/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:58:01,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:58:01,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:58:02,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:58:02,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:58:02,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:58:02,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:58:02,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:58:02,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:58:02,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:58:02,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:58:02,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:58:02,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:58:02,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:58:02,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:58:02,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:58:02,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:58:02,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:58:02,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:58:02,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:58:02,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:58:02,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:58:02,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:58:02,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:58:02,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 05:58:02,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:58:02,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:58:02,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:58:02,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 05:58:02,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:58:02,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:58:02,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:58:02,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:58:02,112 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:58:02,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:58:02,112 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:58:02,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:58:02,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:58:02,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:58:02,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:58:02,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:58:02,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:58:02,113 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:58:02,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:58:02,114 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:58:02,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:58:02,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:58:02,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:58:02,114 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:58:02,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:58:02,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:58:02,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:58:02,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:58:02,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:58:02,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:58:02,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:58:02,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:58:02,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:58:02,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 05:58:02,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:58:02,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:58:02,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:58:02,458 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:58:02,458 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:58:02,459 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-19 05:58:02,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/416140e83/02efda788f454f93b2f2194fd0fc2ced/FLAG8216a8103 [2020-08-19 05:58:02,958 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:58:02,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-19 05:58:02,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/416140e83/02efda788f454f93b2f2194fd0fc2ced/FLAG8216a8103 [2020-08-19 05:58:03,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/416140e83/02efda788f454f93b2f2194fd0fc2ced [2020-08-19 05:58:03,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:58:03,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:58:03,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:58:03,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:58:03,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:58:03,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:58:03" (1/1) ... [2020-08-19 05:58:03,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f72e2c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03, skipping insertion in model container [2020-08-19 05:58:03,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:58:03" (1/1) ... [2020-08-19 05:58:03,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:58:03,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:58:03,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:58:03,665 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:58:03,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:58:03,705 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:58:03,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03 WrapperNode [2020-08-19 05:58:03,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:58:03,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:58:03,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:58:03,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:58:03,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03" (1/1) ... [2020-08-19 05:58:03,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03" (1/1) ... [2020-08-19 05:58:03,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03" (1/1) ... [2020-08-19 05:58:03,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03" (1/1) ... [2020-08-19 05:58:03,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03" (1/1) ... [2020-08-19 05:58:03,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03" (1/1) ... [2020-08-19 05:58:03,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03" (1/1) ... [2020-08-19 05:58:03,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:58:03,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:58:03,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:58:03,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:58:03,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:58:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:58:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:58:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-08-19 05:58:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:58:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:58:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:58:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-08-19 05:58:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:58:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:58:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:58:04,068 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:58:04,068 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 05:58:04,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:58:04 BoogieIcfgContainer [2020-08-19 05:58:04,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:58:04,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:58:04,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:58:04,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:58:04,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:58:03" (1/3) ... [2020-08-19 05:58:04,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360fcb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:58:04, skipping insertion in model container [2020-08-19 05:58:04,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:58:03" (2/3) ... [2020-08-19 05:58:04,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360fcb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:58:04, skipping insertion in model container [2020-08-19 05:58:04,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:58:04" (3/3) ... [2020-08-19 05:58:04,079 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-08-19 05:58:04,089 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:58:04,097 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:58:04,110 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:58:04,132 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:58:04,133 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:58:04,133 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:58:04,133 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:58:04,133 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:58:04,133 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:58:04,133 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:58:04,134 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:58:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-19 05:58:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 05:58:04,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:04,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:04,157 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:04,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:04,162 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-08-19 05:58:04,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:04,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965525351] [2020-08-19 05:58:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:04,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:04,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:58:04,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965525351] [2020-08-19 05:58:04,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:58:04,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 05:58:04,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533783041] [2020-08-19 