/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 21:53:35,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:53:35,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:53:36,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 21:53:36,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 21:53:36,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 21:53:36,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 21:53:36,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 21:53:36,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 21:53:36,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 21:53:36,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 21:53:36,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 21:53:36,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:53:36,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:53:36,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:53:36,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:53:36,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:53:36,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:53:36,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:53:36,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:53:36,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:53:36,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:53:36,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:53:36,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:53:36,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 21:53:36,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:53:36,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:53:36,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:53:36,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 21:53:36,076 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:53:36,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:53:36,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:53:36,077 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:53:36,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:53:36,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:53:36,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:53:36,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:53:36,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:53:36,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:53:36,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:53:36,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:53:36,079 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:53:36,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:53:36,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:53:36,080 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:53:36,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:53:36,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:53:36,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:53:36,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:53:36,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:53:36,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:53:36,081 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 21:53:36,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:53:36,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:53:36,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:53:36,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:53:36,393 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:53:36,394 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-22 21:53:36,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020c92b7b/c0a5ba5a6235472eb2b4f4d9e87bb2d9/FLAG5c42a14f9 [2020-08-22 21:53:36,864 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:53:36,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-22 21:53:36,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020c92b7b/c0a5ba5a6235472eb2b4f4d9e87bb2d9/FLAG5c42a14f9 [2020-08-22 21:53:37,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020c92b7b/c0a5ba5a6235472eb2b4f4d9e87bb2d9 [2020-08-22 21:53:37,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:53:37,308 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:53:37,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:53:37,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:53:37,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:53:37,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:53:37" (1/1) ... [2020-08-22 21:53:37,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f08780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37, skipping insertion in model container [2020-08-22 21:53:37,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:53:37" (1/1) ... [2020-08-22 21:53:37,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:53:37,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:53:37,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:53:37,530 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:53:37,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:53:37,557 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:53:37,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37 WrapperNode [2020-08-22 21:53:37,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:53:37,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:53:37,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:53:37,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:53:37,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37" (1/1) ... [2020-08-22 21:53:37,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37" (1/1) ... [2020-08-22 21:53:37,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37" (1/1) ... [2020-08-22 21:53:37,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37" (1/1) ... [2020-08-22 21:53:37,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37" (1/1) ... [2020-08-22 21:53:37,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37" (1/1) ... [2020-08-22 21:53:37,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37" (1/1) ... [2020-08-22 21:53:37,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:53:37,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:53:37,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:53:37,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:53:37,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 21:53:37,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:53:37,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:53:37,713 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-08-22 21:53:37,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:53:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:53:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 21:53:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-08-22 21:53:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:53:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:53:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:53:37,950 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:53:37,950 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 21:53:37,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:53:37 BoogieIcfgContainer [2020-08-22 21:53:37,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:53:37,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:53:37,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:53:37,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:53:37,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:53:37" (1/3) ... [2020-08-22 21:53:37,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ac065c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:53:37, skipping insertion in model container [2020-08-22 21:53:37,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:37" (2/3) ... [2020-08-22 21:53:37,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ac065c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:53:37, skipping insertion in model container [2020-08-22 21:53:37,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:53:37" (3/3) ... [2020-08-22 21:53:37,979 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-08-22 21:53:37,997 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:53:38,003 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:53:38,016 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:53:38,037 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:53:38,037 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:53:38,037 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:53:38,037 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:53:38,037 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:53:38,038 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:53:38,038 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:53:38,038 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:53:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-08-22 21:53:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 21:53:38,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:38,066 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:38,066 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:38,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2060884630, now seen corresponding path program 1 times [2020-08-22 21:53:38,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:38,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079161359] [2020-08-22 21:53:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 21:53:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 21:53:38,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079161359] [2020-08-22 21:53:38,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:38,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 21:53:38,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179838651] [2020-08-22 21:53:38,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 21:53:38,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:38,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 21:53:38,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:53:38,395 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-08-22 21:53:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:38,541 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-08-22 21:53:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 21:53:38,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-08-22 21:53:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:38,553 INFO L225 Difference]: With dead ends: 64 [2020-08-22 21:53:38,554 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 21:53:38,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:53:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 21:53:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-22 21:53:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 21:53:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-22 21:53:38,602 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 36 [2020-08-22 21:53:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:38,603 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-22 21:53:38,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 21:53:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-22 21:53:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 21:53:38,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:38,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:38,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:53:38,607 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:38,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:38,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1309951713, now seen corresponding path program 1 times [2020-08-22 21:53:38,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:38,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118984378] [2020-08-22 21:53:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:53:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 21:53:38,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118984378] [2020-08-22 21:53:38,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:53:38,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 21:53:38,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817494198] [2020-08-22 21:53:38,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 21:53:38,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:38,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 21:53:38,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:53:38,728 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2020-08-22 21:53:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:38,802 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-08-22 21:53:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 21:53:38,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-08-22 21:53:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:38,805 INFO L225 Difference]: With dead ends: 46 [2020-08-22 21:53:38,805 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 21:53:38,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:53:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 21:53:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-22 21:53:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 21:53:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-22 21:53:38,817 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 46 [2020-08-22 21:53:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:38,818 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-22 21:53:38,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 21:53:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-22 21:53:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 21:53:38,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:38,821 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:38,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:53:38,821 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash 942191350, now seen corresponding path program 2 times [2020-08-22 21:53:38,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:38,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030135306] [2020-08-22 21:53:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:38,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:39,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:39,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:53:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:39,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 21:53:39,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030135306] [2020-08-22 21:53:39,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:39,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 21:53:39,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869667960] [2020-08-22 21:53:39,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 21:53:39,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:39,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 21:53:39,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:53:39,317 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 18 states. [2020-08-22 21:53:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:39,857 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-08-22 21:53:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 21:53:39,857 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-08-22 21:53:39,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:39,860 INFO L225 Difference]: With dead ends: 68 [2020-08-22 21:53:39,860 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 21:53:39,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:53:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 21:53:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-08-22 21:53:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 21:53:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-08-22 21:53:39,880 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 56 [2020-08-22 21:53:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:39,881 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-08-22 21:53:39,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 21:53:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-08-22 21:53:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 21:53:39,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:39,888 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:39,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 21:53:39,889 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:39,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash -156864787, now seen corresponding path program 1 times [2020-08-22 21:53:39,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:39,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076006500] [2020-08-22 21:53:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:39,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:39,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:39,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:39,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:53:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 21:53:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-08-22 21:53:40,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076006500] [2020-08-22 21:53:40,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:40,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 21:53:40,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904511366] [2020-08-22 21:53:40,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 21:53:40,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 21:53:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:53:40,047 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 7 states. [2020-08-22 21:53:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:40,153 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2020-08-22 21:53:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 21:53:40,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-08-22 21:53:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:40,155 INFO L225 Difference]: With dead ends: 85 [2020-08-22 21:53:40,155 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 21:53:40,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:53:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 21:53:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 21:53:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 21:53:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-08-22 21:53:40,168 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 65 [2020-08-22 21:53:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:40,168 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-08-22 21:53:40,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 21:53:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-08-22 21:53:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 21:53:40,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:40,170 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:40,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 21:53:40,171 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash 387973505, now seen corresponding path program 3 times [2020-08-22 21:53:40,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:40,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355380153] [2020-08-22 21:53:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:53:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 21:53:40,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355380153] [2020-08-22 21:53:40,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:40,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 21:53:40,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009356453] [2020-08-22 21:53:40,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 21:53:40,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:40,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 21:53:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-08-22 21:53:40,650 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 22 states. [2020-08-22 21:53:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:41,250 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-08-22 21:53:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 21:53:41,250 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2020-08-22 21:53:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:41,252 INFO L225 Difference]: With dead ends: 62 [2020-08-22 21:53:41,252 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 21:53:41,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 21:53:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 21:53:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-08-22 21:53:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 21:53:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-08-22 21:53:41,275 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 66 [2020-08-22 21:53:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:41,275 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-08-22 21:53:41,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 21:53:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-08-22 21:53:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 21:53:41,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:41,279 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:41,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 21:53:41,281 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash 681092950, now seen corresponding path program 4 times [2020-08-22 21:53:41,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:41,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580450501] [2020-08-22 21:53:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:41,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:41,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:41,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:53:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:41,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:41,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:41,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 11 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-22 21:53:41,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580450501] [2020-08-22 21:53:41,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:41,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 21:53:41,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185053556] [2020-08-22 21:53:41,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 21:53:41,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 21:53:41,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:53:41,979 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 24 states. [2020-08-22 21:53:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:42,786 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-08-22 21:53:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 21:53:42,787 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-08-22 21:53:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:42,788 INFO L225 Difference]: With dead ends: 67 [2020-08-22 21:53:42,788 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 21:53:42,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 21:53:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 21:53:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-08-22 21:53:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 21:53:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-08-22 21:53:42,820 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 76 [2020-08-22 21:53:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:42,820 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-08-22 21:53:42,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 21:53:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-08-22 21:53:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 21:53:42,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:42,822 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:42,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 21:53:42,823 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:42,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1036512223, now seen corresponding path program 5 times [2020-08-22 21:53:42,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:42,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60300534] [2020-08-22 21:53:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:42,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:42,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:43,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:43,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:53:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:43,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:43,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:43,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:43,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-22 21:53:43,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60300534] [2020-08-22 21:53:43,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:43,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 21:53:43,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177638208] [2020-08-22 21:53:43,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 21:53:43,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:43,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 21:53:43,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:53:43,470 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 26 states. [2020-08-22 21:53:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:44,544 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-08-22 21:53:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:53:44,544 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 86 [2020-08-22 21:53:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:44,545 INFO L225 Difference]: With dead ends: 72 [2020-08-22 21:53:44,545 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 21:53:44,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 21:53:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 21:53:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-08-22 21:53:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 21:53:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-08-22 21:53:44,572 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 86 [2020-08-22 21:53:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:44,573 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-08-22 21:53:44,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 21:53:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-08-22 21:53:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 21:53:44,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:44,579 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:44,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 21:53:44,580 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash -972388074, now seen corresponding path program 6 times [2020-08-22 21:53:44,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:44,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870787959] [2020-08-22 21:53:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:44,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:44,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:44,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:44,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:44,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:53:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:44,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:44,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-08-22 21:53:44,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870787959] [2020-08-22 21:53:44,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:44,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 21:53:44,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086149137] [2020-08-22 21:53:44,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 21:53:44,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:44,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 21:53:44,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:53:44,938 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 17 states. [2020-08-22 21:53:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:45,462 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-08-22 21:53:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 21:53:45,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-08-22 21:53:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:45,465 INFO L225 Difference]: With dead ends: 76 [2020-08-22 21:53:45,466 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 21:53:45,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-08-22 21:53:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 21:53:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-08-22 21:53:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 21:53:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2020-08-22 21:53:45,489 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 76 [2020-08-22 21:53:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:45,489 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2020-08-22 21:53:45,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 21:53:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2020-08-22 21:53:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 21:53:45,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:45,492 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:45,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 21:53:45,492 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:45,493 INFO L82 PathProgramCache]: Analyzing trace with hash -516505397, now seen corresponding path program 7 times [2020-08-22 21:53:45,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:45,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285821541] [2020-08-22 21:53:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:45,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:45,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:45,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:45,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:45,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:53:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:45,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 21:53:45,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285821541] [2020-08-22 21:53:45,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:45,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 21:53:45,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385376945] [2020-08-22 21:53:45,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 21:53:45,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 21:53:45,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:53:45,835 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand 19 states. [2020-08-22 21:53:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:46,471 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-08-22 21:53:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 21:53:46,471 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-08-22 21:53:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:46,473 INFO L225 Difference]: With dead ends: 76 [2020-08-22 21:53:46,473 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 21:53:46,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2020-08-22 21:53:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 21:53:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-08-22 21:53:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 21:53:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-08-22 21:53:46,487 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 66 [2020-08-22 21:53:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:46,487 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-08-22 21:53:46,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 21:53:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-08-22 21:53:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 21:53:46,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:46,489 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:46,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 21:53:46,489 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:46,490 INFO L82 PathProgramCache]: Analyzing trace with hash -694157514, now seen corresponding path program 8 times [2020-08-22 21:53:46,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:46,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555039480] [2020-08-22 21:53:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:46,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:46,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:46,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:46,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:46,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:53:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:46,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:46,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:47,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:47,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 24 proven. 129 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-08-22 21:53:47,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555039480] [2020-08-22 21:53:47,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:47,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 21:53:47,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516409287] [2020-08-22 21:53:47,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 21:53:47,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:47,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 21:53:47,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:53:47,268 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 26 states. [2020-08-22 21:53:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:48,444 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-08-22 21:53:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:53:48,444 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-08-22 21:53:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:48,446 INFO L225 Difference]: With dead ends: 76 [2020-08-22 21:53:48,446 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 21:53:48,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 21:53:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 21:53:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-08-22 21:53:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 21:53:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-08-22 21:53:48,475 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 96 [2020-08-22 21:53:48,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:48,475 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-08-22 21:53:48,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 21:53:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-08-22 21:53:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 21:53:48,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:48,481 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:48,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 21:53:48,481 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash -27101013, now seen corresponding path program 9 times [2020-08-22 21:53:48,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:48,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201753176] [2020-08-22 21:53:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:48,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:48,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:48,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:48,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:48,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:53:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:48,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:48,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:48,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 19 proven. 95 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-22 21:53:49,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201753176] [2020-08-22 21:53:49,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:49,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 21:53:49,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004487281] [2020-08-22 21:53:49,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 21:53:49,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 21:53:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:53:49,096 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 24 states. [2020-08-22 21:53:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:49,980 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2020-08-22 21:53:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 21:53:49,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-08-22 21:53:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:49,982 INFO L225 Difference]: With dead ends: 76 [2020-08-22 21:53:49,982 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 21:53:49,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 21:53:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 21:53:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-08-22 21:53:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 21:53:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-08-22 21:53:50,000 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 86 [2020-08-22 21:53:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:50,000 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-08-22 21:53:50,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 21:53:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-08-22 21:53:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 21:53:50,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:50,002 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:50,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 21:53:50,002 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1669317558, now seen corresponding path program 10 times [2020-08-22 21:53:50,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:50,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720300753] [2020-08-22 21:53:50,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:53:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 17 proven. 