/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/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:10:21,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:10:21,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:10:21,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:10:21,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:10:21,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:10:21,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:10:21,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:10:21,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:10:21,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:10:21,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:10:21,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:10:21,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:10:21,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:10:21,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:10:21,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:10:21,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:10:21,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:10:21,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:10:21,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:10:21,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:10:21,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:10:21,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:10:21,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:10:21,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:10:21,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:10:21,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:10:21,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:10:21,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:10:21,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:10:21,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:10:21,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:10:21,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:10:21,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:10:21,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:10:21,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:10:21,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:10:21,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:10:21,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:10:21,618 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:10:21,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:10:21,618 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:10:21,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:10:21,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:10:21,619 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:10:21,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:10:21,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:10:21,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:10:21,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:10:21,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:10:21,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:10:21,621 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 [2020-09-04 23:10:22,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:10:22,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:10:22,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:10:22,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:10:22,120 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:10:22,122 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-09-04 23:10:22,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e9b63b5f/8486d75447fe461fb4f0c23d8dfbddc9/FLAG179ea71b2 [2020-09-04 23:10:22,761 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:10:22,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-2.c [2020-09-04 23:10:22,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e9b63b5f/8486d75447fe461fb4f0c23d8dfbddc9/FLAG179ea71b2 [2020-09-04 23:10:23,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e9b63b5f/8486d75447fe461fb4f0c23d8dfbddc9 [2020-09-04 23:10:23,104 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:10:23,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:10:23,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:23,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:10:23,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:10:23,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:23" (1/1) ... [2020-09-04 23:10:23,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18725080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23, skipping insertion in model container [2020-09-04 23:10:23,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:23" (1/1) ... [2020-09-04 23:10:23,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:10:23,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:10:23,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:23,428 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:10:23,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:23,588 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:10:23,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23 WrapperNode [2020-09-04 23:10:23,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:23,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:10:23,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:10:23,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:10:23,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23" (1/1) ... [2020-09-04 23:10:23,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23" (1/1) ... [2020-09-04 23:10:23,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23" (1/1) ... [2020-09-04 23:10:23,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23" (1/1) ... [2020-09-04 23:10:23,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23" (1/1) ... [2020-09-04 23:10:23,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23" (1/1) ... [2020-09-04 23:10:23,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23" (1/1) ... [2020-09-04 23:10:23,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:10:23,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:10:23,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:10:23,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:10:23,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:10:23,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:10:23,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:10:23,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:10:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:10:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:10:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:10:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:10:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:10:23,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:10:23,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-09-04 23:10:23,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:10:23,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:10:23,995 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:10:23,996 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 23:10:24,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:24 BoogieIcfgContainer [2020-09-04 23:10:24,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:10:24,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:10:24,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:10:24,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:10:24,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:10:23" (1/3) ... [2020-09-04 23:10:24,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bda2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:24, skipping insertion in model container [2020-09-04 23:10:24,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:23" (2/3) ... [2020-09-04 23:10:24,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bda2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:24, skipping insertion in model container [2020-09-04 23:10:24,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:24" (3/3) ... [2020-09-04 23:10:24,015 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-09-04 23:10:24,029 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:10:24,041 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:10:24,067 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:10:24,099 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:10:24,100 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:10:24,100 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:10:24,100 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:10:24,100 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:10:24,101 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:10:24,101 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:10:24,101 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:10:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-09-04 23:10:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 23:10:24,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:24,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:24,137 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:24,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:24,145 INFO L82 PathProgramCache]: Analyzing trace with hash 245897808, now seen corresponding path program 1 times [2020-09-04 23:10:24,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:24,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010233107] [2020-09-04 23:10:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:24,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:24,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010233107] [2020-09-04 23:10:24,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:24,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:10:24,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199703303] [2020-09-04 23:10:24,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:10:24,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:10:24,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:10:24,447 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-09-04 23:10:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:24,613 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-09-04 23:10:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:10:24,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-04 23:10:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:24,629 INFO L225 Difference]: With dead ends: 98 [2020-09-04 23:10:24,630 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 23:10:24,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:10:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 23:10:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-09-04 23:10:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 23:10:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-04 23:10:24,688 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 20 [2020-09-04 23:10:24,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:24,689 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-04 23:10:24,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:10:24,689 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-04 23:10:24,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 23:10:24,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:24,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:24,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:10:24,691 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash 245856485, now seen corresponding path program 1 times [2020-09-04 23:10:24,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:24,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707035349] [2020-09-04 23:10:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:24,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:24,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707035349] [2020-09-04 23:10:24,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:24,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:10:24,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873471446] [2020-09-04 23:10:24,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:10:24,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:24,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:10:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:10:24,797 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2020-09-04 23:10:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:25,005 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-04 23:10:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:10:25,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-04 23:10:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:25,008 INFO L225 Difference]: With dead ends: 88 [2020-09-04 23:10:25,008 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 23:10:25,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:25,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 23:10:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 40. [2020-09-04 23:10:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 23:10:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-04 23:10:25,022 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2020-09-04 23:10:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:25,023 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-04 23:10:25,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:10:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-04 23:10:25,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 23:10:25,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:25,025 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 23:10:25,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:10:25,025 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:25,026 INFO L82 PathProgramCache]: Analyzing trace with hash 352436069, now seen corresponding path program 1 times [2020-09-04 23:10:25,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:25,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143667490] [2020-09-04 23:10:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:25,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:25,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143667490] [2020-09-04 23:10:25,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:25,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:10:25,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583147574] [2020-09-04 23:10:25,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:10:25,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:25,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:10:25,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:10:25,132 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 4 states. [2020-09-04 23:10:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:25,308 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-09-04 23:10:25,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:10:25,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-09-04 23:10:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:25,310 INFO L225 Difference]: With dead ends: 100 [2020-09-04 23:10:25,310 INFO L226 Difference]: Without dead ends: 78 [2020-09-04 23:10:25,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-04 23:10:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2020-09-04 23:10:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 23:10:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-04 23:10:25,322 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 26 [2020-09-04 23:10:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:25,322 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-04 23:10:25,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:10:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-04 23:10:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 23:10:25,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:25,324 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-09-04 23:10:25,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:10:25,324 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:25,325 INFO L82 PathProgramCache]: Analyzing trace with hash -80258988, now seen corresponding path program 1 times [2020-09-04 23:10:25,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:25,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116161167] [2020-09-04 23:10:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:25,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:25,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116161167] [2020-09-04 23:10:25,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:25,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:10:25,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36121925] [2020-09-04 23:10:25,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:10:25,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:25,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:10:25,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:10:25,421 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-09-04 23:10:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:25,609 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-09-04 23:10:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:10:25,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-04 23:10:25,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:25,611 INFO L225 Difference]: With dead ends: 79 [2020-09-04 23:10:25,611 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 23:10:25,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 23:10:25,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-09-04 23:10:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 23:10:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-04 