05:58:04,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:58:04,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:58:04,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:58:04,457 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-19 05:58:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:04,620 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-19 05:58:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:58:04,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-19 05:58:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:04,633 INFO L225 Difference]: With dead ends: 33 [2020-08-19 05:58:04,634 INFO L226 Difference]: Without dead ends: 19 [2020-08-19 05:58:04,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:58:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-19 05:58:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-19 05:58:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-19 05:58:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-19 05:58:04,679 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-08-19 05:58:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:04,680 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-19 05:58:04,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:58:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-19 05:58:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:58:04,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:04,682 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:04,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:58:04,683 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:04,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-08-19 05:58:04,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:04,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638917583] [2020-08-19 05:58:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:04,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:04,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:04,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 05:58:04,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638917583] [2020-08-19 05:58:04,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:04,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 05:58:04,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984152176] [2020-08-19 05:58:04,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:58:04,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:04,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:58:04,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:58:04,842 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-08-19 05:58:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:04,966 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-08-19 05:58:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:58:04,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-19 05:58:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:04,968 INFO L225 Difference]: With dead ends: 26 [2020-08-19 05:58:04,969 INFO L226 Difference]: Without dead ends: 22 [2020-08-19 05:58:04,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-19 05:58:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-19 05:58:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-19 05:58:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-19 05:58:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-19 05:58:04,977 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-08-19 05:58:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:04,977 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-19 05:58:04,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:58:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-19 05:58:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:58:04,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:04,979 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:04,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:58:04,980 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:04,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:04,980 INFO L82 PathProgramCache]: Analyzing trace with hash 293522751, now seen corresponding path program 2 times [2020-08-19 05:58:04,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:04,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773847972] [2020-08-19 05:58:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 05:58:05,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773847972] [2020-08-19 05:58:05,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:05,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 05:58:05,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918705800] [2020-08-19 05:58:05,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 05:58:05,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:05,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 05:58:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:58:05,230 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-08-19 05:58:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:05,399 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-08-19 05:58:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 05:58:05,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-19 05:58:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:05,401 INFO L225 Difference]: With dead ends: 29 [2020-08-19 05:58:05,401 INFO L226 Difference]: Without dead ends: 25 [2020-08-19 05:58:05,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-19 05:58:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-19 05:58:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-19 05:58:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-19 05:58:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-19 05:58:05,409 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2020-08-19 05:58:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:05,409 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-19 05:58:05,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 05:58:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-19 05:58:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 05:58:05,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:05,411 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:05,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:58:05,412 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:05,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:05,412 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 3 times [2020-08-19 05:58:05,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:05,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244940254] [2020-08-19 05:58:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 05:58:05,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244940254] [2020-08-19 05:58:05,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:05,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 05:58:05,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676108624] [2020-08-19 05:58:05,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 05:58:05,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 05:58:05,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:58:05,650 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2020-08-19 05:58:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:05,859 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-08-19 05:58:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 05:58:05,859 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-19 05:58:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:05,861 INFO L225 Difference]: With dead ends: 32 [2020-08-19 05:58:05,861 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 05:58:05,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-08-19 05:58:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 05:58:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-19 05:58:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 05:58:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-19 05:58:05,869 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2020-08-19 05:58:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:05,870 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-19 05:58:05,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 05:58:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-19 05:58:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 05:58:05,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:05,872 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:05,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:58:05,873 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:05,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 4 times [2020-08-19 05:58:05,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:05,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675426972] [2020-08-19 05:58:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:05,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 05:58:06,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675426972] [2020-08-19 05:58:06,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:06,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 05:58:06,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22459617] [2020-08-19 05:58:06,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 05:58:06,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 05:58:06,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-19 05:58:06,144 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-08-19 05:58:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:06,437 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-08-19 05:58:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 05:58:06,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-19 05:58:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:06,439 INFO L225 Difference]: With dead ends: 35 [2020-08-19 05:58:06,439 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 05:58:06,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-08-19 05:58:06,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 