132 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-22 21:53:50,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720300753] [2020-08-22 21:53:50,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:50,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 21:53:50,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215395521] [2020-08-22 21:53:50,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 21:53:50,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:50,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 21:53:50,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:53:50,695 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 28 states. [2020-08-22 21:53:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:51,968 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-08-22 21:53:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:53:51,969 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 96 [2020-08-22 21:53:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:51,970 INFO L225 Difference]: With dead ends: 81 [2020-08-22 21:53:51,970 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 21:53:51,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=267, Invalid=2085, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 21:53:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 21:53:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-08-22 21:53:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 21:53:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-08-22 21:53:51,992 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 96 [2020-08-22 21:53:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:51,993 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-08-22 21:53:51,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 21:53:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-08-22 21:53:51,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 21:53:51,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:51,994 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:51,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 21:53:51,995 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:51,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1979672437, now seen corresponding path program 11 times [2020-08-22 21:53:51,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:51,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140638041] [2020-08-22 21:53:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:53:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-08-22 21:53:52,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140638041] [2020-08-22 21:53:52,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:52,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 21:53:52,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127029474] [2020-08-22 21:53:52,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 21:53:52,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:52,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 21:53:52,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:53:52,861 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 28 states. [2020-08-22 21:53:54,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:54,302 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-08-22 21:53:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:53:54,302 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-08-22 21:53:54,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:54,304 INFO L225 Difference]: With dead ends: 81 [2020-08-22 21:53:54,304 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 21:53:54,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 21:53:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 21:53:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-08-22 21:53:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 21:53:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-22 21:53:54,317 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 106 [2020-08-22 21:53:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:54,317 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-22 21:53:54,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 21:53:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-22 21:53:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 21:53:54,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:54,319 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:54,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 21:53:54,319 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash 275016086, now seen corresponding path program 12 times [2020-08-22 21:53:54,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:54,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786243583] [2020-08-22 21:53:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:53:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-22 21:53:54,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786243583] [2020-08-22 21:53:54,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:54,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 21:53:54,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900285983] [2020-08-22 21:53:54,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 21:53:54,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:54,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 21:53:54,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-08-22 21:53:54,883 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 22 states. [2020-08-22 21:53:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:55,823 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-08-22 21:53:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 21:53:55,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2020-08-22 21:53:55,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:55,826 INFO L225 Difference]: With dead ends: 81 [2020-08-22 21:53:55,826 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 21:53:55,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 21:53:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 21:53:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-08-22 21:53:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 21:53:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-08-22 21:53:55,839 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 76 [2020-08-22 21:53:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:55,839 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-08-22 21:53:55,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 21:53:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-08-22 21:53:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 21:53:55,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:55,842 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:55,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 21:53:55,842 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:55,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1359901377, now seen corresponding path program 13 times [2020-08-22 21:53:55,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:55,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016398596] [2020-08-22 21:53:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:53:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 28 proven. 169 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-08-22 21:53:56,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016398596] [2020-08-22 21:53:56,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:56,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 21:53:56,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25421217] [2020-08-22 21:53:56,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 21:53:56,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:56,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 21:53:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:53:56,515 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 28 states. [2020-08-22 21:53:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:57,881 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2020-08-22 21:53:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:53:57,882 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-08-22 21:53:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:57,883 INFO L225 Difference]: With dead ends: 81 [2020-08-22 21:53:57,883 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 21:53:57,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 21:53:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 21:53:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-08-22 21:53:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 21:53:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-08-22 21:53:57,896 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 106 [2020-08-22 21:53:57,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:57,897 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-08-22 21:53:57,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 21:53:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-08-22 21:53:57,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 21:53:57,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:57,899 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:57,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 21:53:57,899 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:57,900 INFO L82 PathProgramCache]: Analyzing trace with hash 863423990, now seen corresponding path program 14 times [2020-08-22 21:53:57,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:57,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633309272] [2020-08-22 21:53:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:57,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:57,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:58,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:58,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:58,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:58,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:53:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:58,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:58,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:58,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-08-22 21:53:58,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633309272] [2020-08-22 21:53:58,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:53:58,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 21:53:58,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962304347] [2020-08-22 21:53:58,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 21:53:58,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:58,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 21:53:58,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:53:58,387 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 19 states. [2020-08-22 21:53:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:59,062 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-08-22 21:53:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 21:53:59,062 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2020-08-22 21:53:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:59,063 INFO L225 Difference]: With dead ends: 81 [2020-08-22 21:53:59,063 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 21:53:59,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 21:53:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 21:53:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-08-22 21:53:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 21:53:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-08-22 21:53:59,081 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 96 [2020-08-22 21:53:59,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:59,082 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-08-22 21:53:59,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 21:53:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-08-22 21:53:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 21:53:59,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:59,086 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:59,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 21:53:59,086 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:59,086 INFO L82 PathProgramCache]: Analyzing trace with hash -412591530, now seen corresponding path program 15 times [2020-08-22 21:53:59,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:59,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473508208] [2020-08-22 21:53:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:53:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:59,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:53:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 33 proven. 213 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-22 21:54:00,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473508208] [2020-08-22 21:54:00,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:00,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 21:54:00,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199662232] [2020-08-22 21:54:00,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 21:54:00,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 21:54:00,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-08-22 21:54:00,073 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 30 states. [2020-08-22 21:54:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:01,624 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-08-22 21:54:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:54:01,624 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-08-22 21:54:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:01,626 INFO L225 Difference]: With dead ends: 81 [2020-08-22 21:54:01,626 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 21:54:01,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 21:54:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 21:54:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-08-22 21:54:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 21:54:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-08-22 21:54:01,639 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 116 [2020-08-22 21:54:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:01,640 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-08-22 21:54:01,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 21:54:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-08-22 21:54:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 21:54:01,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:01,641 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:01,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 21:54:01,642 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -945819615, now seen corresponding path program 16 times [2020-08-22 21:54:01,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:01,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33353167] [2020-08-22 21:54:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:01,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:01,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:01,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:01,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:01,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:01,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:54:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:02,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:02,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-22 21:54:02,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33353167] [2020-08-22 21:54:02,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:02,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 21:54:02,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590706938] [2020-08-22 21:54:02,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 21:54:02,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:02,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 21:54:02,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:54:02,172 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 24 states. [2020-08-22 21:54:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:03,080 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-08-22 21:54:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 21:54:03,080 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-08-22 21:54:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:03,082 INFO L225 Difference]: With dead ends: 81 [2020-08-22 21:54:03,083 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 21:54:03,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 21:54:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 21:54:03,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-08-22 21:54:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 21:54:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-22 21:54:03,093 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 86 [2020-08-22 21:54:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:03,094 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-22 21:54:03,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 21:54:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-22 21:54:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 21:54:03,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:03,096 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:03,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 21:54:03,096 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:03,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:03,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1946255679, now seen corresponding path program 17 times [2020-08-22 21:54:03,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:03,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699872523] [2020-08-22 21:54:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:54:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 20 proven. 171 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-08-22 21:54:03,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699872523] [2020-08-22 21:54:03,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:03,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 21:54:03,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337439436] [2020-08-22 21:54:03,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 21:54:03,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:03,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 21:54:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-08-22 21:54:03,982 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 30 states. [2020-08-22 21:54:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:05,611 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-08-22 21:54:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:54:05,612 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 106 [2020-08-22 21:54:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:05,613 INFO L225 Difference]: With dead ends: 86 [2020-08-22 21:54:05,613 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 21:54:05,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=302, Invalid=2560, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 21:54:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 21:54:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-08-22 21:54:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 21:54:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-08-22 21:54:05,629 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 106 [2020-08-22 21:54:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:05,630 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-08-22 21:54:05,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 21:54:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-08-22 21:54:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 21:54:05,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:05,631 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:05,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 21:54:05,631 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:05,632 INFO L82 PathProgramCache]: Analyzing trace with hash -657519274, now seen corresponding path program 18 times [2020-08-22 21:54:05,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:05,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748751895] [2020-08-22 21:54:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:05,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:05,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:05,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:05,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:05,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:54:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:06,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:06,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:06,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:06,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:06,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 34 proven. 212 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-22 21:54:06,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748751895] [2020-08-22 21:54:06,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:06,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 21:54:06,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620559951] [2020-08-22 21:54:06,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 21:54:06,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:06,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 21:54:06,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-08-22 21:54:06,515 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 30 states. [2020-08-22 21:54:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:08,309 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-08-22 21:54:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:54:08,310 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-08-22 21:54:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:08,312 INFO L225 Difference]: With dead ends: 90 [2020-08-22 21:54:08,312 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 21:54:08,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=283, Invalid=2579, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 21:54:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 21:54:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-08-22 21:54:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 21:54:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-08-22 21:54:08,324 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 116 [2020-08-22 21:54:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:08,324 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-08-22 21:54:08,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 21:54:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-08-22 21:54:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 21:54:08,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:08,326 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:08,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 21:54:08,326 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1569934689, now seen corresponding path program 19 times [2020-08-22 21:54:08,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:08,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700627977] [2020-08-22 21:54:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:08,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:08,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:08,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:08,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:08,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:08,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:54:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:08,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:08,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:08,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:09,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:09,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:09,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 38 proven. 262 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-08-22 21:54:09,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700627977] [2020-08-22 21:54:09,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:09,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 21:54:09,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26735955] [2020-08-22 21:54:09,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 21:54:09,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:09,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 21:54:09,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-08-22 21:54:09,403 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 32 states. [2020-08-22 21:54:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:11,233 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-08-22 21:54:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:54:11,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-08-22 21:54:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:11,235 INFO L225 Difference]: With dead ends: 86 [2020-08-22 21:54:11,235 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 21:54:11,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=292, Invalid=2788, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 21:54:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 21:54:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-08-22 21:54:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 21:54:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-08-22 21:54:11,248 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 126 [2020-08-22 21:54:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:11,249 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-08-22 21:54:11,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 21:54:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-08-22 21:54:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 21:54:11,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:11,250 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:11,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 21:54:11,250 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:11,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2059208469, now seen corresponding path program 20 times [2020-08-22 21:54:11,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:11,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902596726] [2020-08-22 21:54:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:11,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:11,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:11,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:11,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:11,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:11,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:54:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:11,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:11,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:12,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:12,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 37 proven. 263 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-08-22 21:54:12,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902596726] [2020-08-22 21:54:12,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:12,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 21:54:12,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171863985] [2020-08-22 21:54:12,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 21:54:12,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:12,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 21:54:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-08-22 21:54:12,291 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 32 states. [2020-08-22 21:54:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:14,143 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-08-22 21:54:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:54:14,146 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-08-22 21:54:14,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:14,147 INFO L225 Difference]: With dead ends: 86 [2020-08-22 21:54:14,147 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 21:54:14,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=269, Invalid=2487, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 21:54:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 21:54:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-08-22 21:54:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 21:54:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2020-08-22 21:54:14,159 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 126 [2020-08-22 21:54:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:14,159 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2020-08-22 21:54:14,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 21:54:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2020-08-22 21:54:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 21:54:14,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:14,161 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:14,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 21:54:14,161 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1034127946, now seen corresponding path program 21 times [2020-08-22 21:54:14,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:14,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747047561] [2020-08-22 21:54:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:54:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:14,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:15,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:15,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 42 proven. 317 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-08-22 21:54:15,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747047561] [2020-08-22 21:54:15,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:15,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 21:54:15,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154264961] [2020-08-22 21:54:15,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 21:54:15,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:15,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 21:54:15,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 21:54:15,295 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand 34 states. [2020-08-22 21:54:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:17,426 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2020-08-22 21:54:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:54:17,427 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-08-22 21:54:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:17,429 INFO L225 Difference]: With dead ends: 86 [2020-08-22 21:54:17,429 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 21:54:17,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 21:54:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 21:54:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-08-22 21:54:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 21:54:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-08-22 21:54:17,443 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 136 [2020-08-22 21:54:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:17,444 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-08-22 21:54:17,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 21:54:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-08-22 21:54:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 21:54:17,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:17,445 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:17,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 21:54:17,445 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1452329227, now seen corresponding path program 22 times [2020-08-22 21:54:17,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:17,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529148645] [2020-08-22 21:54:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:17,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:17,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:17,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:17,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:17,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:17,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:17,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:54:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:18,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:18,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:18,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 25 proven. 172 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-08-22 21:54:18,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529148645] [2020-08-22 21:54:18,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:18,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 21:54:18,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865009116] [2020-08-22 21:54:18,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 21:54:18,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 21:54:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:54:18,329 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 28 states. [2020-08-22 21:54:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:19,737 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-08-22 21:54:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:54:19,738 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-08-22 21:54:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:19,739 INFO L225 Difference]: With dead ends: 86 [2020-08-22 21:54:19,739 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 21:54:19,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 21:54:19,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 21:54:19,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-08-22 21:54:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 21:54:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-08-22 21:54:19,752 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 106 [2020-08-22 21:54:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:19,752 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-08-22 21:54:19,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 21:54:19,752 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-08-22 21:54:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 21:54:19,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:19,754 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:19,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 21:54:19,754 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:19,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:19,754 INFO L82 PathProgramCache]: Analyzing trace with hash -261107338, now seen corresponding path program 23 times [2020-08-22 21:54:19,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:19,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485639929] [2020-08-22 21:54:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:19,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:19,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:19,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:19,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:19,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:20,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:20,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:54:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:20,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:20,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 20 proven. 133 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-08-22 21:54:20,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485639929] [2020-08-22 21:54:20,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:20,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 21:54:20,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85417254] [2020-08-22 21:54:20,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 21:54:20,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:20,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 21:54:20,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:54:20,416 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 26 states. [2020-08-22 21:54:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:21,556 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-08-22 21:54:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:54:21,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-08-22 21:54:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:21,558 INFO L225 Difference]: With dead ends: 86 [2020-08-22 21:54:21,558 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 21:54:21,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 21:54:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 21:54:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-08-22 21:54:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 21:54:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2020-08-22 21:54:21,572 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 96 [2020-08-22 21:54:21,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:21,572 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2020-08-22 21:54:21,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 21:54:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2020-08-22 21:54:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 21:54:21,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:21,573 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:21,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 21:54:21,574 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:21,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:21,574 INFO L82 PathProgramCache]: Analyzing trace with hash -274136789, now seen corresponding path program 24 times [2020-08-22 21:54:21,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:21,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324337554] [2020-08-22 21:54:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:21,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:21,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:21,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:21,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:21,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:21,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:21,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:54:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:22,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-08-22 21:54:22,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324337554] [2020-08-22 21:54:22,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:22,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 21:54:22,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788932450] [2020-08-22 21:54:22,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 21:54:22,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:22,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 21:54:22,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:54:22,117 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 24 states. [2020-08-22 21:54:23,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:23,296 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-08-22 21:54:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 21:54:23,296 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-08-22 21:54:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:23,297 INFO L225 Difference]: With dead ends: 86 [2020-08-22 21:54:23,298 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 21:54:23,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 21:54:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 21:54:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-08-22 21:54:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 21:54:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-08-22 21:54:23,310 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 86 [2020-08-22 21:54:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:23,311 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-08-22 21:54:23,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 21:54:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-08-22 21:54:23,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 21:54:23,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:23,312 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:23,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 21:54:23,313 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1695721578, now seen corresponding path program 25 times [2020-08-22 21:54:23,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:23,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455918517] [2020-08-22 21:54:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:54:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 30 proven. 