23:10:25,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2020-09-04 23:10:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:25,621 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-04 23:10:25,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:10:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-04 23:10:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 23:10:25,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:25,622 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:25,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:10:25,623 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:25,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1305862455, now seen corresponding path program 1 times [2020-09-04 23:10:25,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:25,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488154557] [2020-09-04 23:10:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:25,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:25,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488154557] [2020-09-04 23:10:25,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:25,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 23:10:25,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599514460] [2020-09-04 23:10:25,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:10:25,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:25,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:10:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:10:25,769 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 6 states. [2020-09-04 23:10:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:25,930 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-09-04 23:10:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 23:10:25,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-04 23:10:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:25,932 INFO L225 Difference]: With dead ends: 89 [2020-09-04 23:10:25,932 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 23:10:25,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:10:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 23:10:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-09-04 23:10:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 23:10:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-04 23:10:25,942 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 41 [2020-09-04 23:10:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:25,942 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-04 23:10:25,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:10:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-04 23:10:25,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 23:10:25,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:25,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:25,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:10:25,945 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1372608588, now seen corresponding path program 2 times [2020-09-04 23:10:25,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:25,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081072507] [2020-09-04 23:10:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:26,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:26,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081072507] [2020-09-04 23:10:26,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:26,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:10:26,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025558348] [2020-09-04 23:10:26,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:10:26,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:26,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:10:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:10:26,151 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 8 states. [2020-09-04 23:10:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:26,379 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-09-04 23:10:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:10:26,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-09-04 23:10:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:26,381 INFO L225 Difference]: With dead ends: 107 [2020-09-04 23:10:26,381 INFO L226 Difference]: Without dead ends: 74 [2020-09-04 23:10:26,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:10:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-04 23:10:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-09-04 23:10:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 23:10:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-09-04 23:10:26,392 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2020-09-04 23:10:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:26,393 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-09-04 23:10:26,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:10:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-09-04 23:10:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-04 23:10:26,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:26,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2020-09-04 23:10:26,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:10:26,395 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:26,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:26,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1219437097, now seen corresponding path program 3 times [2020-09-04 23:10:26,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:26,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881900507] [2020-09-04 23:10:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:26,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:26,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881900507] [2020-09-04 23:10:26,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:26,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:10:26,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155617772] [2020-09-04 23:10:26,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:10:26,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:26,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:10:26,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:10:26,616 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2020-09-04 23:10:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:26,937 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-09-04 23:10:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 23:10:26,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-04 23:10:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:26,939 INFO L225 Difference]: With dead ends: 125 [2020-09-04 23:10:26,939 INFO L226 Difference]: Without dead ends: 83 [2020-09-04 23:10:26,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:10:26,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-04 23:10:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-09-04 23:10:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 23:10:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-09-04 23:10:26,950 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2020-09-04 23:10:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:26,950 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-09-04 23:10:26,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:10:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-09-04 23:10:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-04 23:10:26,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:26,952 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2020-09-04 23:10:26,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:10:26,953 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1194778388, now seen corresponding path program 4 times [2020-09-04 23:10:26,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:26,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932888948] [2020-09-04 23:10:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:27,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:27,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932888948] [2020-09-04 23:10:27,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:27,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:10:27,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147077309] [2020-09-04 23:10:27,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:10:27,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:10:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:10:27,203 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 12 states. [2020-09-04 23:10:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:27,599 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-09-04 23:10:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 23:10:27,600 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-09-04 23:10:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:27,601 INFO L225 Difference]: With dead ends: 143 [2020-09-04 23:10:27,602 INFO L226 Difference]: Without dead ends: 92 [2020-09-04 23:10:27,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:10:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-04 23:10:27,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2020-09-04 23:10:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 23:10:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-04 23:10:27,623 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-04 23:10:27,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:27,623 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-04 23:10:27,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:10:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-04 23:10:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-04 23:10:27,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:27,625 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1] [2020-09-04 23:10:27,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:10:27,625 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:27,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1191054729, now seen corresponding path program 5 times [2020-09-04 23:10:27,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:27,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147399640] [2020-09-04 23:10:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:27,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:27,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147399640] [2020-09-04 23:10:27,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:27,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 23:10:27,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710404192] [2020-09-04 23:10:27,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 23:10:27,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:27,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 23:10:27,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-04 23:10:27,902 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 14 states. [2020-09-04 23:10:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:28,441 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-09-04 23:10:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 23:10:28,442 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-09-04 23:10:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:28,443 INFO L225 Difference]: With dead ends: 161 [2020-09-04 23:10:28,443 INFO L226 Difference]: Without dead ends: 101 [2020-09-04 23:10:28,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-09-04 23:10:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-04 23:10:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-09-04 23:10:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-04 23:10:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-09-04 23:10:28,455 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2020-09-04 23:10:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:28,455 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-09-04 23:10:28,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 23:10:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-09-04 23:10:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 23:10:28,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:28,457 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1] [2020-09-04 23:10:28,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:10:28,457 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:28,458 INFO L82 PathProgramCache]: Analyzing trace with hash 123928180, now seen corresponding path program 6 times [2020-09-04 23:10:28,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:28,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952320656] [2020-09-04 23:10:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:28,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:28,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952320656] [2020-09-04 23:10:28,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:28,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 23:10:28,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784074001] [2020-09-04 23:10:28,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 23:10:28,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:28,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 23:10:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:10:28,810 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 16 states. [2020-09-04 23:10:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:29,553 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2020-09-04 23:10:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 23:10:29,553 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-09-04 23:10:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:29,555 INFO L225 Difference]: With dead ends: 179 [2020-09-04 23:10:29,555 INFO L226 Difference]: Without dead ends: 110 [2020-09-04 23:10:29,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:10:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-04 23:10:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-09-04 23:10:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-04 23:10:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-09-04 23:10:29,568 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 86 [2020-09-04 23:10:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:29,568 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-09-04 23:10:29,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 23:10:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-09-04 23:10:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-04 23:10:29,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:29,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1] [2020-09-04 23:10:29,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:10:29,571 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash -359457001, now seen corresponding path program 7 times [2020-09-04 23:10:29,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:29,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488348262] [2020-09-04 23:10:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:29,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:29,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488348262] [2020-09-04 23:10:29,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:29,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 23:10:29,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086961960] [2020-09-04 23:10:29,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 23:10:29,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 23:10:29,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:10:29,974 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 18 states. [2020-09-04 23:10:30,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:30,846 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2020-09-04 23:10:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 23:10:30,846 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-09-04 23:10:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:30,847 INFO L225 Difference]: With dead ends: 197 [2020-09-04 23:10:30,848 INFO L226 Difference]: Without dead ends: 119 [2020-09-04 23:10:30,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 23:10:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-04 23:10:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2020-09-04 23:10:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-04 23:10:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-09-04 23:10:30,865 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-09-04 23:10:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:30,865 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-09-04 23:10:30,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 23:10:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-09-04 23:10:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-04 23:10:30,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:30,871 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1] [2020-09-04 23:10:30,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 23:10:30,872 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1447691732, now seen corresponding path program 8 times [2020-09-04 23:10:30,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:30,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196961475] [2020-09-04 23:10:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:31,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 2 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:31,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196961475] [2020-09-04 23:10:31,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:31,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 23:10:31,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124179721] [2020-09-04 