05:58:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-19 05:58:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-19 05:58:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-19 05:58:06,447 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38 [2020-08-19 05:58:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:06,447 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-19 05:58:06,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 05:58:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-19 05:58:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 05:58:06,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:06,450 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:06,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:58:06,450 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:06,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 5 times [2020-08-19 05:58:06,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:06,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31685000] [2020-08-19 05:58:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 05:58:06,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31685000] [2020-08-19 05:58:06,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:06,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 05:58:06,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33617552] [2020-08-19 05:58:06,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 05:58:06,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 05:58:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-19 05:58:06,733 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2020-08-19 05:58:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:07,091 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-08-19 05:58:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 05:58:07,091 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-08-19 05:58:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:07,094 INFO L225 Difference]: With dead ends: 38 [2020-08-19 05:58:07,094 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 05:58:07,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2020-08-19 05:58:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 05:58:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-19 05:58:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 05:58:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-08-19 05:58:07,106 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44 [2020-08-19 05:58:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:07,108 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-08-19 05:58:07,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 05:58:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-08-19 05:58:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 05:58:07,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:07,112 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:07,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:58:07,116 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:07,116 INFO L82 PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 6 times [2020-08-19 05:58:07,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:07,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33088888] [2020-08-19 05:58:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:07,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:07,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:07,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:07,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:07,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:07,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:07,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:07,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 05:58:07,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33088888] [2020-08-19 05:58:07,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:07,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 05:58:07,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488021316] [2020-08-19 05:58:07,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 05:58:07,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:07,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 05:58:07,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-08-19 05:58:07,491 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-08-19 05:58:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:08,007 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-08-19 05:58:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 05:58:08,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-19 05:58:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:08,009 INFO L225 Difference]: With dead ends: 41 [2020-08-19 05:58:08,009 INFO L226 Difference]: Without dead ends: 37 [2020-08-19 05:58:08,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-08-19 05:58:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-19 05:58:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-19 05:58:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 05:58:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-19 05:58:08,023 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2020-08-19 05:58:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:08,024 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-19 05:58:08,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 05:58:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-19 05:58:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 05:58:08,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:08,027 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:08,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:58:08,028 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:08,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:08,028 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 7 times [2020-08-19 05:58:08,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:08,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376572538] [2020-08-19 05:58:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 05:58:08,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376572538] [2020-08-19 05:58:08,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:08,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 05:58:08,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365914545] [2020-08-19 05:58:08,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 05:58:08,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:08,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 05:58:08,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-19 05:58:08,471 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 20 states. [2020-08-19 05:58:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:08,997 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-08-19 05:58:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 05:58:08,997 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-08-19 05:58:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:08,999 INFO L225 Difference]: With dead ends: 44 [2020-08-19 05:58:08,999 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 05:58:09,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 05:58:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 05:58:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-19 05:58:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-19 05:58:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-08-19 05:58:09,008 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 56 [2020-08-19 05:58:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:09,008 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-08-19 05:58:09,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 05:58:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-08-19 05:58:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 05:58:09,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:09,010 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:09,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:58:09,010 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:09,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711615, now seen corresponding path program 8 times [2020-08-19 05:58:09,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:09,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741814175] [2020-08-19 05:58:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 05:58:09,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741814175] [2020-08-19 05:58:09,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:09,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 05:58:09,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576611900] [2020-08-19 05:58:09,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 05:58:09,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:09,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 05:58:09,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-08-19 05:58:09,473 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 22 states. [2020-08-19 05:58:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:10,148 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-08-19 05:58:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 05:58:10,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2020-08-19 05:58:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:10,150 INFO L225 Difference]: With dead ends: 47 [2020-08-19 05:58:10,150 INFO L226 Difference]: Without dead ends: 43 [2020-08-19 05:58:10,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 05:58:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-19 05:58:10,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-19 05:58:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 05:58:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-19 05:58:10,166 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 62 [2020-08-19 05:58:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:10,166 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-19 05:58:10,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 