194 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-08-22 21:54:23,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455918517] [2020-08-22 21:54:23,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:23,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 21:54:23,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413588742] [2020-08-22 21:54:23,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 21:54:23,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 21:54:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:54:23,833 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 21 states. [2020-08-22 21:54:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:24,743 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-08-22 21:54:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:54:24,744 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2020-08-22 21:54:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:24,745 INFO L225 Difference]: With dead ends: 86 [2020-08-22 21:54:24,746 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 21:54:24,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 21:54:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 21:54:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-08-22 21:54:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 21:54:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-08-22 21:54:24,760 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 116 [2020-08-22 21:54:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:24,760 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-08-22 21:54:24,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 21:54:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-08-22 21:54:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 21:54:24,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:24,762 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:24,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 21:54:24,762 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:24,762 INFO L82 PathProgramCache]: Analyzing trace with hash -29620202, now seen corresponding path program 26 times [2020-08-22 21:54:24,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:24,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355412618] [2020-08-22 21:54:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:24,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:24,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:24,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:25,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:54:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:25,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:25,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:25,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:25,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:25,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:25,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:25,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 23 proven. 215 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-08-22 21:54:25,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355412618] [2020-08-22 21:54:25,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:25,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 21:54:25,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721785830] [2020-08-22 21:54:25,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 21:54:25,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 21:54:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2020-08-22 21:54:25,805 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 32 states. [2020-08-22 21:54:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:27,724 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2020-08-22 21:54:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:54:27,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 116 [2020-08-22 21:54:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:27,726 INFO L225 Difference]: With dead ends: 91 [2020-08-22 21:54:27,726 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 21:54:27,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=337, Invalid=3085, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 21:54:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 21:54:27,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-08-22 21:54:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:54:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-08-22 21:54:27,741 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 116 [2020-08-22 21:54:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:27,741 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-08-22 21:54:27,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 21:54:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-08-22 21:54:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 21:54:27,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:27,743 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:27,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 21:54:27,743 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:27,743 INFO L82 PathProgramCache]: Analyzing trace with hash 189735019, now seen corresponding path program 27 times [2020-08-22 21:54:27,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:27,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113541321] [2020-08-22 21:54:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:27,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:27,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:27,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:27,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:28,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:54:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:28,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:28,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:28,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:28,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:28,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:28,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:28,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 39 proven. 261 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-08-22 21:54:28,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113541321] [2020-08-22 21:54:28,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:28,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 21:54:28,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538106825] [2020-08-22 21:54:28,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 21:54:28,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 21:54:28,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-08-22 21:54:28,758 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 32 states. [2020-08-22 21:54:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:30,997 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-08-22 21:54:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:54:30,998 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-08-22 21:54:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:30,999 INFO L225 Difference]: With dead ends: 95 [2020-08-22 21:54:30,999 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 21:54:31,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=315, Invalid=3107, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 21:54:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 21:54:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-08-22 21:54:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:54:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-08-22 21:54:31,014 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 126 [2020-08-22 21:54:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:31,015 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-08-22 21:54:31,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 21:54:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-08-22 21:54:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 21:54:31,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:31,016 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:31,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 21:54:31,017 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash -40431946, now seen corresponding path program 28 times [2020-08-22 21:54:31,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:31,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623198864] [2020-08-22 21:54:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:54:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:31,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:32,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 43 proven. 316 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-08-22 21:54:32,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623198864] [2020-08-22 21:54:32,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:32,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 21:54:32,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950729710] [2020-08-22 21:54:32,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 21:54:32,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 21:54:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 21:54:32,191 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 34 states. [2020-08-22 21:54:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:34,563 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-08-22 21:54:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:54:34,564 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-08-22 21:54:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:34,565 INFO L225 Difference]: With dead ends: 95 [2020-08-22 21:54:34,565 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 21:54:34,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=324, Invalid=3336, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 21:54:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 21:54:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-08-22 21:54:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:54:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-08-22 21:54:34,583 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 136 [2020-08-22 21:54:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:34,583 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-08-22 21:54:34,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 21:54:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-08-22 21:54:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 21:54:34,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:34,585 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:34,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 21:54:34,585 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:34,586 INFO L82 PathProgramCache]: Analyzing trace with hash -419589941, now seen corresponding path program 29 times [2020-08-22 21:54:34,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:34,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505701475] [2020-08-22 21:54:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:34,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:34,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:34,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:34,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:34,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:54:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 47 proven. 376 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 21:54:35,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505701475] [2020-08-22 21:54:35,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:35,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 21:54:35,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785524029] [2020-08-22 21:54:35,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 21:54:35,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:35,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 21:54:35,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 21:54:35,966 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 36 states. [2020-08-22 21:54:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:38,546 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2020-08-22 21:54:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:54:38,547 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-08-22 21:54:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:38,549 INFO L225 Difference]: With dead ends: 91 [2020-08-22 21:54:38,549 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 21:54:38,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 21:54:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 21:54:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-08-22 21:54:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 21:54:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-08-22 21:54:38,563 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 146 [2020-08-22 21:54:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:38,563 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-08-22 21:54:38,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 21:54:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-08-22 21:54:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 21:54:38,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:38,564 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:38,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 21:54:38,565 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1145337910, now seen corresponding path program 30 times [2020-08-22 21:54:38,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:38,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596811059] [2020-08-22 21:54:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:38,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:38,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:38,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:38,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:38,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:38,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:38,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:39,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:54:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:39,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 2 proven. 137 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-08-22 21:54:39,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596811059] [2020-08-22 21:54:39,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:39,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 21:54:39,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932958380] [2020-08-22 21:54:39,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 21:54:39,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:39,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 21:54:39,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:54:39,239 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 26 states. [2020-08-22 21:54:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:40,729 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2020-08-22 21:54:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 21:54:40,730 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-08-22 21:54:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:40,732 INFO L225 Difference]: With dead ends: 91 [2020-08-22 21:54:40,732 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 21:54:40,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 21:54:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 21:54:40,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-08-22 21:54:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:54:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2020-08-22 21:54:40,747 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 96 [2020-08-22 21:54:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:40,748 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2020-08-22 21:54:40,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 21:54:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2020-08-22 21:54:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 21:54:40,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:40,749 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:40,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 21:54:40,749 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash -195212138, now seen corresponding path program 31 times [2020-08-22 21:54:40,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:40,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694283983] [2020-08-22 21:54:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:40,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:40,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:40,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:40,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:41,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:41,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:41,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:41,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:54:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:41,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:41,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:41,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 29 proven. 217 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-22 21:54:41,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694283983] [2020-08-22 21:54:41,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:41,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 21:54:41,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979627511] [2020-08-22 21:54:41,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 21:54:41,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:41,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 21:54:41,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-08-22 21:54:41,707 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand 30 states. [2020-08-22 21:54:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:43,477 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2020-08-22 21:54:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:54:43,478 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-08-22 21:54:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:43,480 INFO L225 Difference]: With dead ends: 91 [2020-08-22 21:54:43,480 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 21:54:43,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 21:54:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 21:54:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-08-22 21:54:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:54:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2020-08-22 21:54:43,503 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 116 [2020-08-22 21:54:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:43,503 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2020-08-22 21:54:43,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 21:54:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2020-08-22 21:54:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 21:54:43,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:43,505 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:43,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 21:54:43,506 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:43,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:43,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1230973281, now seen corresponding path program 32 times [2020-08-22 21:54:43,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:43,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345132225] [2020-08-22 21:54:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:43,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:43,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:43,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:43,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:43,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:43,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:44,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:44,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:54:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:44,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:44,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:44,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:44,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 34 proven. 266 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-08-22 21:54:44,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345132225] [2020-08-22 21:54:44,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:44,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 21:54:44,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887697814] [2020-08-22 21:54:44,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 21:54:44,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:44,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 21:54:44,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-08-22 21:54:44,702 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 32 states. [2020-08-22 21:54:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:46,629 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-08-22 21:54:46,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:54:46,630 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-08-22 21:54:46,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:46,632 INFO L225 Difference]: With dead ends: 91 [2020-08-22 21:54:46,632 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 21:54:46,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=269, Invalid=2487, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 21:54:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 21:54:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-08-22 21:54:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:54:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-08-22 21:54:46,647 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 126 [2020-08-22 21:54:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:46,647 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-08-22 21:54:46,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 21:54:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-08-22 21:54:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 21:54:46,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:46,649 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 21:54:46,649 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash 875968193, now seen corresponding path program 33 times [2020-08-22 21:54:46,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:46,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631390390] [2020-08-22 21:54:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:46,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:46,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:46,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:46,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:47,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:47,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:47,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:54:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:47,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:47,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-08-22 21:54:47,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631390390] [2020-08-22 21:54:47,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:47,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 21:54:47,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298950377] [2020-08-22 21:54:47,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 21:54:47,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:47,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 21:54:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:54:47,503 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 28 states. [2020-08-22 21:54:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:49,154 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2020-08-22 21:54:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:54:49,155 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-08-22 21:54:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:49,156 INFO L225 Difference]: With dead ends: 91 [2020-08-22 21:54:49,156 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 21:54:49,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 21:54:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 21:54:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-08-22 21:54:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:54:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-08-22 21:54:49,171 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 106 [2020-08-22 21:54:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:49,171 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-08-22 21:54:49,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 21:54:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-08-22 21:54:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 21:54:49,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:49,173 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:49,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 21:54:49,173 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:49,174 INFO L82 PathProgramCache]: Analyzing trace with hash 432172374, now seen corresponding path program 34 times [2020-08-22 21:54:49,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:49,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393523219] [2020-08-22 21:54:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:54:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:49,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:50,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:50,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:50,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:50,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:50,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 51 proven. 441 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-08-22 21:54:50,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393523219] [2020-08-22 21:54:50,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:50,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 21:54:50,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850774331] [2020-08-22 21:54:50,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 21:54:50,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:50,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 21:54:50,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 21:54:50,728 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 38 states. [2020-08-22 21:54:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:53,573 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2020-08-22 21:54:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:54:53,574 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-08-22 21:54:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:53,575 INFO L225 Difference]: With dead ends: 91 [2020-08-22 21:54:53,576 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 21:54:53,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=342, Invalid=3818, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 21:54:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 21:54:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-08-22 21:54:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:54:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-08-22 21:54:53,592 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 156 [2020-08-22 21:54:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:53,592 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-08-22 21:54:53,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 21:54:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-08-22 21:54:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 21:54:53,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:53,594 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:53,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 21:54:53,594 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:53,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1639794934, now seen corresponding path program 35 times [2020-08-22 21:54:53,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:53,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549773800] [2020-08-22 21:54:53,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:53,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:53,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:53,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:53,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:53,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:53,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:54,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:54,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:54:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:54,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:54,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:54,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:54,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:54,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 39 proven. 293 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-08-22 21:54:54,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549773800] [2020-08-22 21:54:54,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:54,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 21:54:54,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628889548] [2020-08-22 21:54:54,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 21:54:54,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:54,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 21:54:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:54:54,286 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 23 states. [2020-08-22 21:54:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:55,537 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2020-08-22 21:54:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:54:55,538 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2020-08-22 21:54:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:55,539 INFO L225 Difference]: With dead ends: 91 [2020-08-22 21:54:55,539 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 21:54:55,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 21:54:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 21:54:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-08-22 21:54:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:54:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-08-22 21:54:55,554 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 136 [2020-08-22 21:54:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:55,555 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-08-22 21:54:55,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 21:54:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-08-22 21:54:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 21:54:55,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:55,556 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:55,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 21:54:55,556 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1408863231, now seen corresponding path program 36 times [2020-08-22 21:54:55,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:55,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282594414] [2020-08-22 21:54:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:55,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:55,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:55,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:55,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:55,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:55,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:56,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:56,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:54:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:56,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:56,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:56,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:56,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:56,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:56,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 46 proven. 377 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 21:54:56,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282594414] [2020-08-22 21:54:56,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:54:56,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 21:54:56,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405776202] [2020-08-22 21:54:56,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 21:54:56,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:54:56,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 21:54:56,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 21:54:56,933 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 36 states. [2020-08-22 21:54:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:54:59,433 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2020-08-22 21:54:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:54:59,435 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-08-22 21:54:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:54:59,437 INFO L225 Difference]: With dead ends: 91 [2020-08-22 21:54:59,437 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 21:54:59,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=310, Invalid=3230, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 21:54:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 21:54:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-08-22 21:54:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 21:54:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-08-22 21:54:59,456 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 146 [2020-08-22 21:54:59,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:54:59,456 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-08-22 21:54:59,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 21:54:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-08-22 21:54:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 21:54:59,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:54:59,459 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:54:59,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 21:54:59,460 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:54:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:54:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash -694861471, now seen corresponding path program 37 times [2020-08-22 21:54:59,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:54:59,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406483854] [2020-08-22 21:54:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:54:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:59,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:54:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:59,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:54:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:59,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:59,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:54:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:54:59,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:54:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:00,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:00,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:00,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:00,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:00,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:00,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:00,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2020-08-22 21:55:00,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406483854] [2020-08-22 21:55:00,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:00,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 21:55:00,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523672872] [2020-08-22 21:55:00,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 21:55:00,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:00,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 21:55:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 21:55:00,891 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 34 states. [2020-08-22 21:55:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:03,507 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-08-22 21:55:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:55:03,509 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 126 [2020-08-22 21:55:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:03,511 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:03,511 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:03,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=372, Invalid=3660, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 21:55:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-08-22 21:55:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-08-22 21:55:03,530 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 126 [2020-08-22 21:55:03,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:03,531 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-08-22 21:55:03,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 21:55:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-08-22 21:55:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 21:55:03,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:03,532 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:03,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 21:55:03,533 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash -929451146, now seen corresponding path program 38 times [2020-08-22 21:55:03,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:03,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955891002] [2020-08-22 21:55:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:03,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:03,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:03,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:03,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:03,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:55:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:03,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:04,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:04,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:04,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:04,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:04,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:04,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:04,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 44 proven. 315 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-08-22 21:55:04,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955891002] [2020-08-22 21:55:04,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:04,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 21:55:04,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987041737] [2020-08-22 21:55:04,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 21:55:04,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:04,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 21:55:04,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 21:55:04,962 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 34 states. [2020-08-22 21:55:08,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:08,077 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-08-22 21:55:08,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:55:08,078 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-08-22 21:55:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:08,079 INFO L225 Difference]: With dead ends: 100 [2020-08-22 21:55:08,080 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 21:55:08,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=347, Invalid=3685, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 21:55:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 21:55:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-08-22 21:55:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-08-22 21:55:08,096 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 136 [2020-08-22 21:55:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:08,096 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-08-22 21:55:08,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 21:55:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-08-22 21:55:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 21:55:08,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:08,097 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:08,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 21:55:08,097 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash 189825025, now seen corresponding path program 39 times [2020-08-22 21:55:08,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:08,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648082942] [2020-08-22 21:55:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:55:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:08,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:09,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:09,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:09,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:09,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 48 proven. 