-15 02:03:22,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-02-15 02:03:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 02:03:22,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:22,701 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:22,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:03:22,701 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash -522473983, now seen corresponding path program 5 times [2022-02-15 02:03:22,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:22,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695661945] [2022-02-15 02:03:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:22,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:22,772 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 02:03:22,773 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:22,796 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 02:03:22,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:22,842 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:22,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:22,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:22,928 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 02:03:23,067 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:23,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695661945] [2022-02-15 02:03:23,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [695661945] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:23,068 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:23,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:03:23,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755046778] [2022-02-15 02:03:23,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:23,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:03:23,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:03:23,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:03:23,069 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:23,350 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2022-02-15 02:03:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:03:23,351 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 02:03:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:23,351 INFO L225 Difference]: With dead ends: 79 [2022-02-15 02:03:23,351 INFO L226 Difference]: Without dead ends: 53 [2022-02-15 02:03:23,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=391, Invalid=1015, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:03:23,353 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:23,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-15 02:03:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-15 02:03:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-02-15 02:03:23,358 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 35 [2022-02-15 02:03:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:23,358 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-02-15 02:03:23,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-02-15 02:03:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 02:03:23,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:23,359 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:23,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:03:23,359 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:23,360 INFO L85 PathProgramCache]: Analyzing trace with hash 925460615, now seen corresponding path program 6 times [2022-02-15 02:03:23,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:23,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205604974] [2022-02-15 02:03:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:23,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:23,455 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 02:03:23,455 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:23,482 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 02:03:23,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:23,527 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:23,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:23,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:23,591 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 02:03:23,737 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:23,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205604974] [2022-02-15 02:03:23,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [205604974] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:23,737 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:23,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:03:23,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084962366] [2022-02-15 02:03:23,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:23,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:03:23,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:03:23,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:03:23,738 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:24,114 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2022-02-15 02:03:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:03:24,115 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 02:03:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:24,115 INFO L225 Difference]: With dead ends: 89 [2022-02-15 02:03:24,116 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 02:03:24,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:03:24,117 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:24,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 34 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 02:03:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2022-02-15 02:03:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-02-15 02:03:24,122 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2022-02-15 02:03:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:24,123 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-02-15 02:03:24,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-02-15 02:03:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:03:24,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:24,124 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:24,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:03:24,124 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 897664690, now seen corresponding path program 7 times [2022-02-15 02:03:24,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:24,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653323678] [2022-02-15 02:03:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:24,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:24,201 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 02:03:24,202 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:24,225 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 02:03:24,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:24,273 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:24,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:24,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:24,345 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 02:03:24,536 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:24,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653323678] [2022-02-15 02:03:24,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [653323678] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:24,537 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:24,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:03:24,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888549940] [2022-02-15 02:03:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:24,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:03:24,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:24,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:03:24,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:03:24,538 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:24,978 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2022-02-15 02:03:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:03:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-15 02:03:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:24,980 INFO L225 Difference]: With dead ends: 85 [2022-02-15 02:03:24,981 INFO L226 Difference]: Without dead ends: 49 [2022-02-15 02:03:24,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=1419, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:03:24,982 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:24,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:03:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-15 02:03:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-15 02:03:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-02-15 02:03:24,989 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2022-02-15 02:03:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:24,989 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-02-15 02:03:24,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-02-15 02:03:24,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 02:03:24,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:24,990 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:24,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:03:24,990 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:24,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1296637509, now seen corresponding path program 8 times [2022-02-15 02:03:24,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:24,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349586871] [2022-02-15 02:03:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:25,053 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:25,080 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 02:03:25,080 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:25,109 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 02:03:25,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:25,165 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:25,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:25,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:25,257 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 02:03:25,486 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:25,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349586871] [2022-02-15 02:03:25,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349586871] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:25,486 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:25,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:03:25,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30565779] [2022-02-15 02:03:25,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:25,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:03:25,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:03:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:03:25,487 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:26,019 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2022-02-15 02:03:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:03:26,020 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 02:03:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:26,020 INFO L225 Difference]: With dead ends: 95 [2022-02-15 02:03:26,020 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 02:03:26,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=702, Invalid=1848, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:03:26,022 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:26,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 34 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:03:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 02:03:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-15 02:03:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-02-15 02:03:26,027 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 48 [2022-02-15 02:03:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:26,027 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-02-15 02:03:26,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-02-15 02:03:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 02:03:26,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:26,028 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:26,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:03:26,028 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:26,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1149355906, now seen corresponding path program 9 times [2022-02-15 02:03:26,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:26,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701905245] [2022-02-15 02:03:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:26,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:26,091 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 02:03:26,091 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:26,116 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 02:03:26,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:26,170 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:26,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:26,245 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 02:03:26,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:26,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701905245] [2022-02-15 02:03:26,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [701905245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:26,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:26,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:03:26,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779629591] [2022-02-15 02:03:26,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:26,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:03:26,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:26,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:03:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:03:26,478 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:27,054 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2022-02-15 02:03:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:03:27,054 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 02:03:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:27,055 INFO L225 Difference]: With dead ends: 105 [2022-02-15 02:03:27,055 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 02:03:27,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=858, Invalid=2334, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 02:03:27,056 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:27,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 29 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:03:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 02:03:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-15 02:03:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-02-15 02:03:27,061 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2022-02-15 02:03:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:27,062 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-02-15 02:03:27,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-02-15 02:03:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:03:27,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:27,065 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:27,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:03:27,065 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:27,065 INFO L85 PathProgramCache]: Analyzing trace with hash -246172433, now seen corresponding path program 10 times [2022-02-15 02:03:27,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:27,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417839012] [2022-02-15 02:03:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:27,108 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:27,134 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 02:03:27,135 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:27,155 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 02:03:27,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:27,201 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:27,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:27,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:27,312 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 02:03:27,592 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:27,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417839012] [2022-02-15 02:03:27,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [417839012] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:27,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:27,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:03:27,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792157630] [2022-02-15 02:03:27,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:27,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:03:27,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:27,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:03:27,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=711, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:03:27,594 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:28,319 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-02-15 02:03:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:03:28,319 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 02:03:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:28,320 INFO L225 Difference]: With dead ends: 115 [2022-02-15 02:03:28,320 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 02:03:28,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 02:03:28,322 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:28,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 29 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:03:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 02:03:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-15 02:03:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-02-15 02:03:28,328 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2022-02-15 02:03:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:28,328 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-02-15 02:03:28,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-02-15 02:03:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 02:03:28,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:28,329 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:28,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:03:28,329 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1013674058, now seen corresponding path program 11 times [2022-02-15 02:03:28,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:28,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430747559] [2022-02-15 02:03:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:28,390 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:28,424 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 02:03:28,424 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:28,445 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 02:03:28,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:28,513 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:28,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:28,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:28,641 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 02:03:28,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:28,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430747559] [2022-02-15 02:03:28,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430747559] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:28,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:28,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:28,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933350108] [2022-02-15 02:03:28,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:28,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:03:28,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:28,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:03:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:03:28,983 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:29,868 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2022-02-15 02:03:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:03:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-15 02:03:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:29,869 INFO L225 Difference]: With dead ends: 125 [2022-02-15 02:03:29,869 INFO L226 Difference]: Without dead ends: 69 [2022-02-15 02:03:29,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1215, Invalid=3477, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:03:29,871 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:29,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 54 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:03:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-15 02:03:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-02-15 02:03:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-02-15 02:03:29,875 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 63 [2022-02-15 02:03:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:29,875 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-02-15 02:03:29,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-02-15 02:03:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 02:03:29,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:29,876 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:29,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:03:29,876 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1957732899, now seen corresponding path program 12 times [2022-02-15 02:03:29,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:29,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560296902] [2022-02-15 02:03:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:29,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:29,949 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 02:03:29,949 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:29,975 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 02:03:30,041 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:30,041 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:30,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:30,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:30,157 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 02:03:30,509 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:30,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560296902] [2022-02-15 02:03:30,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560296902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:30,510 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:30,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:03:30,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608211548] [2022-02-15 02:03:30,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:30,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:03:30,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:03:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=1008, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:03:30,511 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:31,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:31,574 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-02-15 02:03:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:03:31,574 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 02:03:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:31,575 INFO L225 Difference]: With dead ends: 135 [2022-02-15 02:03:31,575 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 02:03:31,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1416, Invalid=4134, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:03:31,577 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:31,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 69 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:03:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 02:03:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-02-15 02:03:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-02-15 02:03:31,581 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2022-02-15 02:03:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:31,581 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-02-15 02:03:31,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-02-15 02:03:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:03:31,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:31,582 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:31,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:03:31,582 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:31,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash 649604630, now seen corresponding path program 13 times [2022-02-15 02:03:31,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:31,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844447065] [2022-02-15 02:03:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:31,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:31,651 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 02:03:31,651 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:31,679 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 02:03:31,727 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:31,727 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:31,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:31,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:31,847 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 02:03:32,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:32,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844447065] [2022-02-15 02:03:32,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [844447065] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:32,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:32,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:03:32,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181955566] [2022-02-15 02:03:32,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:32,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:03:32,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:32,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:03:32,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1176, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:03:32,265 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:33,423 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2022-02-15 02:03:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 02:03:33,424 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 02:03:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:33,425 INFO L225 Difference]: With dead ends: 145 [2022-02-15 02:03:33,425 INFO L226 Difference]: Without dead ends: 79 [2022-02-15 02:03:33,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1632, Invalid=4848, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 02:03:33,427 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:33,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 34 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:03:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-15 02:03:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-02-15 02:03:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-02-15 02:03:33,438 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 73 [2022-02-15 02:03:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:33,438 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-02-15 02:03:33,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-02-15 02:03:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:03:33,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:33,439 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:33,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:03:33,439 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:33,439 INFO L85 PathProgramCache]: Analyzing trace with hash -415340201, now seen corresponding path program 14 times [2022-02-15 02:03:33,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:33,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104801507] [2022-02-15 02:03:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:33,495 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:33,527 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 02:03:33,527 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:33,546 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 02:03:33,584 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:33,584 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:33,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:33,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:33,748 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 02:03:34,252 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:34,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104801507] [2022-02-15 02:03:34,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [104801507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:34,252 