05:58:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-19 05:58:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 05:58:10,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:10,168 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:10,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:58:10,171 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:10,171 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 9 times [2020-08-19 05:58:10,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:10,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718205978] [2020-08-19 05:58:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 05:58:10,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718205978] [2020-08-19 05:58:10,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:10,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 05:58:10,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504196008] [2020-08-19 05:58:10,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 05:58:10,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 05:58:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-08-19 05:58:10,785 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 24 states. [2020-08-19 05:58:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:11,572 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-08-19 05:58:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 05:58:11,572 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2020-08-19 05:58:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:11,574 INFO L225 Difference]: With dead ends: 50 [2020-08-19 05:58:11,574 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 05:58:11,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 05:58:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 05:58:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-19 05:58:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 05:58:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-08-19 05:58:11,582 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 68 [2020-08-19 05:58:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:11,582 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-08-19 05:58:11,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 05:58:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-08-19 05:58:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-19 05:58:11,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:11,584 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:11,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:58:11,585 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash 418322239, now seen corresponding path program 10 times [2020-08-19 05:58:11,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:11,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725548069] [2020-08-19 05:58:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:11,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:12,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:12,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-19 05:58:12,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725548069] [2020-08-19 05:58:12,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:12,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 05:58:12,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243234303] [2020-08-19 05:58:12,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 05:58:12,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:12,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 05:58:12,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-08-19 05:58:12,193 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 26 states. [2020-08-19 05:58:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:13,186 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-08-19 05:58:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 05:58:13,187 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-08-19 05:58:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:13,189 INFO L225 Difference]: With dead ends: 53 [2020-08-19 05:58:13,189 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 05:58:13,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2020-08-19 05:58:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 05:58:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-19 05:58:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-19 05:58:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-19 05:58:13,205 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 74 [2020-08-19 05:58:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:13,205 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-19 05:58:13,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 05:58:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-19 05:58:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-19 05:58:13,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:13,207 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:13,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:58:13,208 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:13,210 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 11 times [2020-08-19 05:58:13,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:13,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614288972] [2020-08-19 05:58:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:13,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-19 05:58:14,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614288972] [2020-08-19 05:58:14,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:14,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 05:58:14,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837196459] [2020-08-19 05:58:14,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 05:58:14,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:14,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 05:58:14,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-08-19 05:58:14,061 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 28 states. [2020-08-19 05:58:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:15,152 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-08-19 05:58:15,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 05:58:15,153 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-08-19 05:58:15,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:15,154 INFO L225 Difference]: With dead ends: 56 [2020-08-19 05:58:15,154 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 05:58:15,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2405, Unknown=0, NotChecked=0, Total=2550 [2020-08-19 05:58:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 05:58:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-19 05:58:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 05:58:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-08-19 05:58:15,163 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 80 [2020-08-19 05:58:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:15,163 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-08-19 05:58:15,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 05:58:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-08-19 05:58:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 05:58:15,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:15,165 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:15,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 05:58:15,165 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash -195309121, now seen corresponding path program 12 times [2020-08-19 05:58:15,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:15,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516559859] [2020-08-19 05:58:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:15,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-19 05:58:16,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516559859] [2020-08-19 05:58:16,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:16,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 05:58:16,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462295716] [2020-08-19 05:58:16,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 05:58:16,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:16,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 05:58:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-08-19 05:58:16,087 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 30 states. [2020-08-19 05:58:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:17,339 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-08-19 05:58:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-19 05:58:17,339 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-19 05:58:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:17,341 INFO L225 Difference]: With dead ends: 59 [2020-08-19 05:58:17,341 INFO L226 Difference]: Without dead ends: 55 [2020-08-19 05:58:17,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2020-08-19 05:58:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-19 05:58:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-19 05:58:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 05:58:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-19 05:58:17,349 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 86 [2020-08-19 05:58:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:17,349 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-19 05:58:17,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 05:58:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-19 05:58:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-19 05:58:17,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:17,351 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:17,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 05:58:17,351 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:17,352 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 13 times [2020-08-19 05:58:17,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:17,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166759662] [2020-08-19 