23:10:31,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 23:10:31,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:31,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 23:10:31,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:10:31,331 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 20 states. [2020-09-04 23:10:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:32,328 INFO L93 Difference]: Finished difference Result 215 states and 220 transitions. [2020-09-04 23:10:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 23:10:32,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-09-04 23:10:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:32,329 INFO L225 Difference]: With dead ends: 215 [2020-09-04 23:10:32,329 INFO L226 Difference]: Without dead ends: 128 [2020-09-04 23:10:32,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:10:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-04 23:10:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2020-09-04 23:10:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 23:10:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-09-04 23:10:32,339 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 104 [2020-09-04 23:10:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:32,340 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-09-04 23:10:32,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 23:10:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-09-04 23:10:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-04 23:10:32,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:32,341 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1] [2020-09-04 23:10:32,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 23:10:32,342 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash 221143991, now seen corresponding path program 9 times [2020-09-04 23:10:32,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:32,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954847474] [2020-09-04 23:10:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:32,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 2 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:32,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954847474] [2020-09-04 23:10:32,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:32,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 23:10:32,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633298066] [2020-09-04 23:10:32,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 23:10:32,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:32,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 23:10:32,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:10:32,842 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 22 states. [2020-09-04 23:10:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:34,115 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2020-09-04 23:10:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 23:10:34,116 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 113 [2020-09-04 23:10:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:34,117 INFO L225 Difference]: With dead ends: 233 [2020-09-04 23:10:34,117 INFO L226 Difference]: Without dead ends: 137 [2020-09-04 23:10:34,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=1495, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 23:10:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-04 23:10:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2020-09-04 23:10:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-04 23:10:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-09-04 23:10:34,131 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 113 [2020-09-04 23:10:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:34,131 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-09-04 23:10:34,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 23:10:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-09-04 23:10:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-04 23:10:34,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:34,136 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1] [2020-09-04 23:10:34,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:10:34,136 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash 570553652, now seen corresponding path program 10 times [2020-09-04 23:10:34,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:34,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864611937] [2020-09-04 23:10:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:34,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:34,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864611937] [2020-09-04 23:10:34,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:34,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 23:10:34,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124795275] [2020-09-04 23:10:34,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 23:10:34,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 23:10:34,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:10:34,796 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 24 states. [2020-09-04 23:10:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:36,359 INFO L93 Difference]: Finished difference Result 251 states and 256 transitions. [2020-09-04 23:10:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 23:10:36,360 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 122 [2020-09-04 23:10:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:36,361 INFO L225 Difference]: With dead ends: 251 [2020-09-04 23:10:36,361 INFO L226 Difference]: Without dead ends: 146 [2020-09-04 23:10:36,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 23:10:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-04 23:10:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-09-04 23:10:36,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-04 23:10:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-09-04 23:10:36,371 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 122 [2020-09-04 23:10:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:36,372 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-09-04 23:10:36,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 23:10:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-09-04 23:10:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-04 23:10:36,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:36,373 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 1, 1] [2020-09-04 23:10:36,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 23:10:36,374 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:36,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1417822121, now seen corresponding path program 11 times [2020-09-04 23:10:36,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:36,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815230023] [2020-09-04 23:10:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:36,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 2 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:37,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815230023] [2020-09-04 23:10:37,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:37,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 23:10:37,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819503532] [2020-09-04 23:10:37,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 23:10:37,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:37,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 23:10:37,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-09-04 23:10:37,009 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 26 states. [2020-09-04 23:10:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:38,740 INFO L93 Difference]: Finished difference Result 269 states and 274 transitions. [2020-09-04 23:10:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 23:10:38,744 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2020-09-04 23:10:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:38,746 INFO L225 Difference]: With dead ends: 269 [2020-09-04 23:10:38,746 INFO L226 Difference]: Without dead ends: 155 [2020-09-04 23:10:38,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=2177, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 23:10:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-04 23:10:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2020-09-04 23:10:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-04 23:10:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-09-04 23:10:38,755 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-09-04 23:10:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:38,756 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-09-04 23:10:38,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 23:10:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-09-04 23:10:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-04 23:10:38,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:38,758 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 1, 1] [2020-09-04 23:10:38,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 23:10:38,758 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1059114132, now seen corresponding path program 12 times [2020-09-04 23:10:38,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:38,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099682860] [2020-09-04 23:10:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:39,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 2 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:39,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099682860] [2020-09-04 23:10:39,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:39,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 23:10:39,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887376530] [2020-09-04 23:10:39,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 23:10:39,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:39,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 23:10:39,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-09-04 23:10:39,624 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 28 states. [2020-09-04 23:10:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:41,651 INFO L93 Difference]: Finished difference Result 287 states and 292 transitions. [2020-09-04 23:10:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 23:10:41,651 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 140 [2020-09-04 23:10:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:41,653 INFO L225 Difference]: With dead ends: 287 [2020-09-04 23:10:41,653 INFO L226 Difference]: Without dead ends: 164 [2020-09-04 23:10:41,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=190, Invalid=2566, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 23:10:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-04 23:10:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2020-09-04 23:10:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-04 23:10:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-09-04 23:10:41,664 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 140 [2020-09-04 23:10:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:41,664 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-09-04 23:10:41,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 23:10:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-09-04 23:10:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-04 23:10:41,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:41,666 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 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, 1, 1] [2020-09-04 23:10:41,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 23:10:41,667 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:41,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:41,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1179962121, now seen corresponding path program 13 times [2020-09-04 23:10:41,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:41,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808014432] [2020-09-04 23:10:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:42,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808014432] [2020-09-04 23:10:42,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:42,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 23:10:42,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166739674] [2020-09-04 23:10:42,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 23:10:42,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 23:10:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-09-04 23:10:42,503 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 30 states. [2020-09-04 23:10:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:44,946 INFO L93 Difference]: Finished difference Result 305 states and 310 transitions. [2020-09-04 23:10:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 23:10:44,948 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2020-09-04 23:10:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:44,949 INFO L225 Difference]: With dead ends: 305 [2020-09-04 23:10:44,950 INFO L226 Difference]: Without dead ends: 173 [2020-09-04 23:10:44,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=2987, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 23:10:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-04 23:10:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2020-09-04 23:10:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-04 23:10:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-09-04 23:10:44,960 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 149 [2020-09-04 23:10:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:44,960 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-09-04 23:10:44,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 23:10:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-09-04 23:10:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-04 23:10:44,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:44,962 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 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, 1, 1] [2020-09-04 23:10:44,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 23:10:44,963 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:44,963 INFO L82 PathProgramCache]: Analyzing trace with hash -927167500, now seen corresponding path program 14 times [2020-09-04 23:10:44,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:44,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776940340] [2020-09-04 23:10:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:45,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 2 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:45,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776940340] [2020-09-04 23:10:45,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:45,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 23:10:45,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178189300] [2020-09-04 23:10:45,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 23:10:45,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:45,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 23:10:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:10:45,879 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 32 states. [2020-09-04 23:10:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:48,628 INFO L93 Difference]: Finished difference Result 323 states and 328 transitions. [2020-09-04 23:10:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 23:10:48,629 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 158 [2020-09-04 23:10:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:48,630 INFO L225 Difference]: With dead ends: 323 [2020-09-04 23:10:48,630 INFO L226 Difference]: Without dead ends: 182 [2020-09-04 23:10:48,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=220, Invalid=3440, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 23:10:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-04 23:10:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2020-09-04 23:10:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-04 23:10:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-09-04 23:10:48,641 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 158 [2020-09-04 23:10:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:48,642 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-09-04 23:10:48,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 23:10:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-09-04 23:10:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-04 23:10:48,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:48,644 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 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, 1, 1] [2020-09-04 23:10:48,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 23:10:48,644 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash 895533463, now seen corresponding path program 15 times [2020-09-04 23:10:48,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:48,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212230134] [2020-09-04 23:10:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 2 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:49,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212230134] [2020-09-04 23:10:49,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:49,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 23:10:49,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052317379] [2020-09-04 23:10:49,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 23:10:49,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:49,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 