375 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 21:55:09,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648082942] [2020-08-22 21:55:09,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:09,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 21:55:09,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678136903] [2020-08-22 21:55:09,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 21:55:09,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 21:55:09,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 21:55:09,554 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 36 states. [2020-08-22 21:55:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:12,582 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-08-22 21:55:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:55:12,584 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-08-22 21:55:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:12,586 INFO L225 Difference]: With dead ends: 100 [2020-08-22 21:55:12,586 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 21:55:12,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=356, Invalid=3934, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 21:55:12,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 21:55:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-08-22 21:55:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-08-22 21:55:12,607 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 146 [2020-08-22 21:55:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:12,608 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-08-22 21:55:12,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 21:55:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-08-22 21:55:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 21:55:12,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:12,609 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:12,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 21:55:12,609 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1186933718, now seen corresponding path program 40 times [2020-08-22 21:55:12,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:12,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596548703] [2020-08-22 21:55:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:12,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:12,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:12,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:12,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:12,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:13,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:13,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:55:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:13,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:13,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:13,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:13,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:13,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:13,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:14,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 52 proven. 440 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-08-22 21:55:14,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596548703] [2020-08-22 21:55:14,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:14,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 21:55:14,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571646251] [2020-08-22 21:55:14,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 21:55:14,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:14,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 21:55:14,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 21:55:14,276 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 38 states. [2020-08-22 21:55:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:17,441 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-08-22 21:55:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:55:17,443 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-08-22 21:55:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:17,444 INFO L225 Difference]: With dead ends: 100 [2020-08-22 21:55:17,444 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 21:55:17,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=365, Invalid=4191, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 21:55:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 21:55:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-08-22 21:55:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-08-22 21:55:17,460 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 156 [2020-08-22 21:55:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:17,461 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-08-22 21:55:17,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 21:55:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-08-22 21:55:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 21:55:17,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:17,462 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:17,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 21:55:17,462 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:17,463 INFO L82 PathProgramCache]: Analyzing trace with hash 911087265, now seen corresponding path program 41 times [2020-08-22 21:55:17,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:17,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940990966] [2020-08-22 21:55:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:17,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:17,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:17,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:17,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:17,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:17,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:18,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:18,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:55:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:18,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:18,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:18,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:18,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:18,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:18,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:19,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:19,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 56 proven. 510 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-08-22 21:55:19,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940990966] [2020-08-22 21:55:19,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:19,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 21:55:19,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265839443] [2020-08-22 21:55:19,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 21:55:19,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:19,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 21:55:19,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 21:55:19,334 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 40 states. [2020-08-22 21:55:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:22,847 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2020-08-22 21:55:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:55:22,848 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-08-22 21:55:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:22,849 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:22,849 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:22,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=374, Invalid=4456, Unknown=0, NotChecked=0, Total=4830 [2020-08-22 21:55:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-08-22 21:55:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 21:55:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2020-08-22 21:55:22,868 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 166 [2020-08-22 21:55:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:22,868 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2020-08-22 21:55:22,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 21:55:22,868 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2020-08-22 21:55:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 21:55:22,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:22,869 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:22,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 21:55:22,870 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:22,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1055905782, now seen corresponding path program 42 times [2020-08-22 21:55:22,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:22,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209352605] [2020-08-22 21:55:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:22,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:22,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:23,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:23,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:23,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:23,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:23,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:23,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:23,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:55:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:23,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:23,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:24,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:24,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 38 proven. 321 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-08-22 21:55:24,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209352605] [2020-08-22 21:55:24,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:24,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 21:55:24,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558261202] [2020-08-22 21:55:24,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 21:55:24,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 21:55:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 21:55:24,243 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 34 states. [2020-08-22 21:55:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:26,867 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2020-08-22 21:55:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:55:26,867 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-08-22 21:55:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:26,869 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:26,869 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:26,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 21:55:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-08-22 21:55:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2020-08-22 21:55:26,883 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 136 [2020-08-22 21:55:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:26,884 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2020-08-22 21:55:26,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 21:55:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2020-08-22 21:55:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 21:55:26,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:26,885 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:26,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 21:55:26,885 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:26,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1891221141, now seen corresponding path program 43 times [2020-08-22 21:55:26,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:26,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436874827] [2020-08-22 21:55:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:26,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:26,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:55:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:27,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 33 proven. 267 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-08-22 21:55:28,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436874827] [2020-08-22 21:55:28,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:28,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 21:55:28,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993529144] [2020-08-22 21:55:28,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 21:55:28,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:28,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 21:55:28,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-08-22 21:55:28,053 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand 32 states. [2020-08-22 21:55:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:30,451 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2020-08-22 21:55:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:55:30,451 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-08-22 21:55:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:30,453 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:30,453 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:30,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=292, Invalid=2788, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 21:55:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-08-22 21:55:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2020-08-22 21:55:30,470 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 126 [2020-08-22 21:55:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:30,471 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2020-08-22 21:55:30,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 21:55:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2020-08-22 21:55:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 21:55:30,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:30,472 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:30,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 21:55:30,472 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:30,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1458252075, now seen corresponding path program 44 times [2020-08-22 21:55:30,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:30,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034161399] [2020-08-22 21:55:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:30,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:30,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:30,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:30,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:30,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:30,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:30,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:31,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:31,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:55:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:31,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:31,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:31,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:31,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:31,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:32,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:32,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 55 proven. 511 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-08-22 21:55:32,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034161399] [2020-08-22 21:55:32,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:32,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 21:55:32,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924378406] [2020-08-22 21:55:32,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 21:55:32,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 21:55:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 21:55:32,352 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand 40 states. [2020-08-22 21:55:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:35,853 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2020-08-22 21:55:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:55:35,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-08-22 21:55:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:35,856 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:35,856 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:35,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=351, Invalid=4071, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 21:55:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-08-22 21:55:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 109 transitions. [2020-08-22 21:55:35,873 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 109 transitions. Word has length 166 [2020-08-22 21:55:35,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:35,874 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 109 transitions. [2020-08-22 21:55:35,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 21:55:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 109 transitions. [2020-08-22 21:55:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 21:55:35,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:35,875 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:35,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 21:55:35,875 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:35,876 INFO L82 PathProgramCache]: Analyzing trace with hash 307350582, now seen corresponding path program 45 times [2020-08-22 21:55:35,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:35,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016657340] [2020-08-22 21:55:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:35,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:35,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:36,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:36,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:36,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:36,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:36,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:36,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:36,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:55:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:36,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:37,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:37,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:37,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:37,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:37,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:37,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:37,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 60 proven. 585 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-08-22 21:55:38,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016657340] [2020-08-22 21:55:38,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:38,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 21:55:38,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232961112] [2020-08-22 21:55:38,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 21:55:38,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:38,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 21:55:38,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 21:55:38,119 INFO L87 Difference]: Start difference. First operand 84 states and 109 transitions. Second operand 42 states. [2020-08-22 21:55:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:42,704 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-08-22 21:55:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:55:42,705 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-08-22 21:55:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:42,705 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:42,706 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:42,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=383, Invalid=4729, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 21:55:42,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-08-22 21:55:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2020-08-22 21:55:42,726 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 176 [2020-08-22 21:55:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:42,726 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2020-08-22 21:55:42,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 21:55:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2020-08-22 21:55:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 21:55:42,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:42,728 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:42,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 21:55:42,728 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:42,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2055535082, now seen corresponding path program 46 times [2020-08-22 21:55:42,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:42,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060133530] [2020-08-22 21:55:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:42,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:42,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:42,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:42,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:55:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 48 proven. 412 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-08-22 21:55:43,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060133530] [2020-08-22 21:55:43,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:43,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 21:55:43,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741319623] [2020-08-22 21:55:43,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 21:55:43,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:43,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 21:55:43,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:55:43,615 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand 25 states. [2020-08-22 21:55:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:45,544 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-08-22 21:55:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:55:45,545 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 156 [2020-08-22 21:55:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:45,547 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:45,547 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:45,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 21:55:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-08-22 21:55:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2020-08-22 21:55:45,566 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 156 [2020-08-22 21:55:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:45,566 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2020-08-22 21:55:45,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 21:55:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2020-08-22 21:55:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 21:55:45,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:45,567 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:45,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 21:55:45,568 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:45,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2058240470, now seen corresponding path program 47 times [2020-08-22 21:55:45,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:45,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139644839] [2020-08-22 21:55:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:45,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:45,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:45,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:45,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:45,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:45,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:46,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:46,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:55:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:46,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:46,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 28 proven. 218 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-22 21:55:46,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139644839] [2020-08-22 21:55:46,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:46,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 21:55:46,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359447515] [2020-08-22 21:55:46,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 21:55:46,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 21:55:46,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-08-22 21:55:46,754 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand 30 states. [2020-08-22 21:55:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:49,011 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2020-08-22 21:55:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:55:49,012 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-08-22 21:55:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:49,014 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:49,014 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:49,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=283, Invalid=2579, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 21:55:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:49,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-08-22 21:55:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2020-08-22 21:55:49,032 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 116 [2020-08-22 21:55:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:49,032 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2020-08-22 21:55:49,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 21:55:49,033 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2020-08-22 21:55:49,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 21:55:49,033 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:49,034 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:49,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 21:55:49,034 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2076600715, now seen corresponding path program 48 times [2020-08-22 21:55:49,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:49,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496334086] [2020-08-22 21:55:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:55:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 2 proven. 175 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-08-22 21:55:49,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496334086] [2020-08-22 21:55:49,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:49,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 21:55:49,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699533705] [2020-08-22 21:55:49,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 21:55:49,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 21:55:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:55:49,940 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand 27 states. [2020-08-22 21:55:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:52,151 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-08-22 21:55:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 21:55:52,153 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 106 [2020-08-22 21:55:52,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:52,155 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:52,155 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:52,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=271, Invalid=2381, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 21:55:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-08-22 21:55:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:55:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-08-22 21:55:52,174 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 106 [2020-08-22 21:55:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:52,174 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-08-22 21:55:52,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 21:55:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-08-22 21:55:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 21:55:52,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:52,175 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:52,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 21:55:52,176 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:52,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1108836021, now seen corresponding path program 49 times [2020-08-22 21:55:52,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:52,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939084774] [2020-08-22 21:55:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:52,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:52,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:52,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:52,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:52,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:52,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:52,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:52,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:53,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:55:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:53,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:53,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:53,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:53,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:53,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 43 proven. 380 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 21:55:53,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939084774] [2020-08-22 21:55:53,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:53,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 21:55:53,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6533197] [2020-08-22 21:55:53,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 21:55:53,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:53,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 21:55:53,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 21:55:53,796 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 36 states. [2020-08-22 21:55:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:55:56,519 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2020-08-22 21:55:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 21:55:56,521 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-08-22 21:55:56,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:55:56,523 INFO L225 Difference]: With dead ends: 96 [2020-08-22 21:55:56,523 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 21:55:56,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=310, Invalid=3230, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 21:55:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 21:55:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-08-22 21:55:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 21:55:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2020-08-22 21:55:56,541 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 146 [2020-08-22 21:55:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:55:56,541 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2020-08-22 21:55:56,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 21:55:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2020-08-22 21:55:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 21:55:56,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:55:56,543 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:55:56,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 21:55:56,543 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:55:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:55:56,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2024502390, now seen corresponding path program 50 times [2020-08-22 21:55:56,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:55:56,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61941257] [2020-08-22 21:55:56,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:55:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:56,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:55:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:56,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:55:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:56,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:56,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:55:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:56,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:57,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:57,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:57,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:57,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:57,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:57,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:57,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:57,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:55:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:55:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 29 proven. 318 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2020-08-22 21:55:58,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61941257] [2020-08-22 21:55:58,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:55:58,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 21:55:58,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750882288] [2020-08-22 21:55:58,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 21:55:58,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:55:58,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 21:55:58,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 21:55:58,113 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 36 states. [2020-08-22 21:56:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:01,806 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2020-08-22 21:56:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 21:56:01,808 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2020-08-22 21:56:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:01,809 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:56:01,809 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:56:01,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=407, Invalid=4285, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 21:56:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:56:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 21:56:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:56:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-08-22 21:56:01,834 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 136 [2020-08-22 21:56:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:01,834 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-08-22 21:56:01,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 21:56:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-08-22 21:56:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 21:56:01,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:01,836 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:01,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 21:56:01,836 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1005842357, now seen corresponding path program 51 times [2020-08-22 21:56:01,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:01,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093608696] [2020-08-22 21:56:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:01,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:01,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:02,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:02,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:02,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:56:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:02,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:02,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:02,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:02,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:02,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:02,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:03,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:03,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:03,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 49 proven. 374 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 21:56:03,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093608696] [2020-08-22 21:56:03,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:56:03,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 21:56:03,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324482530] [2020-08-22 21:56:03,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 21:56:03,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:56:03,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 21:56:03,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 21:56:03,594 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 36 states. [2020-08-22 21:56:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:07,285 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-08-22 21:56:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 21:56:07,286 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-08-22 21:56:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:07,287 INFO L225 Difference]: With dead ends: 105 [2020-08-22 21:56:07,288 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 21:56:07,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 21:56:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 21:56:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-08-22 21:56:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:56:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-08-22 21:56:07,312 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 146 [2020-08-22 21:56:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:07,312 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-08-22 21:56:07,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 21:56:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-08-22 21:56:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 21:56:07,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:07,313 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:07,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 21:56:07,314 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:07,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:07,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1310659818, now seen corresponding path program 52 times [2020-08-22 21:56:07,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:07,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117942087] [2020-08-22 21:56:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:07,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:07,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:07,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:07,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:07,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:07,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:56:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:07,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:08,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:08,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:08,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:08,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:08,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:08,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:08,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:09,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 53 proven. 