05:58:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:17,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:18,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:18,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:18,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-19 05:58:18,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166759662] [2020-08-19 05:58:18,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:18,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-19 05:58:18,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678650053] [2020-08-19 05:58:18,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-19 05:58:18,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-19 05:58:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-08-19 05:58:18,353 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 32 states. [2020-08-19 05:58:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:19,745 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-08-19 05:58:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 05:58:19,745 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-08-19 05:58:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:19,748 INFO L225 Difference]: With dead ends: 62 [2020-08-19 05:58:19,748 INFO L226 Difference]: Without dead ends: 58 [2020-08-19 05:58:19,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2020-08-19 05:58:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-19 05:58:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-19 05:58:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 05:58:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-08-19 05:58:19,769 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 92 [2020-08-19 05:58:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:19,770 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-08-19 05:58:19,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-19 05:58:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-08-19 05:58:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 05:58:19,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:19,772 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:19,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 05:58:19,772 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1462920129, now seen corresponding path program 14 times [2020-08-19 05:58:19,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:19,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816756826] [2020-08-19 05:58:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:19,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:19,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:19,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:19,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:19,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-19 05:58:20,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816756826] [2020-08-19 05:58:20,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:20,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-19 05:58:20,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793802771] [2020-08-19 05:58:20,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-19 05:58:20,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-19 05:58:20,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 05:58:20,839 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 34 states. [2020-08-19 05:58:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:22,444 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-08-19 05:58:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-19 05:58:22,444 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2020-08-19 05:58:22,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:22,446 INFO L225 Difference]: With dead ends: 65 [2020-08-19 05:58:22,446 INFO L226 Difference]: Without dead ends: 61 [2020-08-19 05:58:22,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=181, Invalid=3725, Unknown=0, NotChecked=0, Total=3906 [2020-08-19 05:58:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-19 05:58:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-08-19 05:58:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 05:58:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-08-19 05:58:22,454 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 98 [2020-08-19 05:58:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:22,455 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-08-19 05:58:22,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-19 05:58:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-08-19 05:58:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-19 05:58:22,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:22,456 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:22,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 05:58:22,457 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:22,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 15 times [2020-08-19 05:58:22,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:22,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120202131] [2020-08-19 05:58:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:22,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:23,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:23,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:23,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:23,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:23,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:23,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:23,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-19 05:58:23,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120202131] [2020-08-19 05:58:23,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:23,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-19 05:58:23,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032571299] [2020-08-19 05:58:23,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-19 05:58:23,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:23,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-19 05:58:23,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-08-19 05:58:23,701 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 36 states. [2020-08-19 05:58:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:25,524 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-08-19 05:58:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-19 05:58:25,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 104 [2020-08-19 05:58:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:25,527 INFO L225 Difference]: With dead ends: 68 [2020-08-19 05:58:25,527 INFO L226 Difference]: Without dead ends: 64 [2020-08-19 05:58:25,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=193, Invalid=4229, Unknown=0, NotChecked=0, Total=4422 [2020-08-19 05:58:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-19 05:58:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-08-19 05:58:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-19 05:58:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-08-19 05:58:25,535 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 104 [2020-08-19 05:58:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:25,536 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-08-19 05:58:25,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-19 05:58:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-08-19 05:58:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 05:58:25,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:25,538 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:25,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 05:58:25,538 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:25,538 INFO L82 PathProgramCache]: Analyzing trace with hash -514820417, now seen corresponding path program 16 times [2020-08-19 05:58:25,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:25,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256375499] [2020-08-19 05:58:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:25,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:25,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:25,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:25,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:25,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:25,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:25,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:25,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:25,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-19 05:58:26,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256375499] [2020-08-19 05:58:26,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:26,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-19 05:58:26,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053337953] [2020-08-19 05:58:26,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-19 05:58:26,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:26,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-19 05:58:26,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 05:58:26,848 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 38 states. [2020-08-19 05:58:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:28,895 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-08-19 05:58:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-19 05:58:28,895 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2020-08-19 05:58:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:28,897 INFO L225 Difference]: With dead ends: 71 [2020-08-19 05:58:28,898 INFO L226 Difference]: Without dead ends: 67 [2020-08-19 05:58:28,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=205, Invalid=4765, Unknown=0, NotChecked=0, Total=4970 [2020-08-19 05:58:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-19 05:58:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-08-19 05:58:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 05:58:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-08-19 05:58:28,909 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 