23:10:49,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 23:10:49,629 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 34 states. [2020-09-04 23:10:52,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:52,645 INFO L93 Difference]: Finished difference Result 341 states and 346 transitions. [2020-09-04 23:10:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-04 23:10:52,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-09-04 23:10:52,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:52,650 INFO L225 Difference]: With dead ends: 341 [2020-09-04 23:10:52,650 INFO L226 Difference]: Without dead ends: 191 [2020-09-04 23:10:52,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=235, Invalid=3925, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 23:10:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-04 23:10:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 177. [2020-09-04 23:10:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-04 23:10:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2020-09-04 23:10:52,662 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 167 [2020-09-04 23:10:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:52,662 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2020-09-04 23:10:52,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 23:10:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2020-09-04 23:10:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 23:10:52,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:52,665 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 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, 1, 1] [2020-09-04 23:10:52,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 23:10:52,665 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2140458156, now seen corresponding path program 16 times [2020-09-04 23:10:52,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:52,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529571650] [2020-09-04 23:10:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:53,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 2 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:53,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529571650] [2020-09-04 23:10:53,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:53,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 23:10:53,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814926220] [2020-09-04 23:10:53,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 23:10:53,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 23:10:53,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 23:10:53,907 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 36 states. [2020-09-04 23:10:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:57,371 INFO L93 Difference]: Finished difference Result 359 states and 364 transitions. [2020-09-04 23:10:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-04 23:10:57,372 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 176 [2020-09-04 23:10:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:57,374 INFO L225 Difference]: With dead ends: 359 [2020-09-04 23:10:57,374 INFO L226 Difference]: Without dead ends: 200 [2020-09-04 23:10:57,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=250, Invalid=4442, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 23:10:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-04 23:10:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2020-09-04 23:10:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-04 23:10:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-09-04 23:10:57,386 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 176 [2020-09-04 23:10:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:57,386 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-09-04 23:10:57,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 23:10:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-09-04 23:10:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-04 23:10:57,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:57,388 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 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, 1, 1] [2020-09-04 23:10:57,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 23:10:57,389 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash -976722377, now seen corresponding path program 17 times [2020-09-04 23:10:57,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:57,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027980528] [2020-09-04 23:10:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:58,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 2 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:58,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027980528] [2020-09-04 23:10:58,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:58,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 23:10:58,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139919882] [2020-09-04 23:10:58,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 23:10:58,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 23:10:58,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 23:10:58,723 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 38 states. [2020-09-04 23:11:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:02,500 INFO L93 Difference]: Finished difference Result 377 states and 382 transitions. [2020-09-04 23:11:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-04 23:11:02,502 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 185 [2020-09-04 23:11:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:02,503 INFO L225 Difference]: With dead ends: 377 [2020-09-04 23:11:02,503 INFO L226 Difference]: Without dead ends: 209 [2020-09-04 23:11:02,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=265, Invalid=4991, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 23:11:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-04 23:11:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 195. [2020-09-04 23:11:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-09-04 23:11:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2020-09-04 23:11:02,515 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 185 [2020-09-04 23:11:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:02,516 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2020-09-04 23:11:02,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 23:11:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2020-09-04 23:11:02,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-09-04 23:11:02,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:02,518 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 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, 1, 1] [2020-09-04 23:11:02,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 23:11:02,519 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:02,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:02,519 INFO L82 PathProgramCache]: Analyzing trace with hash 776127156, now seen corresponding path program 18 times [2020-09-04 23:11:02,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:02,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106791232] [2020-09-04 23:11:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:03,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 2 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:04,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106791232] [2020-09-04 23:11:04,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:04,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 23:11:04,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186835830] [2020-09-04 23:11:04,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 23:11:04,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 23:11:04,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:11:04,069 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 40 states. [2020-09-04 23:11:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:08,262 INFO L93 Difference]: Finished difference Result 395 states and 400 transitions. [2020-09-04 23:11:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-04 23:11:08,263 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 194 [2020-09-04 23:11:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:08,265 INFO L225 Difference]: With dead ends: 395 [2020-09-04 23:11:08,265 INFO L226 Difference]: Without dead ends: 218 [2020-09-04 23:11:08,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=280, Invalid=5572, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 23:11:08,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-04 23:11:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 204. [2020-09-04 23:11:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 23:11:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-09-04 23:11:08,280 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 194 [2020-09-04 23:11:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:08,281 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-09-04 23:11:08,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 23:11:08,281 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-09-04 23:11:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-09-04 23:11:08,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:08,283 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 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, 1, 1] [2020-09-04 23:11:08,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 23:11:08,284 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:08,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:08,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1535910615, now seen corresponding path program 19 times [2020-09-04 23:11:08,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:08,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947696868] [2020-09-04 23:11:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:09,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 2 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:09,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947696868] [2020-09-04 23:11:09,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:09,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 23:11:09,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158910547] [2020-09-04 23:11:09,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 23:11:09,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:09,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 23:11:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 23:11:09,938 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 42 states. [2020-09-04 23:11:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:14,677 INFO L93 Difference]: Finished difference Result 413 states and 418 transitions. [2020-09-04 23:11:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-09-04 23:11:14,678 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 203 [2020-09-04 23:11:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:14,679 INFO L225 Difference]: With dead ends: 413 [2020-09-04 23:11:14,680 INFO L226 Difference]: Without dead ends: 227 [2020-09-04 23:11:14,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=295, Invalid=6185, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 23:11:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-04 23:11:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 213. [2020-09-04 23:11:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-09-04 23:11:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2020-09-04 23:11:14,693 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 203 [2020-09-04 23:11:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:14,693 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2020-09-04 23:11:14,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 23:11:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2020-09-04 23:11:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-09-04 23:11:14,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:14,695 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 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, 1, 1] [2020-09-04 23:11:14,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 23:11:14,696 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:14,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:14,696 INFO L82 PathProgramCache]: Analyzing trace with hash 14236180, now seen corresponding path program 20 times [2020-09-04 23:11:14,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:14,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012129245] [2020-09-04 23:11:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 2 proven. 1730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:16,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012129245] [2020-09-04 23:11:16,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:16,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 23:11:16,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765679175] [2020-09-04 23:11:16,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 23:11:16,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 23:11:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 23:11:16,591 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 44 states. [2020-09-04 23:11:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:21,698 INFO L93 Difference]: Finished difference Result 431 states and 436 transitions. [2020-09-04 23:11:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-04 23:11:21,699 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 212 [2020-09-04 23:11:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:21,701 INFO L225 Difference]: With dead ends: 431 [2020-09-04 23:11:21,701 INFO L226 Difference]: Without dead ends: 236 [2020-09-04 23:11:21,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=310, Invalid=6830, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 23:11:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-04 23:11:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2020-09-04 23:11:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-04 23:11:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2020-09-04 23:11:21,712 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 212 [2020-09-04 23:11:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:21,713 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2020-09-04 23:11:21,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 23:11:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2020-09-04 23:11:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-09-04 23:11:21,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:21,714 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 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, 1, 1] [2020-09-04 23:11:21,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 23:11:21,715 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:21,715 INFO L82 PathProgramCache]: Analyzing trace with hash -791283849, now seen corresponding path program 21 times [2020-09-04 23:11:21,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:21,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107987691] [2020-09-04 23:11:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1913 backedges. 2 proven. 