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:34,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 02:03:34,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619110049] [2022-02-15 02:03:34,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:34,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 02:03:34,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 02:03:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:03:34,253 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:35,457 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2022-02-15 02:03:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 02:03:35,457 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:03:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:35,458 INFO L225 Difference]: With dead ends: 155 [2022-02-15 02:03:35,458 INFO L226 Difference]: Without dead ends: 84 [2022-02-15 02:03:35,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1863, Invalid=5619, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 02:03:35,460 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:35,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 29 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:03:35,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-15 02:03:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-02-15 02:03:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-02-15 02:03:35,465 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 78 [2022-02-15 02:03:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:35,465 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-02-15 02:03:35,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-02-15 02:03:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 02:03:35,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:35,466 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:35,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:03:35,466 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash -300699166, now seen corresponding path program 15 times [2022-02-15 02:03:35,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:35,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493889270] [2022-02-15 02:03:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:35,528 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:35,553 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 02:03:35,553 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:35,571 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 02:03:35,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:35,629 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:35,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:35,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:35,780 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 02:03:36,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:36,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493889270] [2022-02-15 02:03:36,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493889270] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:36,320 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:36,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 02:03:36,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004866406] [2022-02-15 02:03:36,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:36,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 02:03:36,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 02:03:36,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:03:36,322 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:37,727 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2022-02-15 02:03:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 02:03:37,727 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 02:03:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:37,728 INFO L225 Difference]: With dead ends: 165 [2022-02-15 02:03:37,728 INFO L226 Difference]: Without dead ends: 89 [2022-02-15 02:03:37,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2368 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2109, Invalid=6447, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 02:03:37,730 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:37,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 34 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:03:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-15 02:03:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-02-15 02:03:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-02-15 02:03:37,735 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 83 [2022-02-15 02:03:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:37,735 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-02-15 02:03:37,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-02-15 02:03:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-15 02:03:37,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:37,736 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:37,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:03:37,736 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1076742795, now seen corresponding path program 16 times [2022-02-15 02:03:37,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:37,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102721606] [2022-02-15 02:03:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:37,788 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:37,807 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 02:03:37,807 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:37,826 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 02:03:37,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:37,879 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:37,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:38,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:38,629 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:38,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102721606] [2022-02-15 02:03:38,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [102721606] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:38,629 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:38,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-15 02:03:38,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658255954] [2022-02-15 02:03:38,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:38,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-15 02:03:38,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:38,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-15 02:03:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=1758, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:03:38,630 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 51 states, 51 states have (on average 1.6470588235294117) internal successors, (84), 50 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:40,265 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2022-02-15 02:03:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 02:03:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6470588235294117) internal successors, (84), 50 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-02-15 02:03:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:40,266 INFO L225 Difference]: With dead ends: 175 [2022-02-15 02:03:40,266 INFO L226 Difference]: Without dead ends: 94 [2022-02-15 02:03:40,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2370, Invalid=7332, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 02:03:40,267 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 202 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:40,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 49 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:03:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-15 02:03:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-02-15 02:03:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-02-15 02:03:40,275 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 88 [2022-02-15 02:03:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:40,275 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-02-15 02:03:40,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6470588235294117) internal successors, (84), 50 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-02-15 02:03:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 02:03:40,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:40,279 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:40,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:03:40,279 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -412271698, now seen corresponding path program 17 times [2022-02-15 02:03:40,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:40,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677233400] [2022-02-15 02:03:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:40,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:40,336 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 02:03:40,336 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:40,354 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 02:03:40,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:40,418 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:40,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:40,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:40,616 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 02:03:41,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:41,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677233400] [2022-02-15 02:03:41,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1677233400] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:41,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:41,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 02:03:41,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827832238] [2022-02-15 02:03:41,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:41,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 02:03:41,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 02:03:41,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=1978, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 02:03:41,266 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 54 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:43,105 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2022-02-15 02:03:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 02:03:43,105 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 02:03:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:43,106 INFO L225 Difference]: With dead ends: 185 [2022-02-15 02:03:43,106 INFO L226 Difference]: Without dead ends: 99 [2022-02-15 02:03:43,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2646, Invalid=8274, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 02:03:43,108 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:43,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 29 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:03:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-15 02:03:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-02-15 02:03:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-02-15 02:03:43,115 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 93 [2022-02-15 02:03:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:43,115 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-02-15 02:03:43,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-02-15 02:03:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-15 02:03:43,116 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:43,116 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:43,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 02:03:43,117 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:43,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:43,117 INFO L85 PathProgramCache]: Analyzing trace with hash -412121665, now seen corresponding path program 18 times [2022-02-15 02:03:43,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:43,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894691950] [2022-02-15 02:03:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:43,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:43,198 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 02:03:43,199 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:43,218 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 02:03:43,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:43,257 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:43,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:43,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:43,453 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 02:03:44,158 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:44,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894691950] [2022-02-15 02:03:44,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894691950] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:44,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:44,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-15 02:03:44,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898477784] [2022-02-15 02:03:44,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:44,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-15 02:03:44,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-15 02:03:44,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=981, Invalid=2211, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 02:03:44,161 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 56 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:46,138 INFO L93 Difference]: Finished difference Result 195 states and 206 transitions. [2022-02-15 02:03:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 02:03:46,138 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 56 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-02-15 02:03:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:46,139 INFO L225 Difference]: With dead ends: 195 [2022-02-15 02:03:46,139 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 02:03:46,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3409 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2937, Invalid=9273, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 02:03:46,141 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 300 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:46,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 34 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:03:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 02:03:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-02-15 02:03:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-02-15 02:03:46,148 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 98 [2022-02-15 02:03:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:46,148 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-02-15 02:03:46,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 56 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-02-15 02:03:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-15 02:03:46,149 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:46,149 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:46,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:03:46,149 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:46,149 INFO L85 PathProgramCache]: Analyzing trace with hash 619973498, now seen corresponding path program 19 times [2022-02-15 02:03:46,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:46,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067760783] [2022-02-15 02:03:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:46,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:46,236 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 02:03:46,236 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:46,257 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 02:03:46,325 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:46,325 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:46,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:46,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:46,554 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 02:03:47,349 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:47,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067760783] [2022-02-15 02:03:47,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067760783] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:47,349 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:47,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-15 02:03:47,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601320438] [2022-02-15 02:03:47,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:47,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 02:03:47,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:47,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 02:03:47,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=2457, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 02:03:47,351 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 60 states, 60 states have (on average 1.65) internal successors, (99), 59 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:49,710 INFO L93 Difference]: Finished difference Result 205 states and 216 transitions. [2022-02-15 02:03:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 02:03:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 59 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-02-15 02:03:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:49,713 INFO L225 Difference]: With dead ends: 205 [2022-02-15 02:03:49,713 INFO L226 Difference]: Without dead ends: 109 [2022-02-15 02:03:49,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3243, Invalid=10329, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 02:03:49,715 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 314 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2775 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:49,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 54 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2775 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:03:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-15 02:03:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-02-15 02:03:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-02-15 02:03:49,722 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 103 [2022-02-15 02:03:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:49,722 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-02-15 02:03:49,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 59 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-02-15 02:03:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-15 02:03:49,722 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:49,723 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:49,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:03:49,723 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash -642491661, now seen corresponding path program 20 times [2022-02-15 02:03:49,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:49,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913750465] [2022-02-15 02:03:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:49,766 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:49,794 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 02:03:49,794 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:49,819 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 02:03:49,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:49,869 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:50,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:50,112 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 02:03:50,921 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:50,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913750465] [2022-02-15 02:03:50,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1913750465] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:50,922 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:50,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-15 02:03:50,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738051217] [2022-02-15 02:03:50,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:50,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-15 02:03:50,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:50,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-15 02:03:50,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=2716, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 02:03:50,923 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 62 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:53,340 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2022-02-15 02:03:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 02:03:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 62 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-02-15 02:03:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:53,341 INFO L225 Difference]: With dead ends: 215 [2022-02-15 02:03:53,341 INFO L226 Difference]: Without dead ends: 114 [2022-02-15 02:03:53,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4208 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3564, Invalid=11442, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 02:03:53,343 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:53,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 44 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3041 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:03:53,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-15 02:03:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-02-15 02:03:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.036697247706422) internal successors, (113), 109 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-02-15 02:03:53,348 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 108 [2022-02-15 02:03:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:53,348 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-02-15 02:03:53,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 62 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-02-15 02:03:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-15 02:03:53,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:53,349 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:53,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:03:53,349 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1377263942, now seen corresponding path program 21 times [2022-02-15 02:03:53,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:53,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726164221] [2022-02-15 02:03:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:53,405 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:53,429 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 02:03:53,429 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:53,446 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 02:03:53,496 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:53,496 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:53,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:53,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:54,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:54,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726164221] [2022-02-15 02:03:54,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1726164221] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:54,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:54,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-15 02:03:54,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14387822] [2022-02-15 02:03:54,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:54,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-15 02:03:54,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-15 02:03:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1400, Invalid=3292, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:03:54,669 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 65 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:57,382 INFO L93 Difference]: Finished difference Result 301 states and 312 transitions. [2022-02-15 02:03:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 02:03:57,382 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 65 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-02-15 02:03:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:57,383 INFO L225 Difference]: With dead ends: 301 [2022-02-15 02:03:57,383 INFO L226 Difference]: Without dead ends: 195 [2022-02-15 02:03:57,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5033 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4003, Invalid=13289, Unknown=0, NotChecked=0, Total=17292 [2022-02-15 02:03:57,385 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 221 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:57,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 39 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:03:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-15 02:03:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-02-15 02:03:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0263157894736843) internal successors, (195), 190 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2022-02-15 02:03:57,397 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 113 [2022-02-15 02:03:57,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:57,397 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2022-02-15 02:03:57,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 65 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2022-02-15 02:03:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 02:03:57,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:57,398 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:57,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:03:57,399 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2017151266, now seen corresponding path program 22 times [2022-02-15 02:03:57,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:57,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051369806] [2022-02-15 02:03:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:57,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:57,478 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 02:03:57,478 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:57,498 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 02:03:57,542 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:57,543 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:57,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:57,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:57,787 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 02:03:58,709 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:58,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051369806] [2022-02-15 02:03:58,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051369806] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:58,709 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:58,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 02:03:58,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512984090] [2022-02-15 02:03:58,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:58,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 02:03:58,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 02:03:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=3163, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 02:03:58,711 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:01,553 INFO L93 Difference]: Finished difference Result 309 states and 323 transitions. [2022-02-15 02:04:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 02:04:01,553 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-02-15 02:04:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:01,554 INFO L225 Difference]: With dead ends: 309 [2022-02-15 02:04:01,554 INFO L226 Difference]: Without dead ends: 202 [2022-02-15 02:04:01,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4959 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4173, Invalid=13383, Unknown=0, NotChecked=0, Total=17556 [2022-02-15 02:04:01,556 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 270 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3558 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 3558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:01,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 54 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 3558 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:04:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-02-15 02:04:01,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 122. [2022-02-15 02:04:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 117 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-02-15 02:04:01,563 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 116 [2022-02-15 02:04:01,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:01,564 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-02-15 