110 [2020-08-19 05:58:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:28,909 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-08-19 05:58:28,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-19 05:58:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-08-19 05:58:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-19 05:58:28,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:28,912 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:28,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 05:58:28,912 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 17 times [2020-08-19 05:58:28,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:28,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647512778] [2020-08-19 05:58:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:28,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:28,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:29,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:30,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:30,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:30,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-19 05:58:30,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647512778] [2020-08-19 05:58:30,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:30,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-19 05:58:30,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193850822] [2020-08-19 05:58:30,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-19 05:58:30,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:30,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-19 05:58:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-08-19 05:58:30,423 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 40 states. [2020-08-19 05:58:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:32,707 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-08-19 05:58:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-19 05:58:32,708 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2020-08-19 05:58:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:32,709 INFO L225 Difference]: With dead ends: 74 [2020-08-19 05:58:32,709 INFO L226 Difference]: Without dead ends: 70 [2020-08-19 05:58:32,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=217, Invalid=5333, Unknown=0, NotChecked=0, Total=5550 [2020-08-19 05:58:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-19 05:58:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-19 05:58:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 05:58:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-08-19 05:58:32,717 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 116 [2020-08-19 05:58:32,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:32,718 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-08-19 05:58:32,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-19 05:58:32,718 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-08-19 05:58:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-19 05:58:32,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:32,719 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:32,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 05:58:32,719 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash -336568001, now seen corresponding path program 18 times [2020-08-19 05:58:32,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:32,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162108268] [2020-08-19 05:58:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:32,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:32,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:32,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:32,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:32,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:32,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:33,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:34,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:34,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-19 05:58:34,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162108268] [2020-08-19 05:58:34,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:34,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-19 05:58:34,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863548174] [2020-08-19 05:58:34,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-19 05:58:34,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:34,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-19 05:58:34,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 05:58:34,388 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 42 states. [2020-08-19 05:58:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:36,957 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-08-19 05:58:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-19 05:58:36,958 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-08-19 05:58:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:36,959 INFO L225 Difference]: With dead ends: 77 [2020-08-19 05:58:36,959 INFO L226 Difference]: Without dead ends: 73 [2020-08-19 05:58:36,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=229, Invalid=5933, Unknown=0, NotChecked=0, Total=6162 [2020-08-19 05:58:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-19 05:58:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-08-19 05:58:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 05:58:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-08-19 05:58:36,967 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 122 [2020-08-19 05:58:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:36,967 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-08-19 05:58:36,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-19 05:58:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-08-19 05:58:36,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-19 05:58:36,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:36,968 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:36,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 05:58:36,969 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 19 times [2020-08-19 05:58:36,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:36,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505365757] [2020-08-19 05:58:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:37,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:38,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:38,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:38,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:38,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:38,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:38,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:38,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-19 05:58:38,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505365757] [2020-08-19 05:58:38,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:38,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-19 05:58:38,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656834922] [2020-08-19 05:58:38,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-19 05:58:38,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:38,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-19 05:58:38,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-08-19 05:58:38,861 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 44 states. [2020-08-19 05:58:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:41,727 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-08-19 05:58:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-19 05:58:41,728 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2020-08-19 05:58:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:41,730 INFO L225 Difference]: With dead ends: 80 [2020-08-19 05:58:41,730 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 05:58:41,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=241, Invalid=6565, Unknown=0, NotChecked=0, Total=6806 [2020-08-19 05:58:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 05:58:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-08-19 05:58:41,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 05:58:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-08-19 05:58:41,738 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 128 [2020-08-19 05:58:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:41,738 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-08-19 05:58:41,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-19 05:58:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-08-19 05:58:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-19 05:58:41,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:41,740 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:41,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 05:58:41,740 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2042190783, now seen corresponding path program 20 times [2020-08-19 05:58:41,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:41,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654283849] [2020-08-19 05:58:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:41,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:41,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:41,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:41,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:42,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:43,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:43,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:43,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:43,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:43,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:43,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:43,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-19 05:58:43,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654283849] [2020-08-19 05:58:43,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:43,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-19 