439 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-08-22 21:56:09,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117942087] [2020-08-22 21:56:09,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:56:09,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 21:56:09,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721990141] [2020-08-22 21:56:09,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 21:56:09,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:56:09,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 21:56:09,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 21:56:09,291 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 38 states. [2020-08-22 21:56:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:13,663 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-08-22 21:56:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 21:56:13,664 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-08-22 21:56:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:13,666 INFO L225 Difference]: With dead ends: 105 [2020-08-22 21:56:13,666 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 21:56:13,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=388, Invalid=4582, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 21:56:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 21:56:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-08-22 21:56:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:56:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-08-22 21:56:13,683 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 156 [2020-08-22 21:56:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:13,683 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-08-22 21:56:13,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 21:56:13,683 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-08-22 21:56:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 21:56:13,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:13,684 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:13,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 21:56:13,684 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:13,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1585540949, now seen corresponding path program 53 times [2020-08-22 21:56:13,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:13,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276139389] [2020-08-22 21:56:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:13,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:13,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:13,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:14,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:14,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:14,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:56:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:14,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:14,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:14,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:14,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:14,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:15,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:15,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:15,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:15,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 57 proven. 509 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-08-22 21:56:15,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276139389] [2020-08-22 21:56:15,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:56:15,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 21:56:15,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358201026] [2020-08-22 21:56:15,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 21:56:15,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:56:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 21:56:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 21:56:15,940 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 40 states. [2020-08-22 21:56:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:20,426 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-08-22 21:56:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 21:56:20,428 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-08-22 21:56:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:20,429 INFO L225 Difference]: With dead ends: 105 [2020-08-22 21:56:20,429 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 21:56:20,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=397, Invalid=4859, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 21:56:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 21:56:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-08-22 21:56:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:56:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-08-22 21:56:20,446 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 166 [2020-08-22 21:56:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:20,447 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-08-22 21:56:20,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 21:56:20,447 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-08-22 21:56:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 21:56:20,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:20,448 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:20,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 21:56:20,448 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:20,448 INFO L82 PathProgramCache]: Analyzing trace with hash 340441526, now seen corresponding path program 54 times [2020-08-22 21:56:20,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:20,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074771126] [2020-08-22 21:56:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:20,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:20,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:20,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:20,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:20,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:20,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:21,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:21,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:56:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:21,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:21,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:21,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:21,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:22,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:22,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:22,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:22,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:22,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 61 proven. 584 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-08-22 21:56:22,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074771126] [2020-08-22 21:56:22,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:56:22,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 21:56:22,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922756857] [2020-08-22 21:56:22,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 21:56:22,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:56:22,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 21:56:22,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 21:56:22,957 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 42 states. [2020-08-22 21:56:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:28,044 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-08-22 21:56:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 21:56:28,045 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-08-22 21:56:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:28,046 INFO L225 Difference]: With dead ends: 105 [2020-08-22 21:56:28,046 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 21:56:28,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=406, Invalid=5144, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 21:56:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 21:56:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-08-22 21:56:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:56:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-08-22 21:56:28,070 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 176 [2020-08-22 21:56:28,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:28,071 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-08-22 21:56:28,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 21:56:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-08-22 21:56:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 21:56:28,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:28,072 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:28,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 21:56:28,073 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:28,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:28,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1678522635, now seen corresponding path program 55 times [2020-08-22 21:56:28,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:28,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662966651] [2020-08-22 21:56:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:28,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:28,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:28,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:28,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:28,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:28,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:28,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:28,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:29,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:56:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:29,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:29,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:29,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:29,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:29,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:29,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:30,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:30,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:30,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 65 proven. 664 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-08-22 21:56:30,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662966651] [2020-08-22 21:56:30,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:56:30,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 21:56:30,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986325102] [2020-08-22 21:56:30,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 21:56:30,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:56:30,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 21:56:30,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 21:56:30,826 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 44 states. [2020-08-22 21:56:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:36,376 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-08-22 21:56:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 21:56:36,378 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-08-22 21:56:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:36,380 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:56:36,380 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:56:36,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=415, Invalid=5437, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 21:56:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:56:36,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-08-22 21:56:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 21:56:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2020-08-22 21:56:36,401 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 186 [2020-08-22 21:56:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:36,401 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2020-08-22 21:56:36,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 21:56:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2020-08-22 21:56:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 21:56:36,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:36,402 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:36,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 21:56:36,403 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1770313057, now seen corresponding path program 56 times [2020-08-22 21:56:36,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:36,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864337625] [2020-08-22 21:56:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:36,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:36,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:36,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:36,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:36,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:36,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:36,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:37,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:37,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:37,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:56:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:37,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:37,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 32 proven. 268 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-08-22 21:56:37,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864337625] [2020-08-22 21:56:37,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:56:37,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 21:56:37,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223082848] [2020-08-22 21:56:37,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 21:56:37,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:56:37,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 21:56:37,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-08-22 21:56:37,939 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand 32 states. [2020-08-22 21:56:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:41,189 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-08-22 21:56:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:56:41,191 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-08-22 21:56:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:41,193 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:56:41,193 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:56:41,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=315, Invalid=3107, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 21:56:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:56:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 21:56:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:56:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2020-08-22 21:56:41,209 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 126 [2020-08-22 21:56:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:41,209 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2020-08-22 21:56:41,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 21:56:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2020-08-22 21:56:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 21:56:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:41,210 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:41,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 21:56:41,210 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash -487924010, now seen corresponding path program 57 times [2020-08-22 21:56:41,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:41,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763876610] [2020-08-22 21:56:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:41,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:41,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:41,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:41,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:41,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:41,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:41,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:41,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:41,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:42,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:56:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:42,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 2 proven. 220 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-08-22 21:56:42,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763876610] [2020-08-22 21:56:42,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:56:42,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 21:56:42,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543057909] [2020-08-22 21:56:42,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 21:56:42,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:56:42,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 21:56:42,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2020-08-22 21:56:42,473 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 29 states. [2020-08-22 21:56:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:45,627 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2020-08-22 21:56:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 21:56:45,629 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-08-22 21:56:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:45,629 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:56:45,630 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:56:45,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=2889, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 21:56:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:56:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 21:56:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:56:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2020-08-22 21:56:45,648 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 116 [2020-08-22 21:56:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:45,648 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2020-08-22 21:56:45,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 21:56:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2020-08-22 21:56:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 21:56:45,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:45,649 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:45,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 21:56:45,649 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:45,650 INFO L82 PathProgramCache]: Analyzing trace with hash 315373569, now seen corresponding path program 58 times [2020-08-22 21:56:45,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:45,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805886118] [2020-08-22 21:56:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:45,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:45,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:45,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:45,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:46,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:46,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:46,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:46,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:46,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:56:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:47,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:47,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:47,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:47,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 42 proven. 381 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 21:56:47,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805886118] [2020-08-22 21:56:47,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:56:47,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 21:56:47,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454085411] [2020-08-22 21:56:47,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 21:56:47,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:56:47,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 21:56:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 21:56:47,720 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 36 states. [2020-08-22 21:56:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:51,747 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2020-08-22 21:56:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:56:51,749 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-08-22 21:56:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:51,749 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:56:51,750 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:56:51,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 21:56:51,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:56:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 21:56:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:56:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2020-08-22 21:56:51,765 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 146 [2020-08-22 21:56:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:51,766 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2020-08-22 21:56:51,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 21:56:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2020-08-22 21:56:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 21:56:51,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:51,767 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:51,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 21:56:51,767 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:51,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1174801759, now seen corresponding path program 59 times [2020-08-22 21:56:51,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:51,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836371672] [2020-08-22 21:56:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:51,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:51,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:51,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:52,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:52,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:52,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:52,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:52,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:52,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:53,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:56:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:53,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:53,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:53,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:53,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:53,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:54,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 52 proven. 514 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-08-22 21:56:54,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836371672] [2020-08-22 21:56:54,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:56:54,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 21:56:54,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147346242] [2020-08-22 21:56:54,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 21:56:54,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:56:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 21:56:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 21:56:54,373 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 40 states. [2020-08-22 21:56:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:56:59,231 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2020-08-22 21:56:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:56:59,233 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-08-22 21:56:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:56:59,234 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:56:59,234 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:56:59,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=351, Invalid=4071, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 21:56:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:56:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 21:56:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:56:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2020-08-22 21:56:59,251 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 166 [2020-08-22 21:56:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:56:59,251 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2020-08-22 21:56:59,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 21:56:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2020-08-22 21:56:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-08-22 21:56:59,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:56:59,252 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:56:59,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 21:56:59,252 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:56:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:56:59,252 INFO L82 PathProgramCache]: Analyzing trace with hash 453697622, now seen corresponding path program 60 times [2020-08-22 21:56:59,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:56:59,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069261312] [2020-08-22 21:56:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:56:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:59,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:56:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:59,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:56:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:59,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:59,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:59,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:59,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:56:59,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:56:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:00,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:00,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:00,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:57:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:00,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:00,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:01,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:01,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:01,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:01,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:01,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:02,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:02,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 69 proven. 749 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-08-22 21:57:02,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069261312] [2020-08-22 21:57:02,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:57:02,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 21:57:02,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146063482] [2020-08-22 21:57:02,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 21:57:02,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:57:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 21:57:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 21:57:02,627 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand 46 states. [2020-08-22 21:57:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:57:09,120 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2020-08-22 21:57:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 21:57:09,122 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 196 [2020-08-22 21:57:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:57:09,123 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:57:09,123 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:57:09,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=424, Invalid=5738, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 21:57:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:57:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 21:57:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:57:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2020-08-22 21:57:09,145 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 196 [2020-08-22 21:57:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:57:09,145 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2020-08-22 21:57:09,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 21:57:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2020-08-22 21:57:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 21:57:09,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:57:09,147 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:57:09,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 21:57:09,147 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:57:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:57:09,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1751085162, now seen corresponding path program 61 times [2020-08-22 21:57:09,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:57:09,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424183334] [2020-08-22 21:57:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:57:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:09,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:57:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:09,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:57:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:09,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:09,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:09,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:09,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:09,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:09,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:10,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:10,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:57:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:10,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:10,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:10,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:11,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:11,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 47 proven. 445 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-08-22 21:57:11,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424183334] [2020-08-22 21:57:11,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:57:11,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 21:57:11,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124880300] [2020-08-22 21:57:11,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 21:57:11,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:57:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 21:57:11,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 21:57:11,505 INFO L87 Difference]: Start difference. First operand 89 states and 115 transitions. Second operand 38 states. [2020-08-22 21:57:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:57:16,238 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2020-08-22 21:57:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:57:16,240 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-08-22 21:57:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:57:16,240 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:57:16,240 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:57:16,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=342, Invalid=3818, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 21:57:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:57:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 21:57:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:57:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-08-22 21:57:16,260 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 156 [2020-08-22 21:57:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:57:16,261 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-08-22 21:57:16,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 21:57:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-08-22 21:57:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 21:57:16,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:57:16,262 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:57:16,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 21:57:16,263 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:57:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:57:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash 853550070, now seen corresponding path program 62 times [2020-08-22 21:57:16,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:57:16,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046623834] [2020-08-22 21:57:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:57:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:16,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:57:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:16,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:57:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:16,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:16,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:16,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:16,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:16,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:57:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 57 proven. 551 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-08-22 21:57:17,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046623834] [2020-08-22 21:57:17,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:57:17,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 21:57:17,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790758167] [2020-08-22 21:57:17,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 21:57:17,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:57:17,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 21:57:17,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:57:17,666 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 27 states. [2020-08-22 21:57:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:57:20,696 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2020-08-22 21:57:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:57:20,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 176 [2020-08-22 21:57:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:57:20,700 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:57:20,700 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:57:20,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 21:57:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:57:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 21:57:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:57:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2020-08-22 21:57:20,724 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 176 [2020-08-22 21:57:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:57:20,724 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2020-08-22 21:57:20,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 21:57:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2020-08-22 21:57:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 21:57:20,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:57:20,725 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:57:20,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-08-22 21:57:20,725 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:57:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:57:20,726 INFO L82 PathProgramCache]: Analyzing trace with hash -181402303, now seen corresponding path program 63 times [2020-08-22 21:57:20,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:57:20,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563766797] [2020-08-22 21:57:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:57:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:20,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:57:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:20,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:57:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:20,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:21,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:21,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:21,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:21,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:21,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:21,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:22,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:57:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:22,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:22,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:22,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:22,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:22,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:23,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:23,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:23,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 64 proven. 665 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-08-22 21:57:23,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563766797] [2020-08-22 21:57:23,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:57:23,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 21:57:23,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337735283] [2020-08-22 21:57:23,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 21:57:23,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:57:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 21:57:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 21:57:23,929 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 44 states. [2020-08-22 21:57:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:57:30,512 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2020-08-22 21:57:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:57:30,515 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-08-22 21:57:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:57:30,516 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:57:30,516 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:57:30,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=392, Invalid=5010, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 21:57:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:57:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 21:57:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 21:57:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-08-22 21:57:30,538 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 186 [2020-08-22 21:57:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:57:30,539 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-08-22 21:57:30,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 21:57:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-08-22 21:57:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 21:57:30,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:57:30,540 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:57:30,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-08-22 21:57:30,541 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:57:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:57:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1787944138, now seen corresponding path program 64 times [2020-08-22 21:57:30,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:57:30,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102714771] [2020-08-22 21:57:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:57:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:30,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:57:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:30,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:57:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:30,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:31,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:31,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:31,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:31,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:31,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:31,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:32,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:57:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:32,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:32,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:32,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 37 proven. 