02:04:01,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-02-15 02:04:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-15 02:04:01,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:01,564 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:01,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:04:01,565 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1925225737, now seen corresponding path program 23 times [2022-02-15 02:04:01,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:01,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12975185] [2022-02-15 02:04:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:01,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:01,641 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 02:04:01,641 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:01,681 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 02:04:01,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:01,740 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:01,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:02,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:02,027 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 02:04:03,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:03,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12975185] [2022-02-15 02:04:03,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [12975185] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:03,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:03,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 02:04:03,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580107477] [2022-02-15 02:04:03,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:03,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 02:04:03,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:03,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 02:04:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=3456, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:04:03,102 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:06,061 INFO L93 Difference]: Finished difference Result 241 states and 252 transitions. [2022-02-15 02:04:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 02:04:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-02-15 02:04:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:06,062 INFO L225 Difference]: With dead ends: 241 [2022-02-15 02:04:06,062 INFO L226 Difference]: Without dead ends: 127 [2022-02-15 02:04:06,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5426 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4536, Invalid=14646, Unknown=0, NotChecked=0, Total=19182 [2022-02-15 02:04:06,064 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 283 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3863 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 3863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:06,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 39 Invalid, 4219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 3863 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:04:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-15 02:04:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-02-15 02:04:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-02-15 02:04:06,070 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 121 [2022-02-15 02:04:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:06,070 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-02-15 02:04:06,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-02-15 02:04:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-15 02:04:06,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:06,071 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:06,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:04:06,071 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:06,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:06,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1939756182, now seen corresponding path program 24 times [2022-02-15 02:04:06,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:06,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709385733] [2022-02-15 02:04:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:06,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:06,133 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 02:04:06,133 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:06,151 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 02:04:06,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:06,202 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:06,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:06,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:06,526 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 02:04:07,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:07,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709385733] [2022-02-15 02:04:07,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1709385733] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:07,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:07,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 02:04:07,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411340257] [2022-02-15 02:04:07,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:07,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 02:04:07,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:07,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 02:04:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1749, Invalid=4103, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 02:04:07,609 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:10,968 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2022-02-15 02:04:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 02:04:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-02-15 02:04:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:10,994 INFO L225 Difference]: With dead ends: 337 [2022-02-15 02:04:10,994 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 02:04:10,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6357 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5028, Invalid=16728, Unknown=0, NotChecked=0, Total=21756 [2022-02-15 02:04:10,996 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 4366 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 4539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 4366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:10,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 54 Invalid, 4539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 4366 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:04:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 02:04:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-02-15 02:04:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0234741784037558) internal successors, (218), 213 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 222 transitions. [2022-02-15 02:04:11,008 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 222 transitions. Word has length 126 [2022-02-15 02:04:11,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:11,008 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 222 transitions. [2022-02-15 02:04:11,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 222 transitions. [2022-02-15 02:04:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-15 02:04:11,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:11,009 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:11,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 02:04:11,009 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:11,010 INFO L85 PathProgramCache]: Analyzing trace with hash -375497880, now seen corresponding path program 25 times [2022-02-15 02:04:11,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:11,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371385121] [2022-02-15 02:04:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:11,062 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:11,088 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 02:04:11,089 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:11,108 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 02:04:11,158 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:11,159 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:11,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:11,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:11,450 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 02:04:12,592 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:12,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371385121] [2022-02-15 02:04:12,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [371385121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:12,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:12,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 02:04:12,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933074764] [2022-02-15 02:04:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:12,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 02:04:12,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 02:04:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1742, Invalid=3958, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 02:04:12,594 INFO L87 Difference]: Start difference. First operand 218 states and 222 transitions. Second operand has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:15,950 INFO L93 Difference]: Finished difference Result 345 states and 359 transitions. [2022-02-15 02:04:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 02:04:15,951 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-02-15 02:04:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:15,952 INFO L225 Difference]: With dead ends: 345 [2022-02-15 02:04:15,952 INFO L226 Difference]: Without dead ends: 225 [2022-02-15 02:04:15,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6274 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5220, Invalid=16832, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 02:04:15,955 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 203 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4392 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 4674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 4392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:15,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 29 Invalid, 4674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 4392 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:04:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-15 02:04:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 135. [2022-02-15 02:04:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-02-15 02:04:15,963 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 129 [2022-02-15 02:04:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:15,964 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-02-15 02:04:15,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-02-15 02:04:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-15 02:04:15,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:15,965 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:15,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 02:04:15,965 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1727954875, now seen corresponding path program 26 times [2022-02-15 02:04:15,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:15,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851916104] [2022-02-15 02:04:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:16,020 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:16,040 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 02:04:16,040 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:16,065 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 02:04:16,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:16,105 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:16,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:16,410 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 02:04:17,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:17,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851916104] [2022-02-15 02:04:17,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1851916104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:17,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:17,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-15 02:04:17,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198011651] [2022-02-15 02:04:17,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:17,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-15 02:04:17,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-15 02:04:17,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1877, Invalid=4285, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 02:04:17,630 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:21,277 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2022-02-15 02:04:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 02:04:21,277 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-15 02:04:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:21,278 INFO L225 Difference]: With dead ends: 267 [2022-02-15 02:04:21,278 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 02:04:21,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6798 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5625, Invalid=18245, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 02:04:21,280 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 261 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4761 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:21,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 39 Invalid, 4901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4761 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:04:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 02:04:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-02-15 02:04:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-02-15 02:04:21,285 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 134 [2022-02-15 02:04:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:21,285 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-02-15 02:04:21,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-02-15 02:04:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-15 02:04:21,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:21,286 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:21,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 02:04:21,286 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:21,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1660936524, now seen corresponding path program 27 times [2022-02-15 02:04:21,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:21,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370644753] [2022-02-15 02:04:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:21,342 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:21,369 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 02:04:21,369 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:21,388 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 02:04:21,446 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:21,446 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:21,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:21,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:21,828 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 02:04:23,085 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:23,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370644753] [2022-02-15 02:04:23,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370644753] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:23,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:23,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-15 02:04:23,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925945787] [2022-02-15 02:04:23,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:23,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-15 02:04:23,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-15 02:04:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2017, Invalid=4625, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 02:04:23,087 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:27,001 INFO L93 Difference]: Finished difference Result 277 states and 288 transitions. [2022-02-15 02:04:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 02:04:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-02-15 02:04:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:27,005 INFO L225 Difference]: With dead ends: 277 [2022-02-15 02:04:27,005 INFO L226 Difference]: Without dead ends: 145 [2022-02-15 02:04:27,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7370 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6045, Invalid=19715, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 02:04:27,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5189 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 5189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:27,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 34 Invalid, 5439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 5189 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:04:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-15 02:04:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-02-15 02:04:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-02-15 02:04:27,014 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 139 [2022-02-15 02:04:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:27,014 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-02-15 02:04:27,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-02-15 02:04:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-15 02:04:27,015 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:27,015 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:27,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 02:04:27,015 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash -629534215, now seen corresponding path program 28 times [2022-02-15 02:04:27,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:27,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360520924] [2022-02-15 02:04:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:27,070 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:27,097 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 02:04:27,097 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:27,117 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 02:04:27,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:27,179 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:27,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:27,545 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 02:04:28,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:28,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360520924] [2022-02-15 02:04:28,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [360520924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:28,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:28,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-15 02:04:28,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396342328] [2022-02-15 02:04:28,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-15 02:04:28,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-15 02:04:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2162, Invalid=4978, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 02:04:28,911 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:33,191 INFO L93 Difference]: Finished difference Result 287 states and 298 transitions. [2022-02-15 02:04:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 02:04:33,192 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-02-15 02:04:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:33,193 INFO L225 Difference]: With dead ends: 287 [2022-02-15 02:04:33,193 INFO L226 Difference]: Without dead ends: 150 [2022-02-15 02:04:33,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7909 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6480, Invalid=21242, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 02:04:33,196 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5631 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 5631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:33,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 44 Invalid, 5888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 5631 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 02:04:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-15 02:04:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-02-15 02:04:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-02-15 02:04:33,212 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 144 [2022-02-15 02:04:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:33,212 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-02-15 02:04:33,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-02-15 02:04:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-15 02:04:33,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:33,213 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:33,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 02:04:33,213 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash 467601408, now seen corresponding path program 29 times [2022-02-15 02:04:33,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:33,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087244762] [2022-02-15 02:04:33,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:33,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:33,307 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 02:04:33,307 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:33,326 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 02:04:33,365 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:33,366 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:33,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:33,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:33,717 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 02:04:35,231 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:35,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087244762] [2022-02-15 02:04:35,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087244762] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:35,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:35,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-15 02:04:35,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267469302] [2022-02-15 02:04:35,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:35,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-15 02:04:35,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-15 02:04:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2312, Invalid=5344, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 02:04:35,234 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:39,904 INFO L93 Difference]: Finished difference Result 297 states and 308 transitions. [2022-02-15 02:04:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 02:04:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-02-15 02:04:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:39,905 INFO L225 Difference]: With dead ends: 297 [2022-02-15 02:04:39,905 INFO L226 Difference]: Without dead ends: 155 [2022-02-15 02:04:39,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8496 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6930, Invalid=22826, Unknown=0, NotChecked=0, Total=29756 [2022-02-15 02:04:39,907 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 349 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 6073 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 6457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 6073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:39,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 54 Invalid, 6457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 6073 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 02:04:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-15 02:04:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-02-15 02:04:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-02-15 02:04:39,915 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 149 [2022-02-15 02:04:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:39,915 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-02-15 02:04:39,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-02-15 02:04:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-02-15 02:04:39,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:39,916 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:39,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 02:04:39,916 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:39,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1924538963, now seen corresponding path program 30 times [2022-02-15 02:04:39,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:39,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11614697] [2022-02-15 02:04:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:39,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:39,984 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 02:04:39,984 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:40,014 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 02:04:40,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:40,059 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:40,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:40,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:40,448 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 02:04:42,047 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:42,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11614697] [2022-02-15 02:04:42,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [11614697] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:42,048 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:42,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-15 02:04:42,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511871721] [2022-02-15 02:04:42,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:42,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-15 02:04:42,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-15 02:04:42,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2467, Invalid=5723, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 02:04:42,049 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 91 states, 91 states have (on average 1.6483516483516483) internal successors, (150), 90 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:46,951 INFO L93 Difference]: Finished difference Result 307 states and 318 transitions. [2022-02-15 02:04:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-15 02:04:46,952 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.6483516483516483) internal successors, (150), 90 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-02-15 02:04:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:46,953 INFO L225 Difference]: With dead ends: 307 [2022-02-15 02:04:46,953 INFO L226 Difference]: Without dead ends: 160 [2022-02-15 02:04:46,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7395, Invalid=24467, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 02:04:46,954 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 243 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6509 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 6843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 6509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:46,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 34 Invalid, 6843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 6509 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 02:04:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-15 02:04:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-02-15 02:04:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-02-15 02:04:46,961 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 154 [2022-02-15 02:04:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:46,961 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-02-15 02:04:46,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.6483516483516483) internal successors, (150), 90 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-02-15 02:04:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-02-15 02:04:46,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:46,962 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:46,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 02:04:46,962 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1944213324, now seen corresponding path program 31 times [2022-02-15 02:04:46,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:46,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713897877] [2022-02-15 02:04:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:47,004 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:47,032 