/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/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:59:31,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:59:31,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:59:31,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:59:31,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:59:31,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:59:31,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:59:31,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:59:31,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:59:31,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:59:31,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:59:31,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:59:31,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:59:31,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:59:31,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:59:31,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:59:31,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:59:31,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:59:31,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:59:31,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:59:31,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:59:31,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:59:31,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:59:31,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:59:31,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:59:31,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:59:31,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:59:31,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:59:31,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:59:31,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:59:31,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:59:31,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:59:31,686 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:59:31,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:59:31,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:59:31,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:59:31,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:59:31,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:59:31,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:59:31,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:59:31,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:59:31,689 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:59:31,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:59:31,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:59:31,689 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:59:31,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:59:31,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:59:31,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:59:31,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:59:31,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:59:31,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:59:31,691 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 22:59:32,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:59:32,028 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:59:32,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:59:32,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:59:32,033 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:59:32,034 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-22 22:59:32,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94c2477c/73a800e077c84ea79db8478aeacb183f/FLAG6638f2963 [2020-08-22 22:59:32,607 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:59:32,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-08-22 22:59:32,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94c2477c/73a800e077c84ea79db8478aeacb183f/FLAG6638f2963 [2020-08-22 22:59:33,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94c2477c/73a800e077c84ea79db8478aeacb183f [2020-08-22 22:59:33,038 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:59:33,040 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:59:33,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:33,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:59:33,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:59:33,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:33" (1/1) ... [2020-08-22 22:59:33,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@711ce249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33, skipping insertion in model container [2020-08-22 22:59:33,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:33" (1/1) ... [2020-08-22 22:59:33,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:59:33,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:59:33,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:33,297 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:59:33,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:33,337 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:59:33,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33 WrapperNode [2020-08-22 22:59:33,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:33,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:59:33,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:59:33,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:59:33,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33" (1/1) ... [2020-08-22 22:59:33,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33" (1/1) ... [2020-08-22 22:59:33,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33" (1/1) ... [2020-08-22 22:59:33,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33" (1/1) ... [2020-08-22 22:59:33,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33" (1/1) ... [2020-08-22 22:59:33,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33" (1/1) ... [2020-08-22 22:59:33,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33" (1/1) ... [2020-08-22 22:59:33,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:59:33,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:59:33,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:59:33,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:59:33,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:59:33,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:59:33,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:59:33,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 22:59:33,544 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-22 22:59:33,544 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:59:33,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:59:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 22:59:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:59:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-08-22 22:59:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 22:59:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:59:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:59:33,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:59:33,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:59:33,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:59:33,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:59:33,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:59:33,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:59:33,862 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:59:33,863 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 22:59:33,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:33 BoogieIcfgContainer [2020-08-22 22:59:33,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:59:33,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:59:33,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:59:33,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:59:33,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:59:33" (1/3) ... [2020-08-22 22:59:33,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8704d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:33, skipping insertion in model container [2020-08-22 22:59:33,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:33" (2/3) ... [2020-08-22 22:59:33,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8704d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:33, skipping insertion in model container [2020-08-22 22:59:33,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:33" (3/3) ... [2020-08-22 22:59:33,889 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-08-22 22:59:33,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:59:33,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:59:33,917 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:59:33,938 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:59:33,938 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:59:33,938 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:59:33,939 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:59:33,939 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:59:33,939 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:59:33,939 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:59:33,939 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:59:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-08-22 22:59:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 22:59:33,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:33,966 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] [2020-08-22 22:59:33,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:33,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-08-22 22:59:33,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:33,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508957194] [2020-08-22 22:59:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:34,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:34,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:34,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508957194] [2020-08-22 22:59:34,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:34,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 22:59:34,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913207802] [2020-08-22 22:59:34,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 22:59:34,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:34,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 22:59:34,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:59:34,250 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-08-22 22:59:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:34,483 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-08-22 22:59:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 22:59:34,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-08-22 22:59:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:34,498 INFO L225 Difference]: With dead ends: 94 [2020-08-22 22:59:34,498 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 22:59:34,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:59:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 22:59:34,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-08-22 22:59:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 22:59:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-08-22 22:59:34,553 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-08-22 22:59:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:34,554 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-08-22 22:59:34,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 22:59:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-08-22 22:59:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 22:59:34,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:34,559 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] [2020-08-22 22:59:34,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:59:34,560 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:34,561 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-08-22 22:59:34,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:34,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152454429] [2020-08-22 22:59:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:34,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:34,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:34,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152454429] [2020-08-22 22:59:34,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:34,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 22:59:34,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138948360] [2020-08-22 22:59:34,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:59:34,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:34,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:59:34,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:59:34,834 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-08-22 22:59:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:35,191 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-22 22:59:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:59:35,192 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-08-22 22:59:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:35,194 INFO L225 Difference]: With dead ends: 81 [2020-08-22 22:59:35,194 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 22:59:35,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:59:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 22:59:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-08-22 