05:58:43,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117948517] [2020-08-19 05:58:43,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-19 05:58:43,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:43,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-19 05:58:43,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-08-19 05:58:43,905 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 46 states. [2020-08-19 05:58:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:47,144 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-08-19 05:58:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-19 05:58:47,145 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2020-08-19 05:58:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:47,147 INFO L225 Difference]: With dead ends: 83 [2020-08-19 05:58:47,147 INFO L226 Difference]: Without dead ends: 79 [2020-08-19 05:58:47,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=253, Invalid=7229, Unknown=0, NotChecked=0, Total=7482 [2020-08-19 05:58:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-19 05:58:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-19 05:58:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 05:58:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-08-19 05:58:47,154 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 134 [2020-08-19 05:58:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:47,155 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-08-19 05:58:47,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-19 05:58:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-08-19 05:58:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-19 05:58:47,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:47,157 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:47,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 05:58:47,157 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:47,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 21 times [2020-08-19 05:58:47,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:47,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634587474] [2020-08-19 05:58:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:47,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:48,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:48,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:48,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:48,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:48,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:48,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:48,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:48,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:49,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:49,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-19 05:58:49,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634587474] [2020-08-19 05:58:49,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:49,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-19 05:58:49,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295681017] [2020-08-19 05:58:49,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-19 05:58:49,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:49,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-19 05:58:49,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-08-19 05:58:49,463 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 48 states. [2020-08-19 05:58:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:53,135 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-08-19 05:58:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-19 05:58:53,140 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2020-08-19 05:58:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:53,141 INFO L225 Difference]: With dead ends: 86 [2020-08-19 05:58:53,141 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 05:58:53,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=265, Invalid=7925, Unknown=0, NotChecked=0, Total=8190 [2020-08-19 05:58:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 05:58:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-19 05:58:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-19 05:58:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-08-19 05:58:53,153 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 140 [2020-08-19 05:58:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:53,153 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-08-19 05:58:53,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-19 05:58:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-08-19 05:58:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 05:58:53,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:53,157 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:53,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 05:58:53,157 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1589077567, now seen corresponding path program 22 times [2020-08-19 05:58:53,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:53,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952912585] [2020-08-19 05:58:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:53,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:54,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:54,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:54,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:54,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:54,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:54,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:54,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:54,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:54,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:55,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:55,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:55,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-19 05:58:55,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952912585] [2020-08-19 05:58:55,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:58:55,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-19 05:58:55,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742088001] [2020-08-19 05:58:55,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-19 05:58:55,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:58:55,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-19 05:58:55,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-08-19 05:58:55,648 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 50 states. [2020-08-19 05:58:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:58:59,695 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-08-19 05:58:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-19 05:58:59,696 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2020-08-19 05:58:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:58:59,698 INFO L225 Difference]: With dead ends: 89 [2020-08-19 05:58:59,698 INFO L226 Difference]: Without dead ends: 85 [2020-08-19 05:58:59,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=277, Invalid=8653, Unknown=0, NotChecked=0, Total=8930 [2020-08-19 05:58:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-19 05:58:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-08-19 05:58:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-19 05:58:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-08-19 05:58:59,704 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 146 [2020-08-19 05:58:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:58:59,705 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-08-19 05:58:59,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-19 05:58:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-08-19 05:58:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-19 05:58:59,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:58:59,706 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:58:59,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 05:58:59,707 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:58:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:58:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1482336439, now seen corresponding path program 23 times [2020-08-19 05:58:59,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:58:59,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045981302] [2020-08-19 05:58:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:58:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:58:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:59,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:58:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:59,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:59,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:58:59,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:58:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:00,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:01,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:01,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:01,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:01,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:01,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:01,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:01,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:01,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:02,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:02,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-19 05:59:02,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045981302] [2020-08-19 05:59:02,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:02,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-19 05:59:02,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381256094] [2020-08-19 05:59:02,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-19 05:59:02,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-19 05:59:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2020-08-19 05:59:02,500 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 52 states.