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 02:04:47,032 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:47,052 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 02:04:47,093 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:47,094 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:47,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:47,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:47,518 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 02:04:49,183 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:49,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713897877] [2022-02-15 02:04:49,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713897877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:49,184 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:49,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-15 02:04:49,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108557555] [2022-02-15 02:04:49,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:49,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-15 02:04:49,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:49,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-15 02:04:49,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2627, Invalid=6115, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 02:04:49,185 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 94 states, 94 states have (on average 1.648936170212766) internal successors, (155), 93 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:54,629 INFO L93 Difference]: Finished difference Result 317 states and 328 transitions. [2022-02-15 02:04:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-15 02:04:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.648936170212766) internal successors, (155), 93 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-02-15 02:04:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:54,630 INFO L225 Difference]: With dead ends: 317 [2022-02-15 02:04:54,630 INFO L226 Difference]: Without dead ends: 165 [2022-02-15 02:04:54,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9733 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7875, Invalid=26165, Unknown=0, NotChecked=0, Total=34040 [2022-02-15 02:04:54,633 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 372 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7018 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 7426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 7018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:54,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 39 Invalid, 7426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 7018 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 02:04:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-15 02:04:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-02-15 02:04:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-02-15 02:04:54,639 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 159 [2022-02-15 02:04:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:54,639 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-02-15 02:04:54,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.648936170212766) internal successors, (155), 93 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-02-15 02:04:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-02-15 02:04:54,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:54,640 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:54,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 02:04:54,640 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:54,641 INFO L85 PathProgramCache]: Analyzing trace with hash -643194015, now seen corresponding path program 32 times [2022-02-15 02:04:54,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:54,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708210117] [2022-02-15 02:04:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:54,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:54,705 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 02:04:54,706 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:54,739 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 02:04:54,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:54,812 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:54,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:55,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:56,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:56,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708210117] [2022-02-15 02:04:56,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708210117] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:56,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:56,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-15 02:04:56,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168349263] [2022-02-15 02:04:56,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:56,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-15 02:04:56,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-15 02:04:56,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2792, Invalid=6520, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 02:04:56,963 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 97 states, 97 states have (on average 1.6494845360824741) internal successors, (160), 96 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:02,384 INFO L93 Difference]: Finished difference Result 327 states and 338 transitions. [2022-02-15 02:05:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-15 02:05:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.6494845360824741) internal successors, (160), 96 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-02-15 02:05:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:02,385 INFO L225 Difference]: With dead ends: 327 [2022-02-15 02:05:02,385 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 02:05:02,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10383 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8370, Invalid=27920, Unknown=0, NotChecked=0, Total=36290 [2022-02-15 02:05:02,387 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 322 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7427 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 7427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:02,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 24 Invalid, 7845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 7427 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 02:05:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 02:05:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-15 02:05:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 165 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-02-15 02:05:02,394 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 164 [2022-02-15 02:05:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:02,394 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-02-15 02:05:02,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.6494845360824741) internal successors, (160), 96 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-02-15 02:05:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-02-15 02:05:02,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:02,395 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:02,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 02:05:02,395 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash -571388776, now seen corresponding path program 33 times [2022-02-15 02:05:02,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:02,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927845094] [2022-02-15 02:05:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:02,450 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:02,469 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 02:05:02,469 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:02,487 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 02:05:02,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:02,535 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:02,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:03,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:03,003 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 02:05:04,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:04,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927845094] [2022-02-15 02:05:04,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927845094] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:04,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:04,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-15 02:05:04,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914075911] [2022-02-15 02:05:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:04,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-15 02:05:04,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-15 02:05:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2962, Invalid=6938, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 02:05:04,804 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 100 states, 100 states have (on average 1.65) internal successors, (165), 99 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:10,581 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2022-02-15 02:05:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-15 02:05:10,582 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.65) internal successors, (165), 99 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-02-15 02:05:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:10,583 INFO L225 Difference]: With dead ends: 337 [2022-02-15 02:05:10,583 INFO L226 Difference]: Without dead ends: 175 [2022-02-15 02:05:10,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11054 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8880, Invalid=29732, Unknown=0, NotChecked=0, Total=38612 [2022-02-15 02:05:10,585 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 331 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7931 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 8301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 7931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:10,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 24 Invalid, 8301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 7931 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:05:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-15 02:05:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-02-15 02:05:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-02-15 02:05:10,593 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 169 [2022-02-15 02:05:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:10,593 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-02-15 02:05:10,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.65) internal successors, (165), 99 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-02-15 02:05:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-02-15 02:05:10,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:10,594 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:10,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 02:05:10,594 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1318200085, now seen corresponding path program 34 times [2022-02-15 02:05:10,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:10,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322430371] [2022-02-15 02:05:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:10,632 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:10,653 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 02:05:10,653 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:10,674 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 02:05:10,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:10,728 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:10,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:11,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:13,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:13,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322430371] [2022-02-15 02:05:13,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [322430371] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:13,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:13,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-02-15 02:05:13,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611832495] [2022-02-15 02:05:13,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:13,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-15 02:05:13,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-15 02:05:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=7369, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 02:05:13,102 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 103 states, 103 states have (on average 1.6504854368932038) internal successors, (170), 102 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:19,332 INFO L93 Difference]: Finished difference Result 347 states and 358 transitions. [2022-02-15 02:05:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-15 02:05:19,333 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.6504854368932038) internal successors, (170), 102 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-02-15 02:05:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:19,334 INFO L225 Difference]: With dead ends: 347 [2022-02-15 02:05:19,334 INFO L226 Difference]: Without dead ends: 180 [2022-02-15 02:05:19,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11746 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9405, Invalid=31601, Unknown=0, NotChecked=0, Total=41006 [2022-02-15 02:05:19,337 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 339 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 8427 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 8873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 8427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:19,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 49 Invalid, 8873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 8427 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 02:05:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-15 02:05:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-02-15 02:05:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2022-02-15 02:05:19,346 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 174 [2022-02-15 02:05:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:19,346 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2022-02-15 02:05:19,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.6504854368932038) internal successors, (170), 102 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2022-02-15 02:05:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-02-15 02:05:19,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:19,347 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:19,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 02:05:19,347 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash 439560164, now seen corresponding path program 35 times [2022-02-15 02:05:19,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:19,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362229940] [2022-02-15 02:05:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:19,417 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:19,438 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 02:05:19,438 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:19,461 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 02:05:19,507 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:19,508 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:19,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:20,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:20,062 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 02:05:22,116 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:22,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362229940] [2022-02-15 02:05:22,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [362229940] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:22,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:22,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-15 02:05:22,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136975910] [2022-02-15 02:05:22,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:22,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-15 02:05:22,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-15 02:05:22,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3469, Invalid=8303, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 02:05:22,119 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand has 106 states, 106 states have (on average 1.650943396226415) internal successors, (175), 105 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:28,823 INFO L93 Difference]: Finished difference Result 485 states and 496 transitions. [2022-02-15 02:05:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-15 02:05:28,824 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.650943396226415) internal successors, (175), 105 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-02-15 02:05:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:28,825 INFO L225 Difference]: With dead ends: 485 [2022-02-15 02:05:28,825 INFO L226 Difference]: Without dead ends: 313 [2022-02-15 02:05:28,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13103 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10102, Invalid=34630, Unknown=0, NotChecked=0, Total=44732 [2022-02-15 02:05:28,829 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 690 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9284 mSolverCounterSat, 730 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 9284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:28,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 29 Invalid, 10014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 9284 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-15 02:05:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-15 02:05:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-02-15 02:05:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0162337662337662) internal successors, (313), 308 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 317 transitions. [2022-02-15 02:05:28,852 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 317 transitions. Word has length 179 [2022-02-15 02:05:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:28,852 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 317 transitions. [2022-02-15 02:05:28,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.650943396226415) internal successors, (175), 105 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 317 transitions. [2022-02-15 02:05:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-15 02:05:28,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:28,853 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:28,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 02:05:28,854 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1488400644, now seen corresponding path program 36 times [2022-02-15 02:05:28,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:28,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093274064] [2022-02-15 02:05:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:28,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:28,921 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 02:05:28,922 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:28,947 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 02:05:28,984 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:28,984 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:28,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:29,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:29,497 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 02:05:31,628 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:31,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093274064] [2022-02-15 02:05:31,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2093274064] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:31,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:31,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-15 02:05:31,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909950474] [2022-02-15 02:05:31,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:31,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-15 02:05:31,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:31,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-15 02:05:31,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3462, Invalid=8094, Unknown=0, NotChecked=0, Total=11556 [2022-02-15 02:05:31,630 INFO L87 Difference]: Start difference. First operand 313 states and 317 transitions. Second operand has 108 states, 108 states have (on average 1.6481481481481481) internal successors, (178), 107 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:38,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:38,470 INFO L93 Difference]: Finished difference Result 493 states and 507 transitions. [2022-02-15 02:05:38,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-15 02:05:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.6481481481481481) internal successors, (178), 107 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-02-15 02:05:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:38,471 INFO L225 Difference]: With dead ends: 493 [2022-02-15 02:05:38,471 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 02:05:38,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12979 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10380, Invalid=34776, Unknown=0, NotChecked=0, Total=45156 [2022-02-15 02:05:38,474 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 425 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9244 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 9710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 9244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:38,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 34 Invalid, 9710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 9244 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-15 02:05:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 02:05:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 188. [2022-02-15 02:05:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 183 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 191 transitions. [2022-02-15 02:05:38,481 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 191 transitions. Word has length 182 [2022-02-15 02:05:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:38,482 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 191 transitions. [2022-02-15 02:05:38,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.6481481481481481) internal successors, (178), 107 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 191 transitions. [2022-02-15 02:05:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-15 02:05:38,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:38,482 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:38,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 02:05:38,483 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash 596541909, now seen corresponding path program 37 times [2022-02-15 02:05:38,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:38,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299861992] [2022-02-15 02:05:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:38,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:38,559 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 02:05:38,560 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:38,584 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 02:05:38,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:38,637 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:38,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:39,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:39,208 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 02:05:41,452 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:41,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299861992] [2022-02-15 02:05:41,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [299861992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:41,453 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:41,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-15 02:05:41,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476861540] [2022-02-15 02:05:41,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:41,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-15 02:05:41,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:41,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-15 02:05:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3651, Invalid=8559, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 02:05:41,454 INFO L87 Difference]: Start difference. First operand 188 states and 191 transitions. Second operand has 111 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 110 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:48,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:48,657 INFO L93 Difference]: Finished difference Result 373 states and 384 transitions. [2022-02-15 02:05:48,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-15 02:05:48,658 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 110 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-02-15 02:05:48,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:48,659 INFO L225 Difference]: With dead ends: 373 [2022-02-15 02:05:48,659 INFO L226 Difference]: Without dead ends: 193 [2022-02-15 02:05:48,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13728 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10947, Invalid=36795, Unknown=0, NotChecked=0, Total=47742 [2022-02-15 02:05:48,661 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 508 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9833 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 10311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 9833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:48,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 44 Invalid, 10311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 9833 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 02:05:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-15 02:05:48,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-02-15 02:05:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2022-02-15 02:05:48,668 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 187 [2022-02-15 02:05:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:48,668 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2022-02-15 02:05:48,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 110 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2022-02-15 02:05:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-02-15 02:05:48,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:48,669 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:48,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 02:05:48,669 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:48,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1954048264, now seen corresponding path program 38 times [2022-02-15 02:05:48,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:48,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449716308] [2022-02-15 02:05:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:48,730 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:48,752 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 02:05:48,753 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:48,777 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 02:05:48,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:48,813 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:48,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:49,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:51,737 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:51,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449716308] [2022-02-15 02:05:51,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449716308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:51,737 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:51,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-15 02:05:51,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914907734] [2022-02-15 02:05:51,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:51,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-15 02:05:51,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-15 02:05:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=9037, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 02:05:51,739 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 114 states, 114 states have (on average 1.6491228070175439) internal successors, (188), 113 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:59,082 