1911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:23,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107987691] [2020-09-04 23:11:23,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:23,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-04 23:11:23,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879467458] [2020-09-04 23:11:23,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 23:11:23,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:23,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 23:11:23,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 23:11:23,570 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand 46 states. [2020-09-04 23:11:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:29,371 INFO L93 Difference]: Finished difference Result 449 states and 454 transitions. [2020-09-04 23:11:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-09-04 23:11:29,372 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 221 [2020-09-04 23:11:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:29,374 INFO L225 Difference]: With dead ends: 449 [2020-09-04 23:11:29,374 INFO L226 Difference]: Without dead ends: 245 [2020-09-04 23:11:29,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=325, Invalid=7507, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 23:11:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-04 23:11:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2020-09-04 23:11:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-09-04 23:11:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2020-09-04 23:11:29,386 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2020-09-04 23:11:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:29,386 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2020-09-04 23:11:29,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 23:11:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2020-09-04 23:11:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-04 23:11:29,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:29,388 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 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, 1, 1] [2020-09-04 23:11:29,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 23:11:29,388 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash -314271372, now seen corresponding path program 22 times [2020-09-04 23:11:29,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:29,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678012075] [2020-09-04 23:11:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:31,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 2 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:31,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678012075] [2020-09-04 23:11:31,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:31,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-04 23:11:31,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256243646] [2020-09-04 23:11:31,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 23:11:31,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:31,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 23:11:31,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 23:11:31,583 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2020-09-04 23:11:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:37,731 INFO L93 Difference]: Finished difference Result 467 states and 472 transitions. [2020-09-04 23:11:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-09-04 23:11:37,732 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 230 [2020-09-04 23:11:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:37,733 INFO L225 Difference]: With dead ends: 467 [2020-09-04 23:11:37,733 INFO L226 Difference]: Without dead ends: 254 [2020-09-04 23:11:37,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=340, Invalid=8216, Unknown=0, NotChecked=0, Total=8556 [2020-09-04 23:11:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-04 23:11:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 240. [2020-09-04 23:11:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-04 23:11:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2020-09-04 23:11:37,745 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 230 [2020-09-04 23:11:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:37,746 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2020-09-04 23:11:37,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 23:11:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2020-09-04 23:11:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-09-04 23:11:37,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:37,748 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 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, 1, 1] [2020-09-04 23:11:37,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 23:11:37,748 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1991252969, now seen corresponding path program 23 times [2020-09-04 23:11:37,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:37,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667946998] [2020-09-04 23:11:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:40,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2302 backedges. 2 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:40,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667946998] [2020-09-04 23:11:40,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:40,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-04 23:11:40,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509808318] [2020-09-04 23:11:40,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 23:11:40,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:40,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 23:11:40,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 23:11:40,129 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 50 states. [2020-09-04 23:11:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:47,002 INFO L93 Difference]: Finished difference Result 485 states and 490 transitions. [2020-09-04 23:11:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-09-04 23:11:47,003 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 239 [2020-09-04 23:11:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:47,004 INFO L225 Difference]: With dead ends: 485 [2020-09-04 23:11:47,004 INFO L226 Difference]: Without dead ends: 263 [2020-09-04 23:11:47,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=355, Invalid=8957, Unknown=0, NotChecked=0, Total=9312 [2020-09-04 23:11:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-04 23:11:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2020-09-04 23:11:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-04 23:11:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2020-09-04 23:11:47,016 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 239 [2020-09-04 23:11:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:47,017 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2020-09-04 23:11:47,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 23:11:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2020-09-04 23:11:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-09-04 23:11:47,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:47,019 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 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, 1, 1] [2020-09-04 23:11:47,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 23:11:47,019 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:47,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:47,019 INFO L82 PathProgramCache]: Analyzing trace with hash 253419732, now seen corresponding path program 24 times [2020-09-04 23:11:47,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:47,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135371632] [2020-09-04 23:11:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:49,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 2 proven. 2508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:49,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135371632] [2020-09-04 23:11:49,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:49,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-04 23:11:49,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194675840] [2020-09-04 23:11:49,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 23:11:49,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:49,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 23:11:49,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 23:11:49,514 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand 52 states. [2020-09-04 23:11:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:57,047 INFO L93 Difference]: Finished difference Result 503 states and 508 transitions. [2020-09-04 23:11:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-09-04 23:11:57,047 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2020-09-04 23:11:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:57,049 INFO L225 Difference]: With dead ends: 503 [2020-09-04 23:11:57,049 INFO L226 Difference]: Without dead ends: 272 [2020-09-04 23:11:57,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=370, Invalid=9730, Unknown=0, NotChecked=0, Total=10100 [2020-09-04 23:11:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-04 23:11:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 258. [2020-09-04 23:11:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 23:11:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 260 transitions. [2020-09-04 23:11:57,062 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 260 transitions. Word has length 248 [2020-09-04 23:11:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:57,063 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 260 transitions. [2020-09-04 23:11:57,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 23:11:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 260 transitions. [2020-09-04 23:11:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-09-04 23:11:57,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:57,064 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 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, 1, 1] [2020-09-04 23:11:57,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 23:11:57,065 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash 304343223, now seen corresponding path program 25 times [2020-09-04 23:11:57,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:57,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027853666] [2020-09-04 23:11:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:59,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2727 backedges. 2 proven. 2725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:59,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027853666] [2020-09-04 23:11:59,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:59,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-09-04 23:11:59,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289890057] [2020-09-04 23:11:59,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-04 23:11:59,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-04 23:11:59,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 23:11:59,803 INFO L87 Difference]: Start difference. First operand 258 states and 260 transitions. Second operand 54 states. [2020-09-04 23:12:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:07,918 INFO L93 Difference]: Finished difference Result 521 states and 526 transitions. [2020-09-04 23:12:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-09-04 23:12:07,919 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 257 [2020-09-04 23:12:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:07,921 INFO L225 Difference]: With dead ends: 521 [2020-09-04 23:12:07,921 INFO L226 Difference]: Without dead ends: 281 [2020-09-04 23:12:07,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=385, Invalid=10535, Unknown=0, NotChecked=0, Total=10920 [2020-09-04 23:12:07,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-04 23:12:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 267. [2020-09-04 23:12:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-09-04 23:12:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2020-09-04 23:12:07,935 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 257 [2020-09-04 23:12:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:07,935 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2020-09-04 23:12:07,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-04 23:12:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2020-09-04 23:12:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-09-04 23:12:07,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:07,943 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 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, 1, 1] [2020-09-04 23:12:07,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 23:12:07,945 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:07,945 INFO L82 PathProgramCache]: Analyzing trace with hash 141692980, now seen corresponding path program 26 times [2020-09-04 23:12:07,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:07,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027518234] [2020-09-04 23:12:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 2 proven. 2951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:10,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027518234] [2020-09-04 23:12:10,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:10,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-09-04 23:12:10,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956467238] [2020-09-04 23:12:10,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-04 23:12:10,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:10,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-04 23:12:10,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 23:12:10,893 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand 56 states. [2020-09-04 23:12:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:19,912 INFO L93 Difference]: Finished difference Result 539 states and 544 transitions. [2020-09-04 23:12:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-09-04 23:12:19,912 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 266 [2020-09-04 23:12:19,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:19,914 INFO L225 Difference]: With dead ends: 539 [2020-09-04 23:12:19,914 INFO L226 Difference]: Without dead ends: 290 [2020-09-04 23:12:19,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=400, Invalid=11372, Unknown=0, NotChecked=0, Total=11772 [2020-09-04 23:12:19,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-04 23:12:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 276. [2020-09-04 23:12:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-04 23:12:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2020-09-04 23:12:19,924 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 266 [2020-09-04 23:12:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:19,925 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2020-09-04 23:12:19,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-04 23:12:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2020-09-04 23:12:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-09-04 23:12:19,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:19,926 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 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, 1, 1] [2020-09-04 23:12:19,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 23:12:19,926 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:19,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1040448169, now seen corresponding path program 27 times [2020-09-04 23:12:19,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:19,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866238801] [2020-09-04 23:12:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:23,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3188 backedges. 2 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:23,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866238801] [2020-09-04 23:12:23,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:23,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-09-04 23:12:23,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779995431] [2020-09-04 23:12:23,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-09-04 23:12:23,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:23,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-09-04 23:12:23,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 23:12:23,154 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand 58 states. [2020-09-04 23:12:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:32,865 INFO L93 Difference]: Finished difference Result 557 states and 562 transitions. [2020-09-04 23:12:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-09-04 23:12:32,865 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 275 [2020-09-04 23:12:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:32,867 INFO L225 Difference]: With dead ends: 557 [2020-09-04 23:12:32,867 INFO L226 Difference]: Without dead ends: 299 [2020-09-04 23:12:32,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=415, Invalid=12241, Unknown=0, NotChecked=0, Total=12656 [2020-09-04 23:12:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-04 23:12:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 285. [2020-09-04 23:12:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-09-04 23:12:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2020-09-04 23:12:32,880 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 275 [2020-09-04 23:12:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:32,880 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2020-09-04 23:12:32,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-09-04 23:12:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2020-09-04 23:12:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-09-04 23:12:32,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:32,882 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 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, 1, 1] [2020-09-04 23:12:32,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 23:12:32,882 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:32,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:32,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1642080148, now seen corresponding path program 28 times [2020-09-04 23:12:32,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:32,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318332602] [2020-09-04 23:12:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 2 proven. 3430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:36,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318332602] [2020-09-04 23:12:36,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:36,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-09-04 23:12:36,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519909887] [2020-09-04 23:12:36,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-09-04 23:12:36,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-09-04 23:12:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 23:12:36,510 INFO L87 Difference]: Start difference. First operand 285 states and 287 transitions. Second operand 60 states. [2020-09-04 23:12:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:46,987 INFO L93 Difference]: Finished difference Result 575 states and 580 transitions. [2020-09-04 23:12:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-04 23:12:46,988 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 284 [2020-09-04 23:12:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:46,990 INFO L225 Difference]: With dead ends: 575 [2020-09-04 23:12:46,990 INFO L226 Difference]: Without dead ends: 308 [2020-09-04 23:12:46,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=430, Invalid=13142, Unknown=0, NotChecked=0, Total=13572 [2020-09-04 23:12:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-09-04 23:12:47,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 294. [2020-09-04 23:12:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-09-04 23:12:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 296 transitions. [2020-09-04 23:12:47,004 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 296 transitions. Word has length 284 [2020-09-04 23:12:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:47,004 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 296 transitions. [2020-09-04 23:12:47,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-09-04 23:12:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 296 transitions. [2020-09-04 23:12:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-09-04 23:12:47,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:47,006 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 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, 1, 1] [2020-09-04 23:12:47,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 23:12:47,006 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1493318135, now seen corresponding path program 29 times [2020-09-04 23:12:47,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:47,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975563468] [2020-09-04 23:12:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:50,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3685 backedges. 