22:59:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 22:59:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-22 22:59:35,209 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-08-22 22:59:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:35,209 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-22 22:59:35,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:59:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-22 22:59:35,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 22:59:35,211 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:35,211 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] [2020-08-22 22:59:35,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:59:35,212 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:35,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:35,212 INFO L82 PathProgramCache]: Analyzing trace with hash -300797571, now seen corresponding path program 1 times [2020-08-22 22:59:35,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:35,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096868136] [2020-08-22 22:59:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:35,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:35,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:35,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096868136] [2020-08-22 22:59:35,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:35,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:59:35,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587063465] [2020-08-22 22:59:35,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:59:35,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:59:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:59:35,426 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-08-22 22:59:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:35,758 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-08-22 22:59:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:59:35,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-22 22:59:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:35,761 INFO L225 Difference]: With dead ends: 87 [2020-08-22 22:59:35,761 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 22:59:35,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:59:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 22:59:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-08-22 22:59:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 22:59:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-08-22 22:59:35,791 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-08-22 22:59:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:35,797 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-08-22 22:59:35,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:59:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-08-22 22:59:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 22:59:35,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:35,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:35,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:59:35,800 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:35,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1218260359, now seen corresponding path program 2 times [2020-08-22 22:59:35,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:35,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585259184] [2020-08-22 22:59:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:35,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:35,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-22 22:59:35,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585259184] [2020-08-22 22:59:35,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:35,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:59:35,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388359703] [2020-08-22 22:59:35,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:59:35,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:35,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:59:35,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:59:35,928 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-08-22 22:59:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:36,074 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-08-22 22:59:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:59:36,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-08-22 22:59:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:36,078 INFO L225 Difference]: With dead ends: 86 [2020-08-22 22:59:36,078 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 22:59:36,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:59:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 22:59:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-08-22 22:59:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 22:59:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-08-22 22:59:36,107 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-08-22 22:59:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:36,108 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-08-22 22:59:36,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:59:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-08-22 22:59:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 22:59:36,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:36,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:59:36,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:59:36,116 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:36,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash -632447720, now seen corresponding path program 1 times [2020-08-22 22:59:36,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:36,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906067488] [2020-08-22 22:59:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-22 22:59:36,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906067488] [2020-08-22 22:59:36,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:36,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:59:36,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596924887] [2020-08-22 22:59:36,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:59:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:59:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:59:36,253 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-08-22 22:59:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:36,456 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-08-22 22:59:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:59:36,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-08-22 22:59:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:36,458 INFO L225 Difference]: With dead ends: 95 [2020-08-22 22:59:36,458 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 22:59:36,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:59:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 22:59:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-08-22 22:59:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 22:59:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-08-22 22:59:36,471 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 48 [2020-08-22 22:59:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:36,472 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-08-22 22:59:36,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:59:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-08-22 22:59:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 22:59:36,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:36,473 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2020-08-22 22:59:36,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:59:36,474 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:36,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:36,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1369017959, now seen corresponding path program 2 times [2020-08-22 22:59:36,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:36,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876260492] [2020-08-22 22:59:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:36,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876260492] [2020-08-22 22:59:36,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:36,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:59:36,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385675975] [2020-08-22 22:59:36,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:59:36,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:36,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:59:36,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:59:36,842 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 11 states. [2020-08-22 22:59:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:37,192 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-08-22 22:59:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 22:59:37,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-08-22 22:59:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:37,194 INFO L225 Difference]: With dead ends: 113 [2020-08-22 22:59:37,194 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 22:59:37,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:59:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 22:59:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-22 22:59:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 22:59:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-08-22 22:59:37,206 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-08-22 22:59:37,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:37,207 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-08-22 22:59:37,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:59:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-08-22 22:59:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 22:59:37,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:37,208 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-08-22 22:59:37,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:59:37,209 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:37,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1346847595, now seen corresponding path program 3 times [2020-08-22 22:59:37,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:37,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116183119] [2020-08-22 22:59:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:37,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116183119] [2020-08-22 22:59:37,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:37,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:59:37,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615731323] [2020-08-22 22:59:37,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:59:37,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:37,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:59:37,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:59:37,598 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 13 states. [2020-08-22 22:59:38,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:38,046 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2020-08-22 22:59:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:59:38,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 22:59:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:38,048 INFO L225 Difference]: With dead ends: 119 [2020-08-22 22:59:38,048 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 22:59:38,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:59:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 22:59:38,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-08-22 22:59:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 22:59:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-08-22 22:59:38,061 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-08-22 22:59:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:38,061 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-08-22 22:59:38,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:59:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-08-22 22:59:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 22:59:38,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:38,063 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-08-22 22:59:38,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:59:38,063 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1957832047, now seen corresponding path program 4 times [2020-08-22 22:59:38,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:38,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270034325] [2020-08-22 22:59:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:38,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270034325] [2020-08-22 22:59:38,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:38,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:59:38,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943796063] [2020-08-22 22:59:38,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:59:38,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:38,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:59:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:59:38,502 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-08-22 22:59:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:38,980 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2020-08-22 