INFO L93 Difference]: Finished difference Result 383 states and 394 transitions. [2022-02-15 02:05:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-15 02:05:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.6491228070175439) internal successors, (188), 113 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-02-15 02:05:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:59,083 INFO L225 Difference]: With dead ends: 383 [2022-02-15 02:05:59,083 INFO L226 Difference]: Without dead ends: 198 [2022-02-15 02:05:59,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14498 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=11529, Invalid=38871, Unknown=0, NotChecked=0, Total=50400 [2022-02-15 02:05:59,086 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10357 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 10357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:59,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 39 Invalid, 10703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 10357 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-15 02:05:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-15 02:05:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-02-15 02:05:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 193 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 201 transitions. [2022-02-15 02:05:59,094 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 201 transitions. Word has length 192 [2022-02-15 02:05:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:59,094 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 201 transitions. [2022-02-15 02:05:59,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.6491228070175439) internal successors, (188), 113 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 201 transitions. [2022-02-15 02:05:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-02-15 02:05:59,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:59,095 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:59,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 02:05:59,096 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1346035999, now seen corresponding path program 39 times [2022-02-15 02:05:59,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:59,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35711112] [2022-02-15 02:05:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:59,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:59,154 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 02:05:59,154 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:59,179 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 02:05:59,238 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:59,238 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:59,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:59,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:59,888 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 02:06:02,402 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:02,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35711112] [2022-02-15 02:06:02,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [35711112] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:02,402 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:02,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-15 02:06:02,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759066069] [2022-02-15 02:06:02,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:02,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-15 02:06:02,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-15 02:06:02,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4211, Invalid=10069, Unknown=0, NotChecked=0, Total=14280 [2022-02-15 02:06:02,405 INFO L87 Difference]: Start difference. First operand 198 states and 201 transitions. Second operand has 117 states, 117 states have (on average 1.6495726495726495) internal successors, (193), 116 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:10,567 INFO L93 Difference]: Finished difference Result 535 states and 546 transitions. [2022-02-15 02:06:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-15 02:06:10,568 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.6495726495726495) internal successors, (193), 116 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-02-15 02:06:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:10,568 INFO L225 Difference]: With dead ends: 535 [2022-02-15 02:06:10,569 INFO L226 Difference]: Without dead ends: 345 [2022-02-15 02:06:10,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16001 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=12298, Invalid=42224, Unknown=0, NotChecked=0, Total=54522 [2022-02-15 02:06:10,572 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 609 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 11186 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 11837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 11186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:10,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 64 Invalid, 11837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 11186 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-15 02:06:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-15 02:06:10,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-02-15 02:06:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.0147058823529411) internal successors, (345), 340 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 349 transitions. [2022-02-15 02:06:10,585 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 349 transitions. Word has length 197 [2022-02-15 02:06:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:10,586 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 349 transitions. [2022-02-15 02:06:10,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.6495726495726495) internal successors, (193), 116 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 349 transitions. [2022-02-15 02:06:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-02-15 02:06:10,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:10,587 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:10,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 02:06:10,587 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:10,587 INFO L85 PathProgramCache]: Analyzing trace with hash -243023257, now seen corresponding path program 40 times [2022-02-15 02:06:10,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:10,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115616632] [2022-02-15 02:06:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:10,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:10,639 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 02:06:10,639 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:10,663 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 02:06:10,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:10,713 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:10,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:11,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:11,497 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 02:06:14,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:14,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115616632] [2022-02-15 02:06:14,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115616632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:14,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:14,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-15 02:06:14,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099104123] [2022-02-15 02:06:14,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:14,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-15 02:06:14,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-15 02:06:14,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4374, Invalid=10388, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 02:06:14,057 INFO L87 Difference]: Start difference. First operand 345 states and 349 transitions. Second operand has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:22,583 INFO L93 Difference]: Finished difference Result 539 states and 549 transitions. [2022-02-15 02:06:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-15 02:06:22,584 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-02-15 02:06:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:22,585 INFO L225 Difference]: With dead ends: 539 [2022-02-15 02:06:22,585 INFO L226 Difference]: Without dead ends: 348 [2022-02-15 02:06:22,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16587 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=12781, Invalid=43625, Unknown=0, NotChecked=0, Total=56406 [2022-02-15 02:06:22,589 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 623 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 11578 mSolverCounterSat, 661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 12239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 661 IncrementalHoareTripleChecker+Valid, 11578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:22,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 44 Invalid, 12239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [661 Valid, 11578 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 02:06:22,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-15 02:06:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2022-02-15 02:06:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.0145772594752187) internal successors, (348), 343 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 352 transitions. [2022-02-15 02:06:22,607 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 352 transitions. Word has length 200 [2022-02-15 02:06:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:22,607 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 352 transitions. [2022-02-15 02:06:22,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 352 transitions. [2022-02-15 02:06:22,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-02-15 02:06:22,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:22,608 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:22,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 02:06:22,609 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:22,609 INFO L85 PathProgramCache]: Analyzing trace with hash 484571639, now seen corresponding path program 41 times [2022-02-15 02:06:22,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:22,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520635210] [2022-02-15 02:06:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:22,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:22,678 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 02:06:22,678 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:22,698 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 02:06:22,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:22,751 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:22,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:23,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:23,509 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 02:06:26,061 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:26,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520635210] [2022-02-15 02:06:26,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1520635210] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:26,061 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:26,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-02-15 02:06:26,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603997464] [2022-02-15 02:06:26,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:26,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-15 02:06:26,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-15 02:06:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4540, Invalid=10712, Unknown=0, NotChecked=0, Total=15252 [2022-02-15 02:06:26,065 INFO L87 Difference]: Start difference. First operand 348 states and 352 transitions. Second operand has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:34,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:34,444 INFO L93 Difference]: Finished difference Result 543 states and 553 transitions. [2022-02-15 02:06:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-15 02:06:34,445 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-02-15 02:06:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:34,446 INFO L225 Difference]: With dead ends: 543 [2022-02-15 02:06:34,446 INFO L226 Difference]: Without dead ends: 351 [2022-02-15 02:06:34,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17183 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=13273, Invalid=45049, Unknown=0, NotChecked=0, Total=58322 [2022-02-15 02:06:34,450 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 319 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 11702 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 12060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 11702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:34,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 39 Invalid, 12060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 11702 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-15 02:06:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-15 02:06:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-02-15 02:06:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.0144508670520231) internal successors, (351), 346 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 355 transitions. [2022-02-15 02:06:34,477 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 355 transitions. Word has length 203 [2022-02-15 02:06:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:34,477 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 355 transitions. [2022-02-15 02:06:34,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 355 transitions. [2022-02-15 02:06:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-02-15 02:06:34,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:34,479 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:34,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 02:06:34,479 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash -212262319, now seen corresponding path program 42 times [2022-02-15 02:06:34,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:34,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148870687] [2022-02-15 02:06:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:34,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:34,586 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 02:06:34,587 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:34,615 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 02:06:34,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:34,655 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:35,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:35,310 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 02:06:37,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:37,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148870687] [2022-02-15 02:06:37,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [148870687] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:37,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:37,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-02-15 02:06:37,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089150164] [2022-02-15 02:06:37,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:37,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-02-15 02:06:37,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-02-15 02:06:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4533, Invalid=10473, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 02:06:37,940 INFO L87 Difference]: Start difference. First operand 351 states and 355 transitions. Second operand has 123 states, 123 states have (on average 1.6422764227642277) internal successors, (202), 122 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:46,550 INFO L93 Difference]: Finished difference Result 555 states and 573 transitions. [2022-02-15 02:06:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-15 02:06:46,551 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.6422764227642277) internal successors, (202), 122 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-02-15 02:06:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:46,552 INFO L225 Difference]: With dead ends: 555 [2022-02-15 02:06:46,552 INFO L226 Difference]: Without dead ends: 362 [2022-02-15 02:06:46,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17044 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=13593, Invalid=45213, Unknown=0, NotChecked=0, Total=58806 [2022-02-15 02:06:46,556 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 321 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11836 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 11836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:46,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 34 Invalid, 12287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 11836 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-15 02:06:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-15 02:06:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 212. [2022-02-15 02:06:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 207 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2022-02-15 02:06:46,564 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 206 [2022-02-15 02:06:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:46,564 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2022-02-15 02:06:46,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.6422764227642277) internal successors, (202), 122 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2022-02-15 02:06:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-02-15 02:06:46,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:46,565 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:46,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 02:06:46,565 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:46,565 INFO L85 PathProgramCache]: Analyzing trace with hash 671791144, now seen corresponding path program 43 times [2022-02-15 02:06:46,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:46,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302015780] [2022-02-15 02:06:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:46,602 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:46,641 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 02:06:46,641 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:46,668 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 02:06:46,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:46,728 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:46,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:47,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:47,568 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 02:06:50,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:50,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302015780] [2022-02-15 02:06:50,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302015780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:50,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:50,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-15 02:06:50,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702177134] [2022-02-15 02:06:50,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:50,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-15 02:06:50,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:50,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-15 02:06:50,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4929, Invalid=11583, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 02:06:50,333 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand has 126 states, 126 states have (on average 1.6428571428571428) internal successors, (207), 125 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:59,745 INFO L93 Difference]: Finished difference Result 573 states and 584 transitions. [2022-02-15 02:06:59,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-15 02:06:59,746 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.6428571428571428) internal successors, (207), 125 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-02-15 02:06:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:59,747 INFO L225 Difference]: With dead ends: 573 [2022-02-15 02:06:59,747 INFO L226 Difference]: Without dead ends: 369 [2022-02-15 02:06:59,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18665 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=14426, Invalid=48826, Unknown=0, NotChecked=0, Total=63252 [2022-02-15 02:06:59,752 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 492 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 12650 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 12650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:59,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 39 Invalid, 13184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 12650 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-15 02:06:59,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-02-15 02:06:59,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2022-02-15 02:06:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 364 states have (on average 1.0137362637362637) internal successors, (369), 364 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 373 transitions. [2022-02-15 02:06:59,767 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 373 transitions. Word has length 211 [2022-02-15 02:06:59,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:59,767 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 373 transitions. [2022-02-15 02:06:59,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.6428571428571428) internal successors, (207), 125 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:59,767 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 373 transitions. [2022-02-15 02:06:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-02-15 02:06:59,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:59,768 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:59,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 02:06:59,768 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 811881792, now seen corresponding path program 44 times [2022-02-15 02:06:59,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:59,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423011961] [2022-02-15 02:06:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:59,826 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:59,852 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 02:06:59,853 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:59,896 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 02:06:59,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:59,940 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:59,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:00,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:00,642 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 02:07:03,589 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:03,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423011961] [2022-02-15 02:07:03,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [423011961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:03,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:03,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-02-15 02:07:03,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711125056] [2022-02-15 02:07:03,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:03,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-02-15 02:07:03,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:03,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-02-15 02:07:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4922, Invalid=11334, Unknown=0, NotChecked=0, Total=16256 [2022-02-15 02:07:03,591 INFO L87 Difference]: Start difference. First operand 369 states and 373 transitions. Second operand has 128 states, 128 states have (on average 1.640625) internal successors, (210), 127 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:12,823 INFO L93 Difference]: Finished difference Result 581 states and 595 transitions. [2022-02-15 02:07:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-15 02:07:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.640625) internal successors, (210), 127 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-02-15 02:07:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:12,825 INFO L225 Difference]: With dead ends: 581 [2022-02-15 02:07:12,826 INFO L226 Difference]: Without dead ends: 376 [2022-02-15 02:07:12,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18521 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=14760, Invalid=48996, Unknown=0, NotChecked=0, Total=63756 [2022-02-15 02:07:12,830 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 415 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 12726 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 12947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 12726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:12,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 44 Invalid, 12947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 12726 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 02:07:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-15 02:07:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 220. [2022-02-15 02:07:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 215 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-02-15 02:07:12,841 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 214 [2022-02-15 02:07:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:12,841 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-02-15 02:07:12,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.640625) internal successors, (210), 127 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-02-15 02:07:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-02-15 02:07:12,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:12,842 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:12,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 02:07:12,842 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1508078311, now seen corresponding path program 45 times [2022-02-15 02:07:12,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:12,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386604345] [2022-02-15 02:07:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:12,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:12,905 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 02:07:12,906 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:12,931 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 02:07:12,970 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:12,970 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:12,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:13,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:13,715 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 02:07:16,680 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:16,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386604345] [2022-02-15 02:07:16,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [386604345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:16,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:16,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-02-15 02:07:16,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662254207] [2022-02-15 02:07:16,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:16,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-02-15 02:07:16,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:16,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-02-15 02:07:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5147, Invalid=11883, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 02:07:16,684 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 131 states, 131 states have (on average 1.6412213740458015) internal successors, (215), 130 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:26,489 INFO L93 Difference]: Finished difference Result 437 states and 448 transitions. [2022-02-15 02:07:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-15 02:07:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.6412213740458015) internal successors, (215), 130 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-02-15 02:07:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:26,490 INFO L225 Difference]: With dead ends: 437 [2022-02-15 02:07:26,490 INFO L226 Difference]: Without dead ends: 225 [2022-02-15 02:07:26,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19414 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=15435, Invalid=51387, Unknown=0, NotChecked=0, Total=66822 [2022-02-15 02:07:26,493 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 