322 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-08-22 21:57:32,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102714771] [2020-08-22 21:57:32,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:57:32,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 21:57:32,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329031258] [2020-08-22 21:57:32,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 21:57:32,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:57:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 21:57:32,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 21:57:32,936 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 34 states. [2020-08-22 21:57:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:57:37,178 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-08-22 21:57:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 21:57:37,181 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-08-22 21:57:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:57:37,182 INFO L225 Difference]: With dead ends: 101 [2020-08-22 21:57:37,182 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 21:57:37,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=324, Invalid=3336, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 21:57:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 21:57:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-08-22 21:57:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 21:57:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2020-08-22 21:57:37,204 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 136 [2020-08-22 21:57:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:57:37,204 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2020-08-22 21:57:37,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 21:57:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2020-08-22 21:57:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 21:57:37,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:57:37,205 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:57:37,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-08-22 21:57:37,205 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:57:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:57:37,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1235115009, now seen corresponding path program 65 times [2020-08-22 21:57:37,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:57:37,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227695800] [2020-08-22 21:57:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:57:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:37,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:57:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:37,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:57:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:37,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:37,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 21:57:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:37,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:37,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:37,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:38,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:38,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:38,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:38,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:38,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:39,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:39,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 32 proven. 377 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-08-22 21:57:39,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227695800] [2020-08-22 21:57:39,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:57:39,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 21:57:39,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476564339] [2020-08-22 21:57:39,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 21:57:39,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:57:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 21:57:39,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 21:57:39,669 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand 38 states. [2020-08-22 21:57:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:57:45,646 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-08-22 21:57:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 21:57:45,649 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2020-08-22 21:57:45,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:57:45,650 INFO L225 Difference]: With dead ends: 106 [2020-08-22 21:57:45,651 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 21:57:45,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=442, Invalid=4960, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 21:57:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 21:57:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 21:57:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 21:57:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-22 21:57:45,680 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 146 [2020-08-22 21:57:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:57:45,680 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-22 21:57:45,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 21:57:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-22 21:57:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 21:57:45,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:57:45,681 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:57:45,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-08-22 21:57:45,682 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:57:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:57:45,682 INFO L82 PathProgramCache]: Analyzing trace with hash 931262870, now seen corresponding path program 66 times [2020-08-22 21:57:45,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:57:45,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874174097] [2020-08-22 21:57:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:57:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:45,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:57:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:45,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:57:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:45,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:46,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:46,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 21:57:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:46,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:46,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:46,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:47,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:47,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:47,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:47,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:48,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:48,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 54 proven. 438 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-08-22 21:57:49,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874174097] [2020-08-22 21:57:49,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:57:49,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 21:57:49,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143072489] [2020-08-22 21:57:49,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 21:57:49,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:57:49,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 21:57:49,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 21:57:49,005 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 38 states. [2020-08-22 21:57:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:57:55,666 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-08-22 21:57:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 21:57:55,669 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-08-22 21:57:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:57:55,670 INFO L225 Difference]: With dead ends: 110 [2020-08-22 21:57:55,671 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 21:57:55,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=411, Invalid=4991, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 21:57:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 21:57:55,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-08-22 21:57:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 21:57:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-22 21:57:55,698 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 156 [2020-08-22 21:57:55,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:57:55,698 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-22 21:57:55,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 21:57:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-22 21:57:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 21:57:55,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:57:55,699 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:57:55,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-08-22 21:57:55,700 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:57:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:57:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1108866399, now seen corresponding path program 67 times [2020-08-22 21:57:55,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:57:55,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870816505] [2020-08-22 21:57:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:57:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:55,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:57:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:55,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:57:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:55,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:56,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:56,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:56,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 21:57:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:56,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:56,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:56,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:57,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:57,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:57,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:57,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:58,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:58,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:58,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:57:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:57:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 58 proven. 508 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-08-22 21:57:58,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870816505] [2020-08-22 21:57:58,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:57:58,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 21:57:58,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442520806] [2020-08-22 21:57:58,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 21:57:58,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:57:58,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 21:57:58,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 21:57:58,809 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 40 states. [2020-08-22 21:58:06,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:58:06,732 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-08-22 21:58:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 21:58:06,736 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-08-22 21:58:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:58:06,737 INFO L225 Difference]: With dead ends: 110 [2020-08-22 21:58:06,738 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 21:58:06,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=420, Invalid=5280, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 21:58:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 21:58:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-08-22 21:58:06,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 21:58:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-22 21:58:06,759 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 166 [2020-08-22 21:58:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:58:06,759 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-22 21:58:06,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 21:58:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-22 21:58:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 21:58:06,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:58:06,760 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:58:06,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-08-22 21:58:06,760 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:58:06,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:58:06,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1651017226, now seen corresponding path program 68 times [2020-08-22 21:58:06,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:58:06,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947834470] [2020-08-22 21:58:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:58:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:06,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:58:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:06,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:58:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:07,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:07,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:07,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:07,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:07,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:58:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:08,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:08,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:08,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:08,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:09,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:09,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:09,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:09,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:10,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:10,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 62 proven. 583 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-08-22 21:58:10,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947834470] [2020-08-22 21:58:10,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:58:10,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 21:58:10,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141779479] [2020-08-22 21:58:10,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 21:58:10,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:58:10,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 21:58:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 21:58:10,803 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 42 states. [2020-08-22 21:58:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:58:19,115 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-08-22 21:58:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 21:58:19,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-08-22 21:58:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:58:19,120 INFO L225 Difference]: With dead ends: 110 [2020-08-22 21:58:19,120 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 21:58:19,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=429, Invalid=5577, Unknown=0, NotChecked=0, Total=6006 [2020-08-22 21:58:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 21:58:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-08-22 21:58:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 21:58:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-22 21:58:19,140 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 176 [2020-08-22 21:58:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:58:19,140 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-22 21:58:19,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 21:58:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-22 21:58:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 21:58:19,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:58:19,141 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:58:19,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-08-22 21:58:19,142 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:58:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:58:19,142 INFO L82 PathProgramCache]: Analyzing trace with hash 131600705, now seen corresponding path program 69 times [2020-08-22 21:58:19,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:58:19,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202563783] [2020-08-22 21:58:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:58:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:19,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:58:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:19,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:58:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:19,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:19,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:19,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:19,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:20,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:20,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:58:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:20,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:20,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:21,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:21,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:21,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:21,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:22,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:22,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:22,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 66 proven. 663 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-08-22 21:58:23,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202563783] [2020-08-22 21:58:23,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:58:23,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 21:58:23,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163353409] [2020-08-22 21:58:23,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 21:58:23,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:58:23,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 21:58:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 21:58:23,133 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 44 states. [2020-08-22 21:58:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:58:32,064 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-08-22 21:58:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 21:58:32,067 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-08-22 21:58:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:58:32,069 INFO L225 Difference]: With dead ends: 110 [2020-08-22 21:58:32,069 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 21:58:32,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=438, Invalid=5882, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 21:58:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 21:58:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-08-22 21:58:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 21:58:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-22 21:58:32,099 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 186 [2020-08-22 21:58:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:58:32,099 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-22 21:58:32,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 21:58:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-22 21:58:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-08-22 21:58:32,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:58:32,100 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:58:32,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-08-22 21:58:32,101 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:58:32,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:58:32,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1056320086, now seen corresponding path program 70 times [2020-08-22 21:58:32,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:58:32,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779545998] [2020-08-22 21:58:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:58:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:32,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:58:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:32,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:58:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:32,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:32,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:32,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:32,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:32,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:33,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:33,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:58:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:33,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:34,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:34,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:34,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:34,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:35,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:35,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:35,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:36,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:36,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 70 proven. 748 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-08-22 21:58:37,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779545998] [2020-08-22 21:58:37,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:58:37,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 21:58:37,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372812364] [2020-08-22 21:58:37,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 21:58:37,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:58:37,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 21:58:37,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 21:58:37,038 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 46 states. [2020-08-22 21:58:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:58:48,602 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-08-22 21:58:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 21:58:48,607 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 196 [2020-08-22 21:58:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:58:48,608 INFO L225 Difference]: With dead ends: 110 [2020-08-22 21:58:48,609 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 21:58:48,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=447, Invalid=6195, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 21:58:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 21:58:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-08-22 21:58:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 21:58:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-22 21:58:48,630 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 196 [2020-08-22 21:58:48,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:58:48,630 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-22 21:58:48,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 21:58:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-22 21:58:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-22 21:58:48,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:58:48,631 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:58:48,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-08-22 21:58:48,631 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:58:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:58:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1609535519, now seen corresponding path program 71 times [2020-08-22 21:58:48,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:58:48,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199484609] [2020-08-22 21:58:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:58:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:48,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:58:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:48,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:58:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:48,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:49,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:49,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:49,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:49,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:49,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:50,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:50,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:58:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:50,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:50,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:51,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:51,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:51,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:51,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:52,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:52,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:52,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:53,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:58:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:58:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 74 proven. 838 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-22 21:58:53,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199484609] [2020-08-22 21:58:53,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:58:53,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 21:58:53,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858978059] [2020-08-22 21:58:53,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 21:58:53,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:58:53,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 21:58:53,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2134, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 21:58:53,656 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 48 states. [2020-08-22 21:59:05,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:59:05,087 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2020-08-22 21:59:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 21:59:05,091 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 206 [2020-08-22 21:59:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:59:05,093 INFO L225 Difference]: With dead ends: 106 [2020-08-22 21:59:05,093 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 21:59:05,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=456, Invalid=6516, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 21:59:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 21:59:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-08-22 21:59:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 21:59:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-08-22 21:59:05,113 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 206 [2020-08-22 21:59:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:59:05,113 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-08-22 21:59:05,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 21:59:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-08-22 21:59:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 21:59:05,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:59:05,114 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:59:05,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-08-22 21:59:05,115 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:59:05,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:59:05,115 INFO L82 PathProgramCache]: Analyzing trace with hash -477577610, now seen corresponding path program 72 times [2020-08-22 21:59:05,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:59:05,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247978106] [2020-08-22 21:59:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:59:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:05,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:59:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:05,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:59:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:05,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:05,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:05,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:05,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:05,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:06,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:06,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:06,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:07,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 21:59:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:07,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:07,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:07,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:08,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:08,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:08,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 56 proven. 589 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-08-22 21:59:09,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247978106] [2020-08-22 21:59:09,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:59:09,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 21:59:09,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450900376] [2020-08-22 21:59:09,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 21:59:09,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:59:09,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 21:59:09,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 21:59:09,021 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 42 states. [2020-08-22 21:59:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:59:17,120 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2020-08-22 21:59:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:59:17,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-08-22 21:59:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:59:17,125 INFO L225 Difference]: With dead ends: 106 [2020-08-22 21:59:17,125 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 21:59:17,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=383, Invalid=4729, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 21:59:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 21:59:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 21:59:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 21:59:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2020-08-22 21:59:17,143 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 176 [2020-08-22 21:59:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:59:17,143 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2020-08-22 21:59:17,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 21:59:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2020-08-22 21:59:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 21:59:17,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:59:17,144 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:59:17,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-08-22 21:59:17,144 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:59:17,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:59:17,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2130045323, now seen corresponding path program 73 times [2020-08-22 21:59:17,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:59:17,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216402511] [2020-08-22 21:59:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:59:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:17,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:59:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:17,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:59:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:17,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:17,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:17,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:18,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:18,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:18,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:18,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:19,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:19,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 21:59:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:19,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:19,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:20,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:20,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:20,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:21,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:21,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 61 proven. 668 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-08-22 21:59:21,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216402511] [2020-08-22 21:59:21,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:59:21,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 21:59:21,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248647096] [2020-08-22 21:59:21,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 21:59:21,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:59:21,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 21:59:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 21:59:21,788 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand 44 states. [2020-08-22 21:59:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:59:32,524 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2020-08-22 21:59:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:59:32,528 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-08-22 21:59:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:59:32,529 INFO L225 Difference]: With dead ends: 106 [2020-08-22 21:59:32,530 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 21:59:32,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=392, Invalid=5010, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 21:59:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 21:59:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 21:59:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 21:59:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-08-22 21:59:32,552 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 186 [2020-08-22 21:59:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:59:32,552 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-08-22 21:59:32,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 21:59:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2020-08-22 21:59:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 21:59:32,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:59:32,553 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:59:32,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-08-22 21:59:32,554 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:59:32,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:59:32,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2107579957, now seen corresponding path program 74 times [2020-08-22 21:59:32,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:59:32,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190221552] [2020-08-22 21:59:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:59:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:32,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:59:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:32,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:59:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:32,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:33,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:33,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:33,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:33,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:33,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:33,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:34,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:34,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 21:59:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:35,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:35,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:36,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 41 proven. 