2 proven. 3683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:50,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975563468] [2020-09-04 23:12:50,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:50,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-09-04 23:12:50,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125480549] [2020-09-04 23:12:50,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-09-04 23:12:50,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:50,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-09-04 23:12:50,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 23:12:50,734 INFO L87 Difference]: Start difference. First operand 294 states and 296 transitions. Second operand 62 states. [2020-09-04 23:13:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:02,236 INFO L93 Difference]: Finished difference Result 593 states and 598 transitions. [2020-09-04 23:13:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-09-04 23:13:02,237 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 293 [2020-09-04 23:13:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:02,239 INFO L225 Difference]: With dead ends: 593 [2020-09-04 23:13:02,239 INFO L226 Difference]: Without dead ends: 317 [2020-09-04 23:13:02,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=445, Invalid=14075, Unknown=0, NotChecked=0, Total=14520 [2020-09-04 23:13:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-09-04 23:13:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 303. [2020-09-04 23:13:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-09-04 23:13:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 305 transitions. [2020-09-04 23:13:02,253 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 305 transitions. Word has length 293 [2020-09-04 23:13:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:02,253 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 305 transitions. [2020-09-04 23:13:02,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-09-04 23:13:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 305 transitions. [2020-09-04 23:13:02,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-09-04 23:13:02,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:02,255 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 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, 1, 1] [2020-09-04 23:13:02,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 23:13:02,256 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:02,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:02,256 INFO L82 PathProgramCache]: Analyzing trace with hash -361027852, now seen corresponding path program 30 times [2020-09-04 23:13:02,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:02,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028046972] [2020-09-04 23:13:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:06,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3947 backedges. 2 proven. 3945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:06,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028046972] [2020-09-04 23:13:06,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:06,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-09-04 23:13:06,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732380392] [2020-09-04 23:13:06,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-09-04 23:13:06,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:06,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-09-04 23:13:06,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 23:13:06,299 INFO L87 Difference]: Start difference. First operand 303 states and 305 transitions. Second operand 64 states. [2020-09-04 23:13:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:18,721 INFO L93 Difference]: Finished difference Result 611 states and 616 transitions. [2020-09-04 23:13:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-09-04 23:13:18,722 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 302 [2020-09-04 23:13:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:18,723 INFO L225 Difference]: With dead ends: 611 [2020-09-04 23:13:18,724 INFO L226 Difference]: Without dead ends: 326 [2020-09-04 23:13:18,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=460, Invalid=15040, Unknown=0, NotChecked=0, Total=15500 [2020-09-04 23:13:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-09-04 23:13:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 312. [2020-09-04 23:13:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-09-04 23:13:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 314 transitions. [2020-09-04 23:13:18,755 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 314 transitions. Word has length 302 [2020-09-04 23:13:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:18,756 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 314 transitions. [2020-09-04 23:13:18,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-09-04 23:13:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 314 transitions. [2020-09-04 23:13:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-09-04 23:13:18,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:18,758 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 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, 1, 1] [2020-09-04 23:13:18,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 23:13:18,758 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:18,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1595898217, now seen corresponding path program 31 times [2020-09-04 23:13:18,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:18,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359756498] [2020-09-04 23:13:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 2 proven. 4216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:23,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359756498] [2020-09-04 23:13:23,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:23,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-09-04 23:13:23,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906959168] [2020-09-04 23:13:23,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-09-04 23:13:23,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-09-04 23:13:23,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 23:13:23,102 INFO L87 Difference]: Start difference. First operand 312 states and 314 transitions. Second operand 66 states. [2020-09-04 23:13:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:36,559 INFO L93 Difference]: Finished difference Result 629 states and 634 transitions. [2020-09-04 23:13:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-09-04 23:13:36,560 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 311 [2020-09-04 23:13:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:36,561 INFO L225 Difference]: With dead ends: 629 [2020-09-04 23:13:36,562 INFO L226 Difference]: Without dead ends: 335 [2020-09-04 23:13:36,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=475, Invalid=16037, Unknown=0, NotChecked=0, Total=16512 [2020-09-04 23:13:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-09-04 23:13:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 321. [2020-09-04 23:13:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-09-04 23:13:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 323 transitions. [2020-09-04 23:13:36,577 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 323 transitions. Word has length 311 [2020-09-04 23:13:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:36,577 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 323 transitions. [2020-09-04 23:13:36,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-09-04 23:13:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 323 transitions. [2020-09-04 23:13:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-09-04 23:13:36,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:36,579 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 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, 1, 1] [2020-09-04 23:13:36,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 23:13:36,580 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash 400100948, now seen corresponding path program 32 times [2020-09-04 23:13:36,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:36,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158566015] [2020-09-04 23:13:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 2 proven. 4496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:41,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158566015] [2020-09-04 23:13:41,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:41,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-09-04 23:13:41,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629933170] [2020-09-04 23:13:41,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-09-04 23:13:41,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:41,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-09-04 23:13:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 23:13:41,291 INFO L87 Difference]: Start difference. First operand 321 states and 323 transitions. Second operand 68 states. [2020-09-04 23:13:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:55,561 INFO L93 Difference]: Finished difference Result 647 states and 652 transitions. [2020-09-04 23:13:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-09-04 23:13:55,562 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 320 [2020-09-04 23:13:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:55,563 INFO L225 Difference]: With dead ends: 647 [2020-09-04 23:13:55,564 INFO L226 Difference]: Without dead ends: 344 [2020-09-04 23:13:55,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=490, Invalid=17066, Unknown=0, NotChecked=0, Total=17556 [2020-09-04 23:13:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-09-04 23:13:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 330. [2020-09-04 23:13:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-04 23:13:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 332 transitions. [2020-09-04 23:13:55,578 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 332 transitions. Word has length 320 [2020-09-04 23:13:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:55,579 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 332 transitions. [2020-09-04 23:13:55,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-09-04 23:13:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 332 transitions. [2020-09-04 23:13:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-09-04 23:13:55,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:55,581 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 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, 1, 1] [2020-09-04 23:13:55,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 23:13:55,581 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash 213969719, now seen corresponding path program 33 times [2020-09-04 23:13:55,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:55,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081848164] [2020-09-04 23:13:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:00,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4787 backedges. 2 proven. 4785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:00,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081848164] [2020-09-04 23:14:00,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:00,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-09-04 23:14:00,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065549699] [2020-09-04 23:14:00,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-04 23:14:00,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:00,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-04 23:14:00,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-09-04 23:14:00,593 INFO L87 Difference]: Start difference. First operand 330 states and 332 transitions. Second operand 70 states. [2020-09-04 23:14:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:15,879 INFO L93 Difference]: Finished difference Result 665 states and 670 transitions. [2020-09-04 23:14:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-09-04 23:14:15,881 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 329 [2020-09-04 23:14:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:15,882 INFO L225 Difference]: With dead ends: 665 [2020-09-04 23:14:15,882 INFO L226 Difference]: Without dead ends: 353 [2020-09-04 23:14:15,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=505, Invalid=18127, Unknown=0, NotChecked=0, Total=18632 [2020-09-04 23:14:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-09-04 23:14:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 339. [2020-09-04 23:14:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-09-04 23:14:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 341 transitions. [2020-09-04 23:14:15,901 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 341 transitions. Word has length 329 [2020-09-04 23:14:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:15,901 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 341 transitions. [2020-09-04 23:14:15,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-04 23:14:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 341 transitions. [2020-09-04 23:14:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-09-04 23:14:15,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:15,904 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 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, 1, 1] [2020-09-04 23:14:15,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 23:14:15,904 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1712315828, now seen corresponding path program 34 times [2020-09-04 23:14:15,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:15,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906277155] [2020-09-04 23:14:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5085 backedges. 2 proven. 5083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:21,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906277155] [2020-09-04 23:14:21,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:21,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-09-04 23:14:21,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882950336] [2020-09-04 23:14:21,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-09-04 23:14:21,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:21,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-09-04 23:14:21,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 23:14:21,255 INFO L87 Difference]: Start difference. First operand 339 states and 341 transitions. Second operand 72 states. [2020-09-04 23:14:37,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:37,869 INFO L93 Difference]: Finished difference Result 683 states and 688 transitions. [2020-09-04 23:14:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-09-04 23:14:37,869 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 338 [2020-09-04 23:14:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:37,871 INFO L225 Difference]: With dead ends: 683 [2020-09-04 23:14:37,872 INFO L226 Difference]: Without dead ends: 362 [2020-09-04 23:14:37,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=520, Invalid=19220, Unknown=0, NotChecked=0, Total=19740 [2020-09-04 23:14:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-09-04 23:14:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 348. [2020-09-04 23:14:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-09-04 23:14:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 350 transitions. [2020-09-04 23:14:37,887 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 350 transitions. Word has length 338 [2020-09-04 23:14:37,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:37,888 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 350 transitions. [2020-09-04 23:14:37,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-09-04 23:14:37,888 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 350 transitions. [2020-09-04 23:14:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-09-04 23:14:37,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:37,890 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 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, 1, 1] [2020-09-04 23:14:37,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 23:14:37,890 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1498245079, now seen corresponding path program 35 times [2020-09-04 23:14:37,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:37,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129222662] [2020-09-04 23:14:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:43,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5392 backedges. 