427 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13470 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 14031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 13470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:26,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 64 Invalid, 14031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 13470 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-15 02:07:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-15 02:07:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-02-15 02:07:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-02-15 02:07:26,501 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 219 [2022-02-15 02:07:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:26,501 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-02-15 02:07:26,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.6412213740458015) internal successors, (215), 130 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-02-15 02:07:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-02-15 02:07:26,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:26,502 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:26,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 02:07:26,502 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash 302861364, now seen corresponding path program 46 times [2022-02-15 02:07:26,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:26,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065961915] [2022-02-15 02:07:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:26,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:26,795 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 02:07:26,795 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:26,813 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 02:07:26,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:26,880 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:26,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:27,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:27,712 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 02:07:30,770 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:30,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065961915] [2022-02-15 02:07:30,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1065961915] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:30,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:30,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-15 02:07:30,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145471026] [2022-02-15 02:07:30,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:30,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-15 02:07:30,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-15 02:07:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5377, Invalid=12445, Unknown=0, NotChecked=0, Total=17822 [2022-02-15 02:07:30,773 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:41,108 INFO L93 Difference]: Finished difference Result 447 states and 458 transitions. [2022-02-15 02:07:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-15 02:07:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-02-15 02:07:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:41,110 INFO L225 Difference]: With dead ends: 447 [2022-02-15 02:07:41,110 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 02:07:41,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20328 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=16125, Invalid=53835, Unknown=0, NotChecked=0, Total=69960 [2022-02-15 02:07:41,113 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 522 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 14159 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 14819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 14159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:41,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 94 Invalid, 14819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 14159 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-15 02:07:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 02:07:41,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-02-15 02:07:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 225 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 233 transitions. [2022-02-15 02:07:41,121 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 233 transitions. Word has length 224 [2022-02-15 02:07:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:41,121 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 233 transitions. [2022-02-15 02:07:41,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 233 transitions. [2022-02-15 02:07:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-02-15 02:07:41,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:41,122 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:41,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 02:07:41,124 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash 811252005, now seen corresponding path program 47 times [2022-02-15 02:07:41,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:41,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051619710] [2022-02-15 02:07:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:41,176 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:41,202 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 02:07:41,202 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:41,222 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 02:07:41,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:41,261 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:42,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:42,104 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 02:07:45,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:45,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051619710] [2022-02-15 02:07:45,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051619710] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:45,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:45,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-02-15 02:07:45,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725675916] [2022-02-15 02:07:45,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:45,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-02-15 02:07:45,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:45,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-02-15 02:07:45,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5612, Invalid=13020, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 02:07:45,418 INFO L87 Difference]: Start difference. First operand 230 states and 233 transitions. Second operand has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:56,409 INFO L93 Difference]: Finished difference Result 457 states and 468 transitions. [2022-02-15 02:07:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-15 02:07:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-02-15 02:07:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:56,410 INFO L225 Difference]: With dead ends: 457 [2022-02-15 02:07:56,410 INFO L226 Difference]: Without dead ends: 235 [2022-02-15 02:07:56,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21310 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=16830, Invalid=56340, Unknown=0, NotChecked=0, Total=73170 [2022-02-15 02:07:56,413 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 447 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14776 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 14776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:56,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 39 Invalid, 15363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 14776 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-15 02:07:56,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-15 02:07:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-02-15 02:07:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2022-02-15 02:07:56,421 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 229 [2022-02-15 02:07:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:56,422 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2022-02-15 02:07:56,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2022-02-15 02:07:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-02-15 02:07:56,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:56,423 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:56,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 02:07:56,423 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2042834216, now seen corresponding path program 48 times [2022-02-15 02:07:56,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:56,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378090427] [2022-02-15 02:07:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:56,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:56,502 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 02:07:56,502 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:56,521 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 02:07:56,572 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:56,573 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:57,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:57,444 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 02:08:00,873 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:00,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378090427] [2022-02-15 02:08:00,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [378090427] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:00,874 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:00,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-15 02:08:00,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258046761] [2022-02-15 02:08:00,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:00,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-15 02:08:00,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:00,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-15 02:08:00,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5852, Invalid=13608, Unknown=0, NotChecked=0, Total=19460 [2022-02-15 02:08:00,876 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:12,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:12,051 INFO L93 Difference]: Finished difference Result 467 states and 478 transitions. [2022-02-15 02:08:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-15 02:08:12,052 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-02-15 02:08:12,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:12,052 INFO L225 Difference]: With dead ends: 467 [2022-02-15 02:08:12,052 INFO L226 Difference]: Without dead ends: 240 [2022-02-15 02:08:12,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22219 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=17550, Invalid=58902, Unknown=0, NotChecked=0, Total=76452 [2022-02-15 02:08:12,056 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 546 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15481 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 15481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:12,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 29 Invalid, 16171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 15481 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-15 02:08:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-15 02:08:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-15 02:08:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-02-15 02:08:12,065 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 234 [2022-02-15 02:08:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:12,065 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-02-15 02:08:12,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-02-15 02:08:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-15 02:08:12,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:12,066 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:12,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 02:08:12,066 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:12,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1308465969, now seen corresponding path program 49 times [2022-02-15 02:08:12,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:12,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31603892] [2022-02-15 02:08:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:12,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:12,132 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 02:08:12,132 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:12,150 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 02:08:12,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:12,188 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:12,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:13,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:13,173 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 02:08:16,648 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:16,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31603892] [2022-02-15 02:08:16,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [31603892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:16,649 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:16,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-02-15 02:08:16,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378007993] [2022-02-15 02:08:16,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:16,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-02-15 02:08:16,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-02-15 02:08:16,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6097, Invalid=14209, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 02:08:16,651 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:28,371 INFO L93 Difference]: Finished difference Result 477 states and 488 transitions. [2022-02-15 02:08:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-15 02:08:28,372 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-02-15 02:08:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:28,373 INFO L225 Difference]: With dead ends: 477 [2022-02-15 02:08:28,373 INFO L226 Difference]: Without dead ends: 245 [2022-02-15 02:08:28,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23196 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=18285, Invalid=61521, Unknown=0, NotChecked=0, Total=79806 [2022-02-15 02:08:28,376 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 373 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 16225 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 16749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 16225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:28,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 64 Invalid, 16749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 16225 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-02-15 02:08:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-15 02:08:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-02-15 02:08:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2022-02-15 02:08:28,384 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 239 [2022-02-15 02:08:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:28,385 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2022-02-15 02:08:28,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2022-02-15 02:08:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-02-15 02:08:28,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:28,386 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:28,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 02:08:28,386 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:28,386 INFO L85 PathProgramCache]: Analyzing trace with hash -124602340, now seen corresponding path program 50 times [2022-02-15 02:08:28,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:28,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900540573] [2022-02-15 02:08:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:28,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:28,454 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 02:08:28,454 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:28,496 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 02:08:28,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:28,537 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:28,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:29,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:29,516 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 02:08:33,160 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:33,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900540573] [2022-02-15 02:08:33,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900540573] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:33,160 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:33,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-02-15 02:08:33,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451769903] [2022-02-15 02:08:33,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:33,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-15 02:08:33,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-15 02:08:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6347, Invalid=14823, Unknown=0, NotChecked=0, Total=21170 [2022-02-15 02:08:33,163 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:45,295 INFO L93 Difference]: Finished difference Result 487 states and 498 transitions. [2022-02-15 02:08:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-15 02:08:45,296 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2022-02-15 02:08:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:45,297 INFO L225 Difference]: With dead ends: 487 [2022-02-15 02:08:45,297 INFO L226 Difference]: Without dead ends: 250 [2022-02-15 02:08:45,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24194 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=19035, Invalid=64197, Unknown=0, NotChecked=0, Total=83232 [2022-02-15 02:08:45,302 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 383 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 16912 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 17444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 16912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:45,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 54 Invalid, 17444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 16912 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-15 02:08:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-15 02:08:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-02-15 02:08:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0163265306122449) internal successors, (249), 245 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 253 transitions. [2022-02-15 02:08:45,313 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 253 transitions. Word has length 244 [2022-02-15 02:08:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:45,313 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 253 transitions. [2022-02-15 02:08:45,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 253 transitions. [2022-02-15 02:08:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-02-15 02:08:45,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:45,314 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:45,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 02:08:45,315 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1718062275, now seen corresponding path program 51 times [2022-02-15 02:08:45,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:45,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304545024] [2022-02-15 02:08:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:45,365 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:45,390 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 02:08:45,390 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:45,410 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 02:08:45,449 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:45,450 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:45,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:46,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:46,411 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 02:08:50,228 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:50,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304545024] [2022-02-15 02:08:50,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304545024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:50,228 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:50,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-02-15 02:08:50,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765949655] [2022-02-15 02:08:50,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:50,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-02-15 02:08:50,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:50,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-02-15 02:08:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6602, Invalid=15450, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 02:08:50,231 INFO L87 Difference]: Start difference. First operand 250 states and 253 transitions. Second operand has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:03,079 INFO L93 Difference]: Finished difference Result 497 states and 508 transitions. [2022-02-15 02:09:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-15 02:09:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-02-15 02:09:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:03,081 INFO L225 Difference]: With dead ends: 497 [2022-02-15 02:09:03,081 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 02:09:03,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25213 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=19800, Invalid=66930, Unknown=0, NotChecked=0, Total=86730 [2022-02-15 02:09:03,085 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 487 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17598 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 17598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:03,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 29 Invalid, 18138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 17598 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-02-15 02:09:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 02:09:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-02-15 02:09:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-02-15 02:09:03,094 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 249 [2022-02-15 02:09:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:03,094 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-02-15 02:09:03,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-02-15 02:09:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-02-15 02:09:03,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:03,095 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:03,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 02:09:03,095 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:03,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:03,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1095281936, now seen corresponding path program 52 times [2022-02-15 02:09:03,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:03,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283221053] [2022-02-15 02:09:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:03,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:03,161 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 02:09:03,161 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:03,189 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 02:09:03,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:03,247 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:03,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:04,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:04,324 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 02:09:08,238 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:08,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283221053] [2022-02-15 02:09:08,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283221053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:08,238 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:08,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-02-15 02:09:08,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033556001] [2022-02-15 02:09:08,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:08,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-02-15 02:09:08,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-02-15 02:09:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7077, Invalid=16793, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 02:09:08,241 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:21,700 INFO L93 Difference]: Finished difference Result 693 states and 704 transitions. [2022-02-15 02:09:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-02-15 02:09:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-02-15 02:09:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:21,702 INFO L225 Difference]: With dead ends: 693 [2022-02-15 02:09:21,702 INFO L226 Difference]: Without dead ends: 446 [2022-02-15 02:09:21,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27180 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=20800, Invalid=71312, Unknown=0, NotChecked=0, Total=92112 [2022-02-15 02:09:21,706 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 497 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 18896 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 19444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 18896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:21,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 54 Invalid, 19444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 18896 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-15 02:09:21,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-02-15 02:09:21,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2022-02-15 02:09:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 441 states have (on average 1.0113378684807257) internal successors, (446), 441 states have internal predecessors, (446), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 450 transitions. [2022-02-15 02:09:21,721 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 450 transitions. Word has length 254 [2022-02-15 02:09:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:21,722 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 450 transitions. [2022-02-15 02:09:21,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 450 transitions. [2022-02-15 02:09:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-02-15 02:09:21,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:21,723 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:21,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 02:09:21,723 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:21,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1325818414, now seen corresponding path program 53 times [2022-02-15 02:09:21,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:21,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146039930] [2022-02-15 02:09:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:21,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:21,801 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 02:09:21,801 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:21,826 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 02:09:21,872 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:21,872 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:21,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:23,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:27,034 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:27,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146039930] [2022-02-15 02:09:27,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [146039930] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:27,034 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:27,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-02-15 02:09:27,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985906669] [2022-02-15 02:09:27,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:27,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-02-15 02:09:27,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:27,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-02-15 02:09:27,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7288, Invalid=17204, Unknown=0, NotChecked=0, Total=24492 [2022-02-15 02:09:27,037 INFO L87 Difference]: Start difference. First operand 446 states and 450 transitions. Second operand has 154 states, 154 states have (on average 1.6428571428571428) internal successors, (253), 153 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:40,950 INFO