382 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 21:59:36,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190221552] [2020-08-22 21:59:36,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:59:36,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 21:59:36,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102956029] [2020-08-22 21:59:36,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 21:59:36,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:59:36,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 21:59:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 21:59:36,269 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 36 states. [2020-08-22 21:59:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:59:45,000 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2020-08-22 21:59:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 21:59:45,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-08-22 21:59:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:59:45,005 INFO L225 Difference]: With dead ends: 106 [2020-08-22 21:59:45,005 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 21:59:45,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=356, Invalid=3934, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 21:59:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 21:59:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 21:59:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 21:59:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2020-08-22 21:59:45,029 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 146 [2020-08-22 21:59:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:59:45,029 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-08-22 21:59:45,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 21:59:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2020-08-22 21:59:45,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-22 21:59:45,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:59:45,031 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:59:45,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-08-22 21:59:45,031 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:59:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:59:45,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1802303125, now seen corresponding path program 75 times [2020-08-22 21:59:45,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:59:45,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842789746] [2020-08-22 21:59:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:59:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:59:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:45,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:59:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:45,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:45,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:45,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:45,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:46,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:46,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:46,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:47,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:47,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 21:59:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:47,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:48,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:48,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:49,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:49,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:49,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:50,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:50,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:51,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 21:59:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:59:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 73 proven. 839 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-22 21:59:51,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842789746] [2020-08-22 21:59:51,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:59:51,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 21:59:51,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582611383] [2020-08-22 21:59:51,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 21:59:51,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:59:51,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 21:59:51,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2134, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 21:59:51,728 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand 48 states. [2020-08-22 21:59:56,316 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 21:59:58,804 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:00:02,701 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:00:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:00:07,283 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2020-08-22 22:00:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 22:00:07,289 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 206 [2020-08-22 22:00:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:00:07,291 INFO L225 Difference]: With dead ends: 106 [2020-08-22 22:00:07,291 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:00:07,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=433, Invalid=6047, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 22:00:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:00:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 22:00:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 22:00:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2020-08-22 22:00:07,323 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 206 [2020-08-22 22:00:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:00:07,324 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2020-08-22 22:00:07,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 22:00:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2020-08-22 22:00:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-08-22 22:00:07,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:00:07,325 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:00:07,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-08-22 22:00:07,325 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:00:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:00:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1493433674, now seen corresponding path program 76 times [2020-08-22 22:00:07,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:00:07,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573417040] [2020-08-22 22:00:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:00:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:07,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:00:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:07,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:00:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:07,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:07,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:08,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:08,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:08,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:08,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:09,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:09,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:10,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 22:00:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:10,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:10,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:11,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:11,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:12,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:12,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:13,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:13,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:14,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:15,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 78 proven. 933 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2020-08-22 22:00:15,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573417040] [2020-08-22 22:00:15,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:00:15,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 22:00:15,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098559596] [2020-08-22 22:00:15,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 22:00:15,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:00:15,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 22:00:15,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2323, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 22:00:15,688 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand 50 states. [2020-08-22 22:00:19,366 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-08-22 22:00:20,804 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:00:22,146 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:00:26,113 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:00:27,491 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:00:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:00:33,955 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-08-22 22:00:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 22:00:33,962 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 216 [2020-08-22 22:00:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:00:33,963 INFO L225 Difference]: With dead ends: 106 [2020-08-22 22:00:33,963 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:00:33,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=465, Invalid=6845, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 22:00:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:00:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 22:00:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 22:00:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2020-08-22 22:00:33,981 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 216 [2020-08-22 22:00:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:00:33,981 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2020-08-22 22:00:33,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 22:00:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2020-08-22 22:00:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 22:00:33,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:00:33,982 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:00:33,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-08-22 22:00:33,982 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:00:33,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:00:33,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2053962219, now seen corresponding path program 77 times [2020-08-22 22:00:33,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:00:33,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288161826] [2020-08-22 22:00:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:00:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:34,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:00:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:34,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:00:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:34,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:34,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:34,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:35,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:35,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:35,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:35,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:36,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:36,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 22:00:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:37,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 2 proven. 272 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-08-22 22:00:37,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288161826] [2020-08-22 22:00:37,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:00:37,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 22:00:37,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850460278] [2020-08-22 22:00:37,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 22:00:37,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:00:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 22:00:37,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:00:37,431 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand 32 states. [2020-08-22 22:00:39,151 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-08-22 22:00:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:00:45,885 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2020-08-22 22:00:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 22:00:45,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-08-22 22:00:45,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:00:45,891 INFO L225 Difference]: With dead ends: 106 [2020-08-22 22:00:45,891 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:00:45,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=341, Invalid=3565, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 22:00:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:00:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 22:00:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 22:00:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-08-22 22:00:45,909 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 126 [2020-08-22 22:00:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:00:45,909 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-08-22 22:00:45,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 22:00:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-08-22 22:00:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 22:00:45,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:00:45,911 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:00:45,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-08-22 22:00:45,911 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:00:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:00:45,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1594196054, now seen corresponding path program 78 times [2020-08-22 22:00:45,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:00:45,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953738697] [2020-08-22 22:00:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:00:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:46,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:00:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:46,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:00:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:46,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:46,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:46,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:46,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:46,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:47,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:47,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:47,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:48,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 22:00:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:48,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:48,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:49,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:49,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:00:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:00:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 46 proven. 446 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-08-22 22:00:49,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953738697] [2020-08-22 22:00:49,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:00:49,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 22:00:49,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339322344] [2020-08-22 22:00:49,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 22:00:49,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:00:49,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 22:00:49,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 22:00:49,745 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 38 states. [2020-08-22 22:00:52,751 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:00:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:00:59,909 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2020-08-22 22:00:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 22:00:59,916 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-08-22 22:00:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:00:59,918 INFO L225 Difference]: With dead ends: 106 [2020-08-22 22:00:59,918 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:00:59,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=365, Invalid=4191, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 22:00:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:00:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 22:00:59,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 22:00:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2020-08-22 22:00:59,961 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 156 [2020-08-22 22:00:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:00:59,961 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2020-08-22 22:00:59,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 22:00:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2020-08-22 22:00:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 22:00:59,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:00:59,964 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:00:59,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-08-22 22:00:59,964 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:00:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:00:59,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1545853494, now seen corresponding path program 79 times [2020-08-22 22:00:59,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:00:59,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270503631] [2020-08-22 22:00:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:00:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:00,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:01:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:00,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:01:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:00,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:00,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:00,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:01,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:01,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:01,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:02,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:02,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:03,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 22:01:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:03,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:03,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 36 proven. 323 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-08-22 22:01:03,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270503631] [2020-08-22 22:01:03,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:01:03,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 22:01:03,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571416444] [2020-08-22 22:01:03,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 22:01:03,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:01:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 22:01:03,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 22:01:03,864 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand 34 states. [2020-08-22 22:01:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:01:11,883 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2020-08-22 22:01:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 22:01:11,888 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-08-22 22:01:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:01:11,890 INFO L225 Difference]: With dead ends: 106 [2020-08-22 22:01:11,890 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:01:11,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=347, Invalid=3685, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 22:01:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:01:11,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 22:01:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 22:01:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-08-22 22:01:11,907 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 136 [2020-08-22 22:01:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:01:11,907 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-08-22 22:01:11,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 22:01:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-08-22 22:01:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 22:01:11,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:01:11,908 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:01:11,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-08-22 22:01:11,908 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:01:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:01:11,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1926181291, now seen corresponding path program 80 times [2020-08-22 22:01:11,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:01:11,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031158596] [2020-08-22 22:01:11,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:01:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:12,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:01:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:12,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:01:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:12,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:12,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:12,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:12,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:13,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:13,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:13,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:14,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 22:01:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:14,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:15,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:15,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:15,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:16,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 51 proven. 515 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-08-22 22:01:16,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031158596] [2020-08-22 22:01:16,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:01:16,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 22:01:16,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140167666] [2020-08-22 22:01:16,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 22:01:16,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:01:16,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 22:01:16,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 22:01:16,636 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 40 states. [2020-08-22 22:01:20,292 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:01:21,309 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:01:27,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:01:27,173 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-08-22 22:01:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 22:01:27,174 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-08-22 22:01:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:01:27,175 INFO L225 Difference]: With dead ends: 106 [2020-08-22 22:01:27,175 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:01:27,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=374, Invalid=4456, Unknown=0, NotChecked=0, Total=4830 [2020-08-22 22:01:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:01:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-08-22 22:01:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 22:01:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-08-22 22:01:27,193 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 166 [2020-08-22 22:01:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:01:27,193 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-08-22 22:01:27,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 22:01:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-08-22 22:01:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-08-22 22:01:27,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:01:27,194 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:01:27,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-08-22 22:01:27,194 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:01:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:01:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1850764138, now seen corresponding path program 81 times [2020-08-22 22:01:27,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:01:27,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329449972] [2020-08-22 22:01:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:01:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:27,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:01:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:27,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:01:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:27,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:27,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:27,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:28,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:28,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:28,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:28,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 22:01:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:29,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 66 proven. 710 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2020-08-22 22:01:30,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329449972] [2020-08-22 22:01:30,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:01:30,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 22:01:30,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278949763] [2020-08-22 22:01:30,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 22:01:30,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:01:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 22:01:30,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:01:30,108 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 29 states. [2020-08-22 22:01:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:01:37,575 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2020-08-22 22:01:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 22:01:37,581 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 196 [2020-08-22 22:01:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:01:37,582 INFO L225 Difference]: With dead ends: 106 [2020-08-22 22:01:37,582 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:01:37,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=324, Invalid=3098, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 22:01:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:01:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-08-22 22:01:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 22:01:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-08-22 22:01:37,601 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 196 [2020-08-22 22:01:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:01:37,601 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-08-22 22:01:37,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 22:01:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-08-22 22:01:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 22:01:37,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:01:37,602 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:01:37,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-08-22 22:01:37,603 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:01:37,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:01:37,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1658058538, now seen corresponding path program 82 times [2020-08-22 22:01:37,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:01:37,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004249556] [2020-08-22 22:01:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:01:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:37,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:01:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:37,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:01:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:38,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:38,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 22:01:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:38,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:38,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:39,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:39,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:39,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:39,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:40,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:40,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:41,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:41,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:41,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 35 proven. 441 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2020-08-22 22:01:42,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004249556] [2020-08-22 22:01:42,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:01:42,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 22:01:42,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802168186] [2020-08-22 22:01:42,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 22:01:42,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:01:42,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 22:01:42,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 22:01:42,432 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 40 states. [2020-08-22 22:01:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:01:55,888 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2020-08-22 22:01:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 22:01:55,893 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 156 [2020-08-22 22:01:55,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:01:55,894 INFO L225 Difference]: With dead ends: 111 [2020-08-22 22:01:55,894 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 22:01:55,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=477, Invalid=5685, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 22:01:55,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 22:01:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-08-22 22:01:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:01:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-08-22 22:01:55,922 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 156 [2020-08-22 22:01:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:01:55,922 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-08-22 22:01:55,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 22:01:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-08-22 22:01:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 22:01:55,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:01:55,923 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:01:55,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-08-22 22:01:55,924 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:01:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:01:55,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1871353813, now seen corresponding path program 83 times [2020-08-22 22:01:55,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:01:55,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126642475] [2020-08-22 22:01:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:01:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:56,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:01:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:56,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:01:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:56,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:56,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:57,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 22:01:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:57,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:57,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:57,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:58,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:58,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:58,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:59,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:01:59,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:01:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:00,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:00,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:01,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 59 proven. 507 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-08-22 22:02:01,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126642475] [2020-08-22 22:02:01,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:02:01,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 22:02:01,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351767123] [2020-08-22 22:02:01,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 22:02:01,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:02:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 22:02:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 22:02:01,747 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 40 states. [2020-08-22 22:02:03,789 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-08-22 22:02:04,435 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-08-22 22:02:05,035 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-08-22 22:02:05,350 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-08-22 22:02:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:02:17,100 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-08-22 22:02:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 22:02:17,108 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-08-22 22:02:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:02:17,110 INFO L225 Difference]: With dead ends: 115 [2020-08-22 22:02:17,110 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 22:02:17,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=443, Invalid=5719, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 22:02:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 22:02:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-08-22 22:02:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:02:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-08-22 22:02:17,137 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 166 [2020-08-22 22:02:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:02:17,137 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-08-22 22:02:17,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 22:02:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-08-22 22:02:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 22:02:17,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:02:17,139 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:02:17,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-08-22 22:02:17,139 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:02:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:02:17,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1968967818, now seen corresponding path program 84 times [2020-08-22 22:02:17,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:02:17,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437118623] [2020-08-22 22:02:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:02:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:17,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:02:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:17,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:02:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:17,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:17,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:18,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:18,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 22:02:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:18,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:19,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:19,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:20,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:20,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:21,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:21,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:22,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:22,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:23,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:23,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 63 proven. 582 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-08-22 22:02:24,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437118623] [2020-08-22 22:02:24,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:02:24,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 22:02:24,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689837234] [2020-08-22 22:02:24,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 22:02:24,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:02:24,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 22:02:24,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 22:02:24,254 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 42 states. [2020-08-22 22:02:26,013 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-08-22 22:02:26,542 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-08-22 22:02:28,881 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:02:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:02:41,199 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-08-22 22:02:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 22:02:41,208 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-08-22 22:02:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:02:41,210 INFO L225 Difference]: With dead ends: 115 [2020-08-22 22:02:41,210 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 22:02:41,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=452, Invalid=6028, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 22:02:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 22:02:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-08-22 22:02:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:02:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-08-22 22:02:41,248 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 176 [2020-08-22 22:02:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:02:41,248 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-08-22 22:02:41,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 22:02:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-08-22 22:02:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 22:02:41,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:02:41,250 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:02:41,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-08-22 22:02:41,250 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:02:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:02:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1963194507, now seen corresponding path program 85 times [2020-08-22 22:02:41,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:02:41,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290743309] [2020-08-22 22:02:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:02:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:41,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:02:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:41,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:02:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:41,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:41,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:42,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:42,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:43,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 22:02:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:43,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:43,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:44,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:44,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:45,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:45,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:46,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:46,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:47,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:48,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:48,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:02:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:02:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 67 proven. 