2 proven. 5390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:43,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129222662] [2020-09-04 23:14:43,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:43,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-09-04 23:14:43,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615819458] [2020-09-04 23:14:43,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-04 23:14:43,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:43,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-04 23:14:43,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 23:14:43,548 INFO L87 Difference]: Start difference. First operand 348 states and 350 transitions. Second operand 74 states. [2020-09-04 23:15:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:01,186 INFO L93 Difference]: Finished difference Result 701 states and 706 transitions. [2020-09-04 23:15:01,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-09-04 23:15:01,187 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 347 [2020-09-04 23:15:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:01,189 INFO L225 Difference]: With dead ends: 701 [2020-09-04 23:15:01,189 INFO L226 Difference]: Without dead ends: 371 [2020-09-04 23:15:01,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=535, Invalid=20345, Unknown=0, NotChecked=0, Total=20880 [2020-09-04 23:15:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-09-04 23:15:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 357. [2020-09-04 23:15:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-09-04 23:15:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 359 transitions. [2020-09-04 23:15:01,205 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 359 transitions. Word has length 347 [2020-09-04 23:15:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:01,205 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 359 transitions. [2020-09-04 23:15:01,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-09-04 23:15:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 359 transitions. [2020-09-04 23:15:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-09-04 23:15:01,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:01,208 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 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, 1, 1] [2020-09-04 23:15:01,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 23:15:01,208 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:01,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1212836588, now seen corresponding path program 36 times [2020-09-04 23:15:01,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:01,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245451355] [2020-09-04 23:15:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:07,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5708 backedges. 2 proven. 5706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:07,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245451355] [2020-09-04 23:15:07,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:07,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-09-04 23:15:07,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696433916] [2020-09-04 23:15:07,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-09-04 23:15:07,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:07,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-09-04 23:15:07,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 23:15:07,330 INFO L87 Difference]: Start difference. First operand 357 states and 359 transitions. Second operand 76 states. [2020-09-04 23:15:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:26,217 INFO L93 Difference]: Finished difference Result 719 states and 724 transitions. [2020-09-04 23:15:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-09-04 23:15:26,218 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 356 [2020-09-04 23:15:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:26,219 INFO L225 Difference]: With dead ends: 719 [2020-09-04 23:15:26,219 INFO L226 Difference]: Without dead ends: 380 [2020-09-04 23:15:26,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=550, Invalid=21502, Unknown=0, NotChecked=0, Total=22052 [2020-09-04 23:15:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-09-04 23:15:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 366. [2020-09-04 23:15:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-09-04 23:15:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 368 transitions. [2020-09-04 23:15:26,238 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 368 transitions. Word has length 356 [2020-09-04 23:15:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:26,239 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 368 transitions. [2020-09-04 23:15:26,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-09-04 23:15:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 368 transitions. [2020-09-04 23:15:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-09-04 23:15:26,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:26,243 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 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, 1, 1] [2020-09-04 23:15:26,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 23:15:26,244 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:26,244 INFO L82 PathProgramCache]: Analyzing trace with hash 749730935, now seen corresponding path program 37 times [2020-09-04 23:15:26,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:26,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726686283] [2020-09-04 23:15:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:32,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6033 backedges. 2 proven. 6031 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:32,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726686283] [2020-09-04 23:15:32,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:32,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-09-04 23:15:32,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062123096] [2020-09-04 23:15:32,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-09-04 23:15:32,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-09-04 23:15:32,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-09-04 23:15:32,661 INFO L87 Difference]: Start difference. First operand 366 states and 368 transitions. Second operand 78 states. [2020-09-04 23:15:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:52,705 INFO L93 Difference]: Finished difference Result 737 states and 742 transitions. [2020-09-04 23:15:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-09-04 23:15:52,706 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 365 [2020-09-04 23:15:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:52,708 INFO L225 Difference]: With dead ends: 737 [2020-09-04 23:15:52,708 INFO L226 Difference]: Without dead ends: 389 [2020-09-04 23:15:52,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=565, Invalid=22691, Unknown=0, NotChecked=0, Total=23256 [2020-09-04 23:15:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-09-04 23:15:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 375. [2020-09-04 23:15:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-09-04 23:15:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 377 transitions. [2020-09-04 23:15:52,723 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 377 transitions. Word has length 365 [2020-09-04 23:15:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:52,724 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 377 transitions. [2020-09-04 23:15:52,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-09-04 23:15:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 377 transitions. [2020-09-04 23:15:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-09-04 23:15:52,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:52,727 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 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, 1, 1] [2020-09-04 23:15:52,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 23:15:52,727 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:52,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1243597708, now seen corresponding path program 38 times [2020-09-04 23:15:52,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:52,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101266333] [2020-09-04 23:15:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6367 backedges. 2 proven. 6365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:59,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101266333] [2020-09-04 23:15:59,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:59,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-09-04 23:15:59,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397615643] [2020-09-04 23:15:59,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-09-04 23:15:59,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:59,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-09-04 23:15:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 23:15:59,531 INFO L87 Difference]: Start difference. First operand 375 states and 377 transitions. Second operand 80 states. [2020-09-04 23:16:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:20,854 INFO L93 Difference]: Finished difference Result 755 states and 760 transitions. [2020-09-04 23:16:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-09-04 23:16:20,855 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 374 [2020-09-04 23:16:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:20,857 INFO L225 Difference]: With dead ends: 755 [2020-09-04 23:16:20,857 INFO L226 Difference]: Without dead ends: 398 [2020-09-04 23:16:20,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=580, Invalid=23912, Unknown=0, NotChecked=0, Total=24492 [2020-09-04 23:16:20,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-09-04 23:16:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 384. [2020-09-04 23:16:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-09-04 23:16:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 386 transitions. [2020-09-04 23:16:20,872 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 386 transitions. Word has length 374 [2020-09-04 23:16:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:20,872 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 386 transitions. [2020-09-04 23:16:20,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-09-04 23:16:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 386 transitions. [2020-09-04 23:16:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-09-04 23:16:20,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:20,875 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 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, 1, 1] [2020-09-04 23:16:20,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 23:16:20,875 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:20,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1231902441, now seen corresponding path program 39 times [2020-09-04 23:16:20,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:20,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197136513] [2020-09-04 23:16:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:28,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6710 backedges. 2 proven. 6708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:28,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197136513] [2020-09-04 23:16:28,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:28,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-09-04 23:16:28,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800219578] [2020-09-04 23:16:28,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-09-04 23:16:28,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:28,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-09-04 23:16:28,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-09-04 23:16:28,201 INFO L87 Difference]: Start difference. First operand 384 states and 386 transitions. Second operand 82 states. [2020-09-04 23:16:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:50,869 INFO L93 Difference]: Finished difference Result 773 states and 778 transitions. [2020-09-04 23:16:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-09-04 23:16:50,870 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 383 [2020-09-04 23:16:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:50,872 INFO L225 Difference]: With dead ends: 773 [2020-09-04 23:16:50,872 INFO L226 Difference]: Without dead ends: 407 [2020-09-04 23:16:50,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=595, Invalid=25165, Unknown=0, NotChecked=0, Total=25760 [2020-09-04 23:16:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-09-04 23:16:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2020-09-04 23:16:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-09-04 23:16:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 395 transitions. [2020-09-04 23:16:50,890 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 395 transitions. Word has length 383 [2020-09-04 23:16:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:50,890 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 395 transitions. [2020-09-04 23:16:50,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-09-04 23:16:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 395 transitions. [2020-09-04 23:16:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-09-04 23:16:50,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:50,893 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 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, 1, 1] [2020-09-04 23:16:50,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 23:16:50,894 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:50,894 INFO L82 PathProgramCache]: Analyzing trace with hash 807779284, now seen corresponding path program 40 times [2020-09-04 23:16:50,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:50,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993848600] [2020-09-04 23:16:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:58,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7062 backedges. 2 proven. 7060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:58,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993848600] [2020-09-04 23:16:58,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:58,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-09-04 23:16:58,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720377957] [2020-09-04 23:16:58,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-09-04 23:16:58,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:58,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-09-04 23:16:58,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 23:16:58,652 INFO L87 Difference]: Start difference. First operand 393 states and 395 transitions. Second operand 84 states. [2020-09-04 23:17:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:23,172 INFO L93 Difference]: Finished difference Result 791 states and 796 transitions. [2020-09-04 23:17:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-09-04 23:17:23,173 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 392 [2020-09-04 23:17:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:23,174 INFO L225 Difference]: With dead ends: 791 [2020-09-04 23:17:23,175 INFO L226 Difference]: Without dead ends: 416 [2020-09-04 23:17:23,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=610, Invalid=26450, Unknown=0, NotChecked=0, Total=27060 [2020-09-04 23:17:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-09-04 23:17:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 402. [2020-09-04 23:17:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-09-04 23:17:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 404 transitions. [2020-09-04 23:17:23,190 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 404 transitions. Word has length 392 [2020-09-04 23:17:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:23,191 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 404 transitions. [2020-09-04 23:17:23,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-09-04 23:17:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 404 transitions. [2020-09-04 23:17:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-09-04 23:17:23,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:23,194 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 41, 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, 1, 1] [2020-09-04 23:17:23,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 23:17:23,194 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:23,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1344236983, now seen corresponding path program 41 times [2020-09-04 23:17:23,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:23,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204062134] [2020-09-04 23:17:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:31,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 2 proven. 