L93 Difference]: Finished difference Result 697 states and 707 transitions. [2022-02-15 02:09:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-02-15 02:09:40,950 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.6428571428571428) internal successors, (253), 153 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-02-15 02:09:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:40,952 INFO L225 Difference]: With dead ends: 697 [2022-02-15 02:09:40,952 INFO L226 Difference]: Without dead ends: 449 [2022-02-15 02:09:40,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27941 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=21427, Invalid=73129, Unknown=0, NotChecked=0, Total=94556 [2022-02-15 02:09:40,957 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 600 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19090 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 19090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:40,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 39 Invalid, 19741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 19090 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-02-15 02:09:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-15 02:09:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2022-02-15 02:09:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 444 states have (on average 1.0112612612612613) internal successors, (449), 444 states have internal predecessors, (449), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 453 transitions. [2022-02-15 02:09:40,997 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 453 transitions. Word has length 257 [2022-02-15 02:09:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:40,998 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 453 transitions. [2022-02-15 02:09:40,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.6428571428571428) internal successors, (253), 153 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 453 transitions. [2022-02-15 02:09:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-02-15 02:09:40,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:40,999 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:40,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 02:09:41,000 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776570, now seen corresponding path program 54 times [2022-02-15 02:09:41,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:41,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453223462] [2022-02-15 02:09:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:41,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:41,079 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 02:09:41,080 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:41,103 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 02:09:41,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:41,142 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:42,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:46,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:46,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453223462] [2022-02-15 02:09:46,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453223462] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:46,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:46,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-02-15 02:09:46,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143946658] [2022-02-15 02:09:46,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:46,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-02-15 02:09:46,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:46,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-02-15 02:09:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7281, Invalid=16899, Unknown=0, NotChecked=0, Total=24180 [2022-02-15 02:09:46,262 INFO L87 Difference]: Start difference. First operand 449 states and 453 transitions. Second operand has 156 states, 156 states have (on average 1.641025641025641) internal successors, (256), 155 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:00,158 INFO L93 Difference]: Finished difference Result 707 states and 723 transitions. [2022-02-15 02:10:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-02-15 02:10:00,159 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.641025641025641) internal successors, (256), 155 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2022-02-15 02:10:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:00,160 INFO L225 Difference]: With dead ends: 707 [2022-02-15 02:10:00,160 INFO L226 Difference]: Without dead ends: 458 [2022-02-15 02:10:00,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27763 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=21837, Invalid=73335, Unknown=0, NotChecked=0, Total=95172 [2022-02-15 02:10:00,163 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 306 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19239 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 19239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:00,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 39 Invalid, 19604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 19239 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-15 02:10:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-15 02:10:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 266. [2022-02-15 02:10:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.0153256704980842) internal successors, (265), 261 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 269 transitions. [2022-02-15 02:10:00,173 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 269 transitions. Word has length 260 [2022-02-15 02:10:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:00,173 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 269 transitions. [2022-02-15 02:10:00,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.641025641025641) internal successors, (256), 155 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 269 transitions. [2022-02-15 02:10:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-02-15 02:10:00,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:00,174 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:00,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 02:10:00,175 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2082080801, now seen corresponding path program 55 times [2022-02-15 02:10:00,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:00,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355076413] [2022-02-15 02:10:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:00,213 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:00,246 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 02:10:00,246 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:00,273 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 02:10:00,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:00,310 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:00,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:01,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:01,398 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 02:10:05,769 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:05,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355076413] [2022-02-15 02:10:05,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [355076413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:05,769 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:05,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-02-15 02:10:05,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044140248] [2022-02-15 02:10:05,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:05,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-02-15 02:10:05,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-02-15 02:10:05,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7554, Invalid=17568, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 02:10:05,772 INFO L87 Difference]: Start difference. First operand 266 states and 269 transitions. Second operand has 159 states, 159 states have (on average 1.6415094339622642) internal successors, (261), 158 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:20,093 INFO L93 Difference]: Finished difference Result 529 states and 540 transitions. [2022-02-15 02:10:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-15 02:10:20,094 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.6415094339622642) internal successors, (261), 158 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-02-15 02:10:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:20,095 INFO L225 Difference]: With dead ends: 529 [2022-02-15 02:10:20,095 INFO L226 Difference]: Without dead ends: 271 [2022-02-15 02:10:20,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28854 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=22656, Invalid=76254, Unknown=0, NotChecked=0, Total=98910 [2022-02-15 02:10:20,099 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 517 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 20006 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 20685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 20006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:20,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 69 Invalid, 20685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 20006 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-02-15 02:10:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-02-15 02:10:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-02-15 02:10:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0150375939849625) internal successors, (270), 266 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 274 transitions. [2022-02-15 02:10:20,123 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 274 transitions. Word has length 265 [2022-02-15 02:10:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:20,124 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 274 transitions. [2022-02-15 02:10:20,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.6415094339622642) internal successors, (261), 158 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 274 transitions. [2022-02-15 02:10:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-02-15 02:10:20,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:20,125 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:20,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 02:10:20,125 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1405359954, now seen corresponding path program 56 times [2022-02-15 02:10:20,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:20,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150034304] [2022-02-15 02:10:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:20,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:20,205 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 02:10:20,205 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:20,225 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 02:10:20,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:20,267 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:20,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:21,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:21,389 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 02:10:25,819 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:25,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150034304] [2022-02-15 02:10:25,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [150034304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:25,819 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:25,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-02-15 02:10:25,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975128538] [2022-02-15 02:10:25,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:25,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-02-15 02:10:25,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:25,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-02-15 02:10:25,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7832, Invalid=18250, Unknown=0, NotChecked=0, Total=26082 [2022-02-15 02:10:25,823 INFO L87 Difference]: Start difference. First operand 271 states and 274 transitions. Second operand has 162 states, 162 states have (on average 1.6419753086419753) internal successors, (266), 161 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:40,999 INFO L93 Difference]: Finished difference Result 539 states and 550 transitions. [2022-02-15 02:10:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-02-15 02:10:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 1.6419753086419753) internal successors, (266), 161 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-02-15 02:10:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:41,001 INFO L225 Difference]: With dead ends: 539 [2022-02-15 02:10:41,001 INFO L226 Difference]: Without dead ends: 276 [2022-02-15 02:10:41,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29966 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=23490, Invalid=79230, Unknown=0, NotChecked=0, Total=102720 [2022-02-15 02:10:41,005 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 524 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 20718 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 20718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:41,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 44 Invalid, 21202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 20718 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-02-15 02:10:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-15 02:10:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-02-15 02:10:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 279 transitions. [2022-02-15 02:10:41,040 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 279 transitions. Word has length 270 [2022-02-15 02:10:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:41,040 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 279 transitions. [2022-02-15 02:10:41,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 1.6419753086419753) internal successors, (266), 161 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 279 transitions. [2022-02-15 02:10:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-02-15 02:10:41,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:41,041 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:41,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 02:10:41,041 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:41,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1860301461, now seen corresponding path program 57 times [2022-02-15 02:10:41,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:41,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309299673] [2022-02-15 02:10:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:41,093 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:41,119 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 02:10:41,119 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:41,144 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 02:10:41,197 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:41,197 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:42,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:42,363 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 02:10:47,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:47,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309299673] [2022-02-15 02:10:47,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1309299673] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:47,016 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:47,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-02-15 02:10:47,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731356878] [2022-02-15 02:10:47,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:47,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-02-15 02:10:47,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-02-15 02:10:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8115, Invalid=18945, Unknown=0, NotChecked=0, Total=27060 [2022-02-15 02:10:47,019 INFO L87 Difference]: Start difference. First operand 276 states and 279 transitions. Second operand has 165 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 164 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:02,513 INFO L93 Difference]: Finished difference Result 549 states and 560 transitions. [2022-02-15 02:11:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-02-15 02:11:02,514 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 164 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-02-15 02:11:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:02,515 INFO L225 Difference]: With dead ends: 549 [2022-02-15 02:11:02,515 INFO L226 Difference]: Without dead ends: 281 [2022-02-15 02:11:02,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31099 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=24339, Invalid=82263, Unknown=0, NotChecked=0, Total=106602 [2022-02-15 02:11:02,521 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 536 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 21714 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 22417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 21714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:02,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 54 Invalid, 22417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 21714 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-15 02:11:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-15 02:11:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-02-15 02:11:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 276 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 284 transitions. [2022-02-15 02:11:02,533 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 284 transitions. Word has length 275 [2022-02-15 02:11:02,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:02,534 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 284 transitions. [2022-02-15 02:11:02,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 164 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 284 transitions. [2022-02-15 02:11:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-02-15 02:11:02,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:02,535 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:02,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 02:11:02,535 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:02,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:02,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1603072034, now seen corresponding path program 58 times [2022-02-15 02:11:02,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:02,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550548470] [2022-02-15 02:11:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:02,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:02,665 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 02:11:02,665 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:02,693 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 02:11:02,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:02,749 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:02,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:04,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:09,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:09,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550548470] [2022-02-15 02:11:09,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550548470] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:09,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:09,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-02-15 02:11:09,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46708312] [2022-02-15 02:11:09,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:09,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-02-15 02:11:09,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:09,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-02-15 02:11:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8640, Invalid=20430, Unknown=0, NotChecked=0, Total=29070 [2022-02-15 02:11:09,077 INFO L87 Difference]: Start difference. First operand 281 states and 284 transitions. Second operand has 168 states, 168 states have (on average 1.6428571428571428) internal successors, (276), 167 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:25,357 INFO L93 Difference]: Finished difference Result 765 states and 776 transitions. [2022-02-15 02:11:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-02-15 02:11:25,358 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.6428571428571428) internal successors, (276), 167 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2022-02-15 02:11:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:25,359 INFO L225 Difference]: With dead ends: 765 [2022-02-15 02:11:25,360 INFO L226 Difference]: Without dead ends: 492 [2022-02-15 02:11:25,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33278 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=25445, Invalid=87115, Unknown=0, NotChecked=0, Total=112560 [2022-02-15 02:11:25,366 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 439 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 22677 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 22677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:25,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 39 Invalid, 23172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 22677 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 02:11:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-02-15 02:11:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2022-02-15 02:11:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 487 states have (on average 1.0102669404517455) internal successors, (492), 487 states have internal predecessors, (492), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 496 transitions. [2022-02-15 02:11:25,388 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 496 transitions. Word has length 280 [2022-02-15 02:11:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:25,388 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 496 transitions. [2022-02-15 02:11:25,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.6428571428571428) internal successors, (276), 167 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 496 transitions. [2022-02-15 02:11:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-02-15 02:11:25,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:25,390 INFO L514 BasicCegarLoop]: trace histogram [106, 105, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:25,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 02:11:25,390 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:25,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2121099876, now seen corresponding path program 59 times [2022-02-15 02:11:25,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:25,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597999522] [2022-02-15 02:11:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:25,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:25,457 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 02:11:25,457 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:25,482 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 02:11:25,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:25,527 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:25,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:26,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:31,547 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:31,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597999522] [2022-02-15 02:11:31,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [597999522] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:31,547 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:31,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-02-15 02:11:31,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492292763] [2022-02-15 02:11:31,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:31,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-02-15 02:11:31,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-02-15 02:11:31,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8633, Invalid=20097, Unknown=0, NotChecked=0, Total=28730 [2022-02-15 02:11:31,550 INFO L87 Difference]: Start difference. First operand 492 states and 496 transitions. Second operand has 170 states, 170 states have (on average 1.6411764705882352) internal successors, (279), 169 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:48,080 INFO L93 Difference]: Finished difference Result 773 states and 787 transitions. [2022-02-15 02:11:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-02-15 02:11:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.6411764705882352) internal successors, (279), 169 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-02-15 02:11:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:48,082 INFO L225 Difference]: With dead ends: 773 [2022-02-15 02:11:48,082 INFO L226 Difference]: Without dead ends: 499 [2022-02-15 02:11:48,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33083 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=25893, Invalid=87339, Unknown=0, NotChecked=0, Total=113232 [2022-02-15 02:11:48,086 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 551 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22942 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 23341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 22942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:48,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 79 Invalid, 23341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 22942 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-02-15 02:11:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-02-15 02:11:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 289. [2022-02-15 02:11:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0140845070422535) internal successors, (288), 284 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 292 transitions. [2022-02-15 02:11:48,096 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 292 transitions. Word has length 283 [2022-02-15 02:11:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:48,096 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 292 transitions. [2022-02-15 02:11:48,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.6411764705882352) internal successors, (279), 169 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 292 transitions. [2022-02-15 02:11:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-02-15 02:11:48,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:48,098 INFO L514 BasicCegarLoop]: trace histogram [108, 107, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:48,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 02:11:48,098 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1243806703, now seen corresponding path program 60 times [2022-02-15 02:11:48,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:48,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861027773] [2022-02-15 02:11:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:48,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:48,164 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 02:11:48,165 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:48,182 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 02:11:48,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:48,220 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:48,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:49,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:54,475 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:54,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861027773] [2022-02-15 02:11:54,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861027773] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:54,475 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:54,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2022-02-15 02:11:54,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706174875] [2022-02-15 02:11:54,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:54,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-02-15 02:11:54,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:54,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-02-15 02:11:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8930, Invalid=20826, Unknown=0, NotChecked=0, Total=29756 [2022-02-15 02:11:54,478 INFO L87 Difference]: Start difference. First operand 289 states and 292 transitions. Second operand has 173 states, 173 states have (on average 1.6416184971098267) internal successors, (284), 172 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:11,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:11,872 INFO L93 Difference]: Finished difference Result 575 states and 586 transitions. [2022-02-15 