662 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-08-22 22:02:49,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290743309] [2020-08-22 22:02:49,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:02:49,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 22:02:49,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178340515] [2020-08-22 22:02:49,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 22:02:49,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:02:49,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 22:02:49,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 22:02:49,211 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 44 states. [2020-08-22 22:02:51,132 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-08-22 22:02:51,717 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-08-22 22:02:52,468 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-08-22 22:02:53,200 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-08-22 22:02:53,564 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:02:54,110 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:02:54,855 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:02:55,201 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:02:55,636 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:02:56,362 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:02:56,708 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-08-22 22:03:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:03:09,513 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-08-22 22:03:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 22:03:09,521 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-08-22 22:03:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:03:09,522 INFO L225 Difference]: With dead ends: 115 [2020-08-22 22:03:09,523 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 22:03:09,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=461, Invalid=6345, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 22:03:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 22:03:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-08-22 22:03:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:03:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-08-22 22:03:09,547 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 186 [2020-08-22 22:03:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:03:09,548 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-08-22 22:03:09,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 22:03:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-08-22 22:03:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-08-22 22:03:09,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:03:09,549 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:03:09,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-08-22 22:03:09,549 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:03:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:03:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1816908266, now seen corresponding path program 86 times [2020-08-22 22:03:09,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:03:09,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037730785] [2020-08-22 22:03:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:03:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:09,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:03:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:09,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:03:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:10,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:10,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:10,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:10,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:11,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:11,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 22:03:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:12,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:13,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:13,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:14,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:14,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:15,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:16,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:16,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:17,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:18,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 71 proven. 747 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-08-22 22:03:18,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037730785] [2020-08-22 22:03:18,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:03:18,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 22:03:18,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159531] [2020-08-22 22:03:18,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 22:03:18,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:03:18,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 22:03:18,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 22:03:18,749 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 46 states. [2020-08-22 22:03:21,531 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-08-22 22:03:22,519 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-08-22 22:03:23,189 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-08-22 22:03:23,571 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:03:24,383 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:03:25,054 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:03:25,423 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:03:26,089 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:03:26,724 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:03:27,095 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:03:27,767 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:03:28,415 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:03:28,812 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-08-22 22:03:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:03:42,447 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-08-22 22:03:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 22:03:42,456 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 196 [2020-08-22 22:03:42,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:03:42,457 INFO L225 Difference]: With dead ends: 115 [2020-08-22 22:03:42,457 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 22:03:42,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=470, Invalid=6670, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 22:03:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 22:03:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-08-22 22:03:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:03:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-08-22 22:03:42,492 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 196 [2020-08-22 22:03:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:03:42,492 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-08-22 22:03:42,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 22:03:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-08-22 22:03:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-22 22:03:42,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:03:42,494 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:03:42,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-08-22 22:03:42,494 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:03:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:03:42,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1987464981, now seen corresponding path program 87 times [2020-08-22 22:03:42,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:03:42,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006681251] [2020-08-22 22:03:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:03:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:42,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:03:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:42,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:03:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:43,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:43,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:43,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:43,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:44,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:44,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:45,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 22:03:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:45,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:46,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:46,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:47,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:47,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:49,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:49,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:50,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:51,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:51,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:03:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:03:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 75 proven. 837 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-22 22:03:52,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006681251] [2020-08-22 22:03:52,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:03:52,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 22:03:52,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772210687] [2020-08-22 22:03:52,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 22:03:52,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:03:52,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 22:03:52,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2134, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 22:03:52,470 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 48 states. [2020-08-22 22:03:55,288 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-08-22 22:03:55,656 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-08-22 22:03:56,306 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-08-22 22:03:57,011 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-08-22 22:03:57,412 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:03:58,180 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:04:00,112 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:00,449 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:04:01,592 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:02,855 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:04:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:04:11,761 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-08-22 22:04:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 22:04:11,768 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 206 [2020-08-22 22:04:11,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:04:11,770 INFO L225 Difference]: With dead ends: 115 [2020-08-22 22:04:11,770 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 22:04:11,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=479, Invalid=7003, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 22:04:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 22:04:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-08-22 22:04:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:04:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-08-22 22:04:11,794 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 206 [2020-08-22 22:04:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:04:11,795 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-08-22 22:04:11,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 22:04:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-08-22 22:04:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-08-22 22:04:11,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:04:11,796 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:04:11,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-08-22 22:04:11,796 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:04:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:04:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1316930742, now seen corresponding path program 88 times [2020-08-22 22:04:11,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:04:11,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586384433] [2020-08-22 22:04:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:04:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:12,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:04:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:12,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:04:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:12,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:12,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:12,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:12,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:13,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:13,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:13,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:14,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 22:04:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:14,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:15,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:15,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:15,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:16,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:16,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:17,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:18,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:18,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:19,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:19,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 79 proven. 932 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2020-08-22 22:04:20,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586384433] [2020-08-22 22:04:20,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:04:20,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 22:04:20,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454613843] [2020-08-22 22:04:20,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 22:04:20,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:04:20,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 22:04:20,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2323, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 22:04:20,356 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 50 states. [2020-08-22 22:04:25,448 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:26,804 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:28,171 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:29,524 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:30,922 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:04:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:04:39,465 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-08-22 22:04:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 22:04:39,472 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 216 [2020-08-22 22:04:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:04:39,474 INFO L225 Difference]: With dead ends: 115 [2020-08-22 22:04:39,474 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 22:04:39,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=488, Invalid=7344, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 22:04:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 22:04:39,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-08-22 22:04:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:04:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-08-22 22:04:39,498 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 216 [2020-08-22 22:04:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:04:39,498 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-08-22 22:04:39,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 22:04:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-08-22 22:04:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-08-22 22:04:39,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:04:39,500 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 19, 19, 19, 19, 19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:04:39,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-08-22 22:04:39,500 INFO L427 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:04:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:04:39,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1004835147, now seen corresponding path program 89 times [2020-08-22 22:04:39,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:04:39,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907723844] [2020-08-22 22:04:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:04:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:39,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:04:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:39,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:04:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:40,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:40,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:40,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:40,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:40,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:41,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:41,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:42,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:42,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 22:04:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:43,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:43,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:44,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:44,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:45,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:45,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:46,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:46,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:47,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:48,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:04:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:04:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 83 proven. 1032 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2020-08-22 22:04:48,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907723844] [2020-08-22 22:04:48,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:04:48,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 22:04:48,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961170531] [2020-08-22 22:04:48,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 22:04:48,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:04:48,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 22:04:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 22:04:48,765 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 52 states. [2020-08-22 22:04:51,185 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-08-22 22:04:52,025 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-08-22 22:04:52,626 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-08-22 22:04:54,141 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:55,016 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:04:55,616 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:55,947 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:04:56,491 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:04:57,060 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:58,481 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:04:59,352 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:04:59,966 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:05:00,835 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:05:01,410 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:05:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:08,765 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2020-08-22 22:05:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 22:05:08,773 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 226 [2020-08-22 22:05:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:08,774 INFO L225 Difference]: With dead ends: 111 [2020-08-22 22:05:08,774 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 22:05:08,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=497, Invalid=7693, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 22:05:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 22:05:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2020-08-22 22:05:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 22:05:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2020-08-22 22:05:08,794 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 226 [2020-08-22 22:05:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:08,794 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2020-08-22 22:05:08,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 22:05:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2020-08-22 22:05:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 22:05:08,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:08,795 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:05:08,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-08-22 22:05:08,795 INFO L427 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:08,795 INFO L82 PathProgramCache]: Analyzing trace with hash 980917921, now seen corresponding path program 90 times [2020-08-22 22:05:08,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:08,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320893493] [2020-08-22 22:05:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:05:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:10,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:10,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:10,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:11,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:11,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:12,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 22:05:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:12,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:13,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:13,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:14,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 50 proven. 516 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-08-22 22:05:14,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320893493] [2020-08-22 22:05:14,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:05:14,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 22:05:14,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90822308] [2020-08-22 22:05:14,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 22:05:14,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 22:05:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 22:05:14,305 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand 40 states. [2020-08-22 22:05:16,113 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-08-22 22:05:17,241 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-08-22 22:05:18,034 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:05:18,498 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:05:18,767 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:05:19,681 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:05:28,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:28,318 INFO L93 Difference]: Finished difference Result 111 states and 146 transitions. [2020-08-22 22:05:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 22:05:28,326 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-08-22 22:05:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:28,327 INFO L225 Difference]: With dead ends: 111 [2020-08-22 22:05:28,328 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 22:05:28,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=397, Invalid=4859, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 22:05:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 22:05:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-08-22 22:05:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:05:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2020-08-22 22:05:28,347 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 166 [2020-08-22 22:05:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:28,347 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2020-08-22 22:05:28,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 22:05:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2020-08-22 22:05:28,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 22:05:28,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:28,348 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:05:28,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-08-22 22:05:28,349 INFO L427 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:28,349 INFO L82 PathProgramCache]: Analyzing trace with hash 797952321, now seen corresponding path program 91 times [2020-08-22 22:05:28,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:28,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702394118] [2020-08-22 22:05:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:28,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:28,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:05:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:28,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:28,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:29,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:29,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:29,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:29,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:30,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:30,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:31,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:31,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 22:05:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:32,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:32,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:33,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:33,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:34,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:34,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 60 proven. 669 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-08-22 22:05:35,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702394118] [2020-08-22 22:05:35,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:05:35,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 22:05:35,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371306123] [2020-08-22 22:05:35,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 22:05:35,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:35,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 22:05:35,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 22:05:35,204 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 44 states. [2020-08-22 22:05:37,330 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-08-22 22:05:38,534 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-08-22 22:05:39,944 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:05:41,176 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:05:42,389 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:05:43,671 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:05:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:50,268 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2020-08-22 22:05:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 22:05:50,275 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-08-22 22:05:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:50,276 INFO L225 Difference]: With dead ends: 111 [2020-08-22 22:05:50,276 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 22:05:50,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=415, Invalid=5437, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 22:05:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 22:05:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-08-22 22:05:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:05:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2020-08-22 22:05:50,299 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 186 [2020-08-22 22:05:50,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:50,300 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2020-08-22 22:05:50,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 22:05:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2020-08-22 22:05:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-08-22 22:05:50,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:50,301 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:05:50,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-08-22 22:05:50,302 INFO L427 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:50,302 INFO L82 PathProgramCache]: Analyzing trace with hash 113467126, now seen corresponding path program 92 times [2020-08-22 22:05:50,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:50,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180853118] [2020-08-22 22:05:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:50,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:50,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:05:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:50,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:50,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:51,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:51,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:51,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:51,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:52,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:52,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:53,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 22:05:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:05:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 75 proven. 889 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2020-08-22 22:05:54,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180853118] [2020-08-22 22:05:54,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:05:54,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 22:05:54,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141449271] [2020-08-22 22:05:54,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 22:05:54,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 22:05:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:05:54,393 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand 31 states. [2020-08-22 22:06:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:06:06,314 INFO L93 Difference]: Finished difference Result 111 states and 144 transitions. [2020-08-22 22:06:06,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 22:06:06,322 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 216 [2020-08-22 22:06:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:06:06,323 INFO L225 Difference]: With dead ends: 111 [2020-08-22 22:06:06,324 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 22:06:06,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=356, Invalid=3676, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 22:06:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 22:06:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-08-22 22:06:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:06:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-08-22 22:06:06,344 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 216 [2020-08-22 22:06:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:06:06,344 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-08-22 22:06:06,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 22:06:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-08-22 22:06:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-08-22 22:06:06,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:06:06,345 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 19, 19, 19, 19, 19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:06:06,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-08-22 22:06:06,345 INFO L427 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:06:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:06:06,346 INFO L82 PathProgramCache]: Analyzing trace with hash -458021247, now seen corresponding path program 93 times [2020-08-22 22:06:06,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:06:06,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676821518] [2020-08-22 22:06:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:06:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:06,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:06:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:06,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:06:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:06,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:07,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:07,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:07,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:07,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:08,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:08,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:08,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:09,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:10,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 22:06:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:10,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:11,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:11,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:12,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:13,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:14,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:14,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:15,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:16,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:16,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 82 proven. 1033 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2020-08-22 22:06:17,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676821518] [2020-08-22 22:06:17,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:06:17,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 22:06:17,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398622670] [2020-08-22 22:06:17,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 22:06:17,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:06:17,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 22:06:17,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 22:06:17,426 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 52 states. [2020-08-22 22:06:20,140 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-08-22 22:06:21,840 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-08-22 22:06:22,348 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:06:23,328 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:06:24,150 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:06:24,522 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:06:25,795 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:06:26,167 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:06:26,859 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:06:27,543 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:06:29,171 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:06:29,578 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:06:30,935 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:06:32,608 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-08-22 22:06:33,006 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:06:33,693 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-08-22 22:06:34,520 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-08-22 22:06:41,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:06:41,443 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2020-08-22 22:06:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 22:06:41,456 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 226 [2020-08-22 22:06:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:06:41,457 INFO L225 Difference]: With dead ends: 111 [2020-08-22 22:06:41,457 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 22:06:41,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=474, Invalid=7182, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 22:06:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 22:06:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-08-22 22:06:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 22:06:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2020-08-22 22:06:41,495 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 226 [2020-08-22 22:06:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:06:41,495 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2020-08-22 22:06:41,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 22:06:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2020-08-22 22:06:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 22:06:41,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:06:41,496 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:06:41,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-08-22 22:06:41,496 INFO L427 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:06:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:06:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1504562177, now seen corresponding path program 94 times [2020-08-22 22:06:41,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:06:41,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389502195] [2020-08-22 22:06:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:06:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:41,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:06:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:41,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:06:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:42,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:42,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:42,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:42,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:43,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:43,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:44,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:44,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:46,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:46,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 22:06:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:47,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:48,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-22 22:06:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:06:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 40 proven. 383 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 22:06:48,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389502195] [2020-08-22 22:06:48,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:06:48,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 22:06:48,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373335265] [2020-08-22 22:06:48,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 22:06:48,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:06:48,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 22:06:48,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 22:06:48,380 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand 36 states. [2020-08-22 22:06:50,277 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-08-22 22:06:50,857 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-08-22 22:06:51,185 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-08-22 22:06:51,613 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-08-22 22:06:52,376 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-08-22 22:06:52,744 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23