7421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:31,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204062134] [2020-09-04 23:17:31,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:31,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-09-04 23:17:31,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169070948] [2020-09-04 23:17:31,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-09-04 23:17:31,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:31,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-09-04 23:17:31,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-09-04 23:17:31,681 INFO L87 Difference]: Start difference. First operand 402 states and 404 transitions. Second operand 86 states. [2020-09-04 23:17:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:57,845 INFO L93 Difference]: Finished difference Result 809 states and 814 transitions. [2020-09-04 23:17:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-09-04 23:17:57,846 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 401 [2020-09-04 23:17:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:57,848 INFO L225 Difference]: With dead ends: 809 [2020-09-04 23:17:57,848 INFO L226 Difference]: Without dead ends: 425 [2020-09-04 23:17:57,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=625, Invalid=27767, Unknown=0, NotChecked=0, Total=28392 [2020-09-04 23:17:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-09-04 23:17:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 411. [2020-09-04 23:17:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-09-04 23:17:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 413 transitions. [2020-09-04 23:17:57,863 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 413 transitions. Word has length 401 [2020-09-04 23:17:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:57,864 INFO L479 AbstractCegarLoop]: Abstraction has 411 states and 413 transitions. [2020-09-04 23:17:57,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-09-04 23:17:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 413 transitions. [2020-09-04 23:17:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-04 23:17:57,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:57,867 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 42, 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, 1, 1] [2020-09-04 23:17:57,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 23:17:57,867 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2090609460, now seen corresponding path program 42 times [2020-09-04 23:17:57,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:57,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446933696] [2020-09-04 23:17:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:06,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7793 backedges. 2 proven. 7791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:07,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446933696] [2020-09-04 23:18:07,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:07,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-09-04 23:18:07,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203959021] [2020-09-04 23:18:07,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-09-04 23:18:07,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-09-04 23:18:07,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=7441, Unknown=0, NotChecked=0, Total=7656 [2020-09-04 23:18:07,115 INFO L87 Difference]: Start difference. First operand 411 states and 413 transitions. Second operand 88 states. [2020-09-04 23:18:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:36,010 INFO L93 Difference]: Finished difference Result 827 states and 832 transitions. [2020-09-04 23:18:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-09-04 23:18:36,012 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 410 [2020-09-04 23:18:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:36,014 INFO L225 Difference]: With dead ends: 827 [2020-09-04 23:18:36,014 INFO L226 Difference]: Without dead ends: 434 [2020-09-04 23:18:36,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=640, Invalid=29116, Unknown=0, NotChecked=0, Total=29756 [2020-09-04 23:18:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-04 23:18:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-04 23:18:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-04 23:18:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2020-09-04 23:18:36,032 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 410 [2020-09-04 23:18:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:36,032 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2020-09-04 23:18:36,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-09-04 23:18:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2020-09-04 23:18:36,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-04 23:18:36,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:36,035 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 43, 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, 1, 1] [2020-09-04 23:18:36,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 23:18:36,036 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:36,036 INFO L82 PathProgramCache]: Analyzing trace with hash 469781079, now seen corresponding path program 43 times [2020-09-04 23:18:36,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:36,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970040119] [2020-09-04 23:18:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:46,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8172 backedges. 2 proven. 8170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:46,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970040119] [2020-09-04 23:18:46,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:46,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-09-04 23:18:46,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054688330] [2020-09-04 23:18:46,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-09-04 23:18:46,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:46,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-09-04 23:18:46,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=7790, Unknown=0, NotChecked=0, Total=8010 [2020-09-04 23:18:46,257 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand 90 states. [2020-09-04 23:19:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:18,943 INFO L93 Difference]: Finished difference Result 845 states and 850 transitions. [2020-09-04 23:19:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-09-04 23:19:18,946 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 419 [2020-09-04 23:19:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:18,948 INFO L225 Difference]: With dead ends: 845 [2020-09-04 23:19:18,948 INFO L226 Difference]: Without dead ends: 443 [2020-09-04 23:19:18,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=655, Invalid=30497, Unknown=0, NotChecked=0, Total=31152 [2020-09-04 23:19:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-09-04 23:19:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 429. [2020-09-04 23:19:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-09-04 23:19:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 431 transitions. [2020-09-04 23:19:18,964 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 431 transitions. Word has length 419 [2020-09-04 23:19:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:18,965 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 431 transitions. [2020-09-04 23:19:18,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-09-04 23:19:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 431 transitions. [2020-09-04 23:19:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-09-04 23:19:18,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:18,968 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 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, 1, 1] [2020-09-04 23:19:18,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 23:19:18,969 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash -673611116, now seen corresponding path program 44 times [2020-09-04 23:19:18,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:18,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48303668] [2020-09-04 23:19:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8560 backedges. 2 proven. 8558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:30,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48303668] [2020-09-04 23:19:30,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:30,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-09-04 23:19:30,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538212561] [2020-09-04 23:19:30,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-09-04 23:19:30,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-09-04 23:19:30,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=8147, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 23:19:30,563 INFO L87 Difference]: Start difference. First operand 429 states and 431 transitions. Second operand 92 states. [2020-09-04 23:20:08,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:08,717 INFO L93 Difference]: Finished difference Result 863 states and 868 transitions. [2020-09-04 23:20:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-09-04 23:20:08,722 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 428 [2020-09-04 23:20:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:08,725 INFO L225 Difference]: With dead ends: 863 [2020-09-04 23:20:08,725 INFO L226 Difference]: Without dead ends: 452 [2020-09-04 23:20:08,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=670, Invalid=31910, Unknown=0, NotChecked=0, Total=32580 [2020-09-04 23:20:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-09-04 23:20:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2020-09-04 23:20:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-09-04 23:20:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 440 transitions. [2020-09-04 23:20:08,740 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 440 transitions. Word has length 428 [2020-09-04 23:20:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:08,740 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 440 transitions. [2020-09-04 23:20:08,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-09-04 23:20:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 440 transitions. [2020-09-04 23:20:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-09-04 23:20:08,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:08,743 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 45, 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, 1, 1] [2020-09-04 23:20:08,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 23:20:08,743 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:08,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:08,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1503707401, now seen corresponding path program 45 times [2020-09-04 23:20:08,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:08,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919685988] [2020-09-04 23:20:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:21,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8957 backedges. 2 proven. 8955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:20:21,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919685988] [2020-09-04 23:20:21,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:21,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-09-04 23:20:21,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059085034] [2020-09-04 23:20:21,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-09-04 23:20:21,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:21,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-09-04 23:20:21,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=8512, Unknown=0, NotChecked=0, Total=8742 [2020-09-04 23:20:21,956 INFO L87 Difference]: Start difference. First operand 438 states and 440 transitions. Second operand 94 states. [2020-09-04 23:21:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:05,852 INFO L93 Difference]: Finished difference Result 881 states and 886 transitions. [2020-09-04 23:21:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-09-04 23:21:05,854 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 437 [2020-09-04 23:21:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:05,857 INFO L225 Difference]: With dead ends: 881 [2020-09-04 23:21:05,857 INFO L226 Difference]: Without dead ends: 461 [2020-09-04 23:21:05,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=685, Invalid=33355, Unknown=0, NotChecked=0, Total=34040 [2020-09-04 23:21:05,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-09-04 23:21:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 447. [2020-09-04 23:21:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-09-04 23:21:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 449 transitions. [2020-09-04 23:21:05,871 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 449 transitions. Word has length 437 [2020-09-04 23:21:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:05,871 INFO L479 AbstractCegarLoop]: Abstraction has 447 states and 449 transitions. [2020-09-04 23:21:05,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-09-04 23:21:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 449 transitions. [2020-09-04 23:21:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-09-04 23:21:05,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:05,875 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 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, 1, 1] [2020-09-04 23:21:05,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 23:21:05,875 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:05,875 INFO L82 PathProgramCache]: Analyzing trace with hash -990658060, now seen corresponding path program 46 times [2020-09-04 23:21:05,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:05,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370239414] [2020-09-04 23:21:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:21,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:21:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9363 backedges. 2 proven. 9361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:21:21,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370239414] [2020-09-04 23:21:21,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:21,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-09-04 23:21:21,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227970461] [2020-09-04 23:21:21,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-09-04 23:21:21,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:21,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-09-04 23:21:21,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=8885, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 23:21:21,308 INFO L87 Difference]: Start difference. First operand 447 states and 449 transitions. Second operand 96 states. [2020-09-04 23:22:12,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:12,579 INFO L93 Difference]: Finished difference Result 899 states and 904 transitions. [2020-09-04 23:22:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2020-09-04 23:22:12,581 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 446 [2020-09-04 23:22:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:12,584 INFO L225 Difference]: With dead ends: 899 [2020-09-04 23:22:12,584 INFO L226 Difference]: Without dead ends: 470 [2020-09-04 23:22:12,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4279 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=700, Invalid=34832, Unknown=0, NotChecked=0, Total=35532 [2020-09-04 23:22:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-09-04 23:22:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 456. [2020-09-04 23:22:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-09-04 23:22:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 458 transitions. [2020-09-04 23:22:12,599 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 458 transitions. Word has length 446 [2020-09-04 23:22:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:12,599 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 458 transitions. [2020-09-04 23:22:12,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-09-04 23:22:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 458 transitions. [2020-09-04 23:22:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-09-04 23:22:12,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:12,603 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 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, 1, 1] [2020-09-04 23:22:12,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 23:22:12,604 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:12,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2065282153, now seen corresponding path program 47 times [2020-09-04 23:22:12,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:12,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674378916] [2020-09-04 23:22:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:29,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9778 backedges. 2 proven. 9776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:22:30,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674378916] [2020-09-04 23:22:30,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:30,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-09-04 23:22:30,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105304406] [2020-09-04 23:22:30,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-09-04 23:22:30,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:30,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-09-04 23:22:30,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=9266, Unknown=0, NotChecked=0, Total=9506 [2020-09-04 23:22:30,058 INFO L87 Difference]: Start difference. First operand 456 states and 458 transitions. Second operand 98 states.