02:12:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-15 02:12:11,872 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.6416184971098267) internal successors, (284), 172 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 288 [2022-02-15 02:12:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:11,874 INFO L225 Difference]: With dead ends: 575 [2022-02-15 02:12:11,874 INFO L226 Difference]: Without dead ends: 294 [2022-02-15 02:12:11,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34273 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=26784, Invalid=90522, Unknown=0, NotChecked=0, Total=117306 [2022-02-15 02:12:11,880 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 23653 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 24055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 23653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:11,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 49 Invalid, 24055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 23653 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-02-15 02:12:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-15 02:12:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-02-15 02:12:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 289 states have (on average 1.013840830449827) internal successors, (293), 289 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 297 transitions. [2022-02-15 02:12:11,894 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 297 transitions. Word has length 288 [2022-02-15 02:12:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:11,894 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 297 transitions. [2022-02-15 02:12:11,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.6416184971098267) internal successors, (284), 172 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 297 transitions. [2022-02-15 02:12:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-02-15 02:12:11,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:11,896 INFO L514 BasicCegarLoop]: trace histogram [110, 109, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:11,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 02:12:11,896 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash -43299608, now seen corresponding path program 61 times [2022-02-15 02:12:11,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:11,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552650589] [2022-02-15 02:12:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:11,938 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:11,964 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 02:12:11,964 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:11,991 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 02:12:12,028 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:12,029 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:13,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:13,328 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 02:12:18,560 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:18,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552650589] [2022-02-15 02:12:18,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552650589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:18,560 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:18,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2022-02-15 02:12:18,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527260600] [2022-02-15 02:12:18,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:18,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-02-15 02:12:18,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-02-15 02:12:18,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9232, Invalid=21568, Unknown=0, NotChecked=0, Total=30800 [2022-02-15 02:12:18,564 INFO L87 Difference]: Start difference. First operand 294 states and 297 transitions. Second operand has 176 states, 176 states have (on average 1.6420454545454546) internal successors, (289), 175 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:36,459 INFO L93 Difference]: Finished difference Result 585 states and 596 transitions. [2022-02-15 02:12:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-02-15 02:12:36,459 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.6420454545454546) internal successors, (289), 175 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-02-15 02:12:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:36,460 INFO L225 Difference]: With dead ends: 585 [2022-02-15 02:12:36,460 INFO L226 Difference]: Without dead ends: 299 [2022-02-15 02:12:36,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35484 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=27690, Invalid=93762, Unknown=0, NotChecked=0, Total=121452 [2022-02-15 02:12:36,466 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 572 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24575 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 24575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:36,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 34 Invalid, 25213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 24575 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-02-15 02:12:36,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-15 02:12:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-02-15 02:12:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0136054421768708) internal successors, (298), 294 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 302 transitions. [2022-02-15 02:12:36,492 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 302 transitions. Word has length 293 [2022-02-15 02:12:36,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:36,493 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 302 transitions. [2022-02-15 02:12:36,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.6420454545454546) internal successors, (289), 175 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:36,493 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 302 transitions. [2022-02-15 02:12:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-02-15 02:12:36,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:36,494 INFO L514 BasicCegarLoop]: trace histogram [112, 111, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:36,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 02:12:36,494 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:36,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash -986857019, now seen corresponding path program 62 times [2022-02-15 02:12:36,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:36,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808021400] [2022-02-15 02:12:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:36,531 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:36,551 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 02:12:36,551 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:36,576 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 02:12:36,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:36,613 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:36,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:37,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:37,955 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 02:12:43,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:43,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808021400] [2022-02-15 02:12:43,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808021400] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:43,284 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:43,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [179] imperfect sequences [] total 179 [2022-02-15 02:12:43,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329568313] [2022-02-15 02:12:43,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:43,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-02-15 02:12:43,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:43,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-02-15 02:12:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9539, Invalid=22323, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 02:12:43,287 INFO L87 Difference]: Start difference. First operand 299 states and 302 transitions. Second operand has 179 states, 179 states have (on average 1.6424581005586592) internal successors, (294), 178 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:01,631 INFO L93 Difference]: Finished difference Result 595 states and 606 transitions. [2022-02-15 02:13:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-02-15 02:13:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 1.6424581005586592) internal successors, (294), 178 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2022-02-15 02:13:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:01,632 INFO L225 Difference]: With dead ends: 595 [2022-02-15 02:13:01,633 INFO L226 Difference]: Without dead ends: 304 [2022-02-15 02:13:01,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36716 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=28611, Invalid=97059, Unknown=0, NotChecked=0, Total=125670 [2022-02-15 02:13:01,640 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 582 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25510 mSolverCounterSat, 763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 26273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 25510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:01,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 44 Invalid, 26273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 25510 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-02-15 02:13:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-15 02:13:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-02-15 02:13:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.0133779264214047) internal successors, (303), 299 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 307 transitions. [2022-02-15 02:13:01,671 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 307 transitions. Word has length 298 [2022-02-15 02:13:01,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:01,672 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 307 transitions. [2022-02-15 02:13:01,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 1.6424581005586592) internal successors, (294), 178 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 307 transitions. [2022-02-15 02:13:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-02-15 02:13:01,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:01,673 INFO L514 BasicCegarLoop]: trace histogram [114, 113, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:01,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 02:13:01,674 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:01,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash 258665012, now seen corresponding path program 63 times [2022-02-15 02:13:01,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:01,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698539563] [2022-02-15 02:13:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:01,737 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:01,763 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 02:13:01,764 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:01,790 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 02:13:01,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:01,831 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:01,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:03,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:03,253 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 02:13:08,861 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:08,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698539563] [2022-02-15 02:13:08,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1698539563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:08,862 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:08,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [182] imperfect sequences [] total 182 [2022-02-15 02:13:08,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595500140] [2022-02-15 02:13:08,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:08,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-02-15 02:13:08,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-02-15 02:13:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9851, Invalid=23091, Unknown=0, NotChecked=0, Total=32942 [2022-02-15 02:13:08,865 INFO L87 Difference]: Start difference. First operand 304 states and 307 transitions. Second operand has 182 states, 182 states have (on average 1.6428571428571428) internal successors, (299), 181 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:27,954 INFO L93 Difference]: Finished difference Result 605 states and 616 transitions. [2022-02-15 02:13:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-02-15 02:13:27,954 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 1.6428571428571428) internal successors, (299), 181 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-02-15 02:13:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:27,955 INFO L225 Difference]: With dead ends: 605 [2022-02-15 02:13:27,955 INFO L226 Difference]: Without dead ends: 309 [2022-02-15 02:13:27,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37969 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=29547, Invalid=100413, Unknown=0, NotChecked=0, Total=129960 [2022-02-15 02:13:27,961 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 592 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 26529 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 27301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 26529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:27,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 69 Invalid, 27301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 26529 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-02-15 02:13:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-15 02:13:27,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2022-02-15 02:13:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.013157894736842) internal successors, (308), 304 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 312 transitions. [2022-02-15 02:13:27,972 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 312 transitions. Word has length 303 [2022-02-15 02:13:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:27,972 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 312 transitions. [2022-02-15 02:13:27,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 1.6428571428571428) internal successors, (299), 181 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 312 transitions. [2022-02-15 02:13:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-02-15 02:13:27,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:27,973 INFO L514 BasicCegarLoop]: trace histogram [116, 115, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:27,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 02:13:27,973 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:27,974 INFO L85 PathProgramCache]: Analyzing trace with hash 874248569, now seen corresponding path program 64 times [2022-02-15 02:13:27,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:27,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627811346] [2022-02-15 02:13:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:28,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:28,051 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 02:13:28,051 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:28,084 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 02:13:28,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:28,155 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:28,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:29,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:29,595 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 02:13:35,267 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:35,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627811346] [2022-02-15 02:13:35,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [627811346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:35,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:35,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [185] imperfect sequences [] total 185 [2022-02-15 02:13:35,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729479166] [2022-02-15 02:13:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:35,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2022-02-15 02:13:35,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2022-02-15 02:13:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10168, Invalid=23872, Unknown=0, NotChecked=0, Total=34040 [2022-02-15 02:13:35,270 INFO L87 Difference]: Start difference. First operand 309 states and 312 transitions. Second operand has 185 states, 185 states have (on average 1.6432432432432433) internal successors, (304), 184 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:54,932 INFO L93 Difference]: Finished difference Result 615 states and 626 transitions. [2022-02-15 02:13:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-15 02:13:54,933 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 1.6432432432432433) internal successors, (304), 184 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 308 [2022-02-15 02:13:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:54,934 INFO L225 Difference]: With dead ends: 615 [2022-02-15 02:13:54,934 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 02:13:54,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39307 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=30498, Invalid=103824, Unknown=0, NotChecked=0, Total=134322 [2022-02-15 02:13:54,939 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1077 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27441 mSolverCounterSat, 1148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1148 IncrementalHoareTripleChecker+Valid, 27441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:54,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 29 Invalid, 28589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1148 Valid, 27441 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-02-15 02:13:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 02:13:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2022-02-15 02:13:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.0129449838187703) internal successors, (313), 309 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 317 transitions. [2022-02-15 02:13:54,949 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 317 transitions. Word has length 308 [2022-02-15 02:13:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:54,949 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 317 transitions. [2022-02-15 02:13:54,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 1.6432432432432433) internal successors, (304), 184 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 317 transitions. [2022-02-15 02:13:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-02-15 02:13:54,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:54,951 INFO L514 BasicCegarLoop]: trace histogram [118, 117, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:54,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 02:13:54,951 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash 72920448, now seen corresponding path program 65 times [2022-02-15 02:13:54,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:54,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013495066] [2022-02-15 02:13:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:55,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:55,020 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 02:13:55,020 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:55,037 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 02:13:55,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:55,088 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:55,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:56,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:56,507 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 02:14:02,299 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:02,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013495066] [2022-02-15 02:14:02,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013495066] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:02,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:02,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [188] imperfect sequences [] total 188 [2022-02-15 02:14:02,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035908213] [2022-02-15 02:14:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:02,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-02-15 02:14:02,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-02-15 02:14:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10490, Invalid=24666, Unknown=0, NotChecked=0, Total=35156 [2022-02-15 02:14:02,302 INFO L87 Difference]: Start difference. First operand 314 states and 317 transitions. Second operand has 188 states, 188 states have (on average 1.6436170212765957) internal successors, (309), 187 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:14:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:22,591 INFO L93 Difference]: Finished difference Result 625 states and 636 transitions. [2022-02-15 02:14:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-02-15 02:14:22,591 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.6436170212765957) internal successors, (309), 187 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-02-15 02:14:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:22,592 INFO L225 Difference]: With dead ends: 625 [2022-02-15 02:14:22,592 INFO L226 Difference]: Without dead ends: 319 [2022-02-15 02:14:22,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40538 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=31464, Invalid=107292, Unknown=0, NotChecked=0, Total=138756 [2022-02-15 02:14:22,599 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 853 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 28415 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 29460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 28415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:22,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 49 Invalid, 29460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 28415 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-02-15 02:14:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-02-15 02:14:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-02-15 02:14:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.0127388535031847) internal successors, (318), 314 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:14:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 322 transitions. [2022-02-15 02:14:22,610 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 322 transitions. Word has length 313 [2022-02-15 02:14:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:22,610 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 322 transitions. [2022-02-15 02:14:22,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.6436170212765957) internal successors, (309), 187 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:14:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 322 transitions. [2022-02-15 02:14:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-02-15 02:14:22,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:22,612 INFO L514 BasicCegarLoop]: trace histogram [120, 119, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:14:22,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 02:14:22,612 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:22,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1983878355, now seen corresponding path program 66 times [2022-02-15 02:14:22,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:22,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12945377] [2022-02-15 02:14:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:22,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:22,742 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 02:14:22,742 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:22,768 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 02:14:22,818 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:22,818 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:22,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:24,398 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 02:14:30,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:30,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12945377] [2022-02-15 02:14:30,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [12945377] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:30,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:30,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [191] imperfect sequences [] total 191 [2022-02-15 02:14:30,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373385124] [2022-02-15 02:14:30,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:30,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-02-15 02:14:30,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-02-15 02:14:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11085, Invalid=26357, Unknown=0, NotChecked=0, Total=37442 [2022-02-15 02:14:30,356 INFO L87 Difference]: Start difference. First operand 319 states and 322 transitions. Second operand has 191 states, 191 states have (on average 1.643979057591623) internal successors, (314), 190 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:14:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:51,290 INFO L93 Difference]: Finished difference Result 871 states and 882 transitions. [2022-02-15 02:14:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-02-15 02:14:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.643979057591623) internal successors, (314), 190 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2022-02-15 02:14:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:51,292 INFO L225 Difference]: With dead ends: 871 [2022-02-15 02:14:51,292 INFO L226 Difference]: Without dead ends: 560 [2022-02-15 02:14:51,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43023 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=32718, Invalid=112824, Unknown=0, NotChecked=0, Total=145542 [2022-02-15 02:14:51,299 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 620 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 29818 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 29818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:51,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 29 Invalid, 30505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 29818 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-02-15 02:14:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-02-15 02:14:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-02-15 02:14:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 555 states have (on average 1.009009009009009) internal successors, (560), 555 states have internal predecessors, (560), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:14:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 564 transitions. [2022-02-15 02:14:51,327 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 564 transitions. Word has length 318 [2022-02-15 02:14:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:51,327 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 564 transitions. [2022-02-15 02:14:51,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.643979057591623) internal successors, (314), 190 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:14:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 564 transitions. [2022-02-15 02:14:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-02-15 02:14:51,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:51,329 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:14:51,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 02:14:51,329 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:51,329 INFO L85 PathProgramCache]: Analyzing trace with hash -360050767, now seen corresponding path program 67 times [2022-02-15 02:14:51,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:51,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595288440] [2022-02-15 02:14:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:51,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:51,406 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 02:14:51,406 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:51,430 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 02:14:51,480 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:51,480 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:14:51,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:52,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.