22:59:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:59:38,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-08-22 22:59:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:38,982 INFO L225 Difference]: With dead ends: 125 [2020-08-22 22:59:38,982 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 22:59:38,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-08-22 22:59:38,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 22:59:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-08-22 22:59:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 22:59:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-08-22 22:59:39,001 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-08-22 22:59:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:39,004 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-08-22 22:59:39,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:59:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-08-22 22:59:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 22:59:39,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:39,006 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-08-22 22:59:39,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:59:39,006 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:39,007 INFO L82 PathProgramCache]: Analyzing trace with hash -897873011, now seen corresponding path program 5 times [2020-08-22 22:59:39,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:39,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734059716] [2020-08-22 22:59:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:39,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734059716] [2020-08-22 22:59:39,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:39,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:59:39,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930363203] [2020-08-22 22:59:39,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:59:39,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:59:39,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:59:39,509 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 17 states. [2020-08-22 22:59:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:40,106 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-08-22 22:59:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 22:59:40,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-08-22 22:59:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:40,109 INFO L225 Difference]: With dead ends: 131 [2020-08-22 22:59:40,109 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 22:59:40,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:59:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 22:59:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-08-22 22:59:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 22:59:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-08-22 22:59:40,121 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-08-22 22:59:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:40,122 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-08-22 22:59:40,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:59:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-08-22 22:59:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 22:59:40,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:40,124 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2020-08-22 22:59:40,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:59:40,124 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:40,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1891135607, now seen corresponding path program 6 times [2020-08-22 22:59:40,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:40,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853187441] [2020-08-22 22:59:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:40,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:40,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:40,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853187441] [2020-08-22 22:59:40,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:40,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 22:59:40,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168294696] [2020-08-22 22:59:40,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 22:59:40,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:40,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 22:59:40,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:59:40,750 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 19 states. [2020-08-22 22:59:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:41,496 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-08-22 22:59:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 22:59:41,496 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-08-22 22:59:41,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:41,498 INFO L225 Difference]: With dead ends: 137 [2020-08-22 22:59:41,498 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:59:41,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 22:59:41,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:59:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-08-22 22:59:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 22:59:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-08-22 22:59:41,510 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-08-22 22:59:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:41,511 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-08-22 22:59:41,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 22:59:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-08-22 22:59:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 22:59:41,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:41,512 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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] [2020-08-22 22:59:41,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:59:41,513 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1348970117, now seen corresponding path program 7 times [2020-08-22 22:59:41,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:41,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216522137] [2020-08-22 22:59:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:41,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:41,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:42,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216522137] [2020-08-22 22:59:42,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:42,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 22:59:42,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304990903] [2020-08-22 22:59:42,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 22:59:42,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:42,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 22:59:42,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:59:42,203 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 21 states. [2020-08-22 22:59:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:43,040 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-08-22 22:59:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 22:59:43,041 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-08-22 22:59:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:43,042 INFO L225 Difference]: With dead ends: 143 [2020-08-22 22:59:43,042 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 22:59:43,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 22:59:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 22:59:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-08-22 22:59:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 22:59:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-08-22 22:59:43,055 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-08-22 22:59:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:43,055 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-08-22 22:59:43,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 22:59:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-08-22 22:59:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 22:59:43,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:43,057 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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] [2020-08-22 22:59:43,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:59:43,057 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1790865279, now seen corresponding path program 8 times [2020-08-22 22:59:43,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:43,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150735507] [2020-08-22 22:59:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:43,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:43,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:43,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150735507] [2020-08-22 22:59:43,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:43,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 22:59:43,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807591421] [2020-08-22 22:59:43,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 22:59:43,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:43,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 22:59:43,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:59:43,895 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 23 states. [2020-08-22 22:59:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:44,865 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-08-22 22:59:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 22:59:44,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-08-22 22:59:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:44,868 INFO L225 Difference]: With dead ends: 149 [2020-08-22 22:59:44,868 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 22:59:44,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 22:59:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 22:59:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-08-22 22:59:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 22:59:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-08-22 22:59:44,886 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-08-22 22:59:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:44,886 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-08-22 22:59:44,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 22:59:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-08-22 22:59:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 22:59:44,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:44,888 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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] [2020-08-22 22:59:44,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:59:44,888 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:44,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1309995651, now seen corresponding path program 9 times [2020-08-22 22:59:44,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:44,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140109493] [2020-08-22 22:59:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:44,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:45,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140109493] [2020-08-22 22:59:45,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:45,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 22:59:45,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14475277] [2020-08-22 22:59:45,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 22:59:45,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 22:59:45,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-08-22 22:59:45,780 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 25 states. [2020-08-22 22:59:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:46,948 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2020-08-22 22:59:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 22:59:46,948 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-08-22 22:59:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:46,950 INFO L225 Difference]: With dead ends: 155 [2020-08-22 22:59:46,950 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 22:59:46,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 22:59:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 22:59:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-08-22 22:59:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 22:59:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-08-22 22:59:46,963 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-08-22 22:59:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:46,964 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-08-22 22:59:46,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 22:59:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-08-22 22:59:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 22:59:46,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:46,965 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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] [2020-08-22 22:59:46,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:59:46,965 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2094408327, now seen corresponding path program 10 times [2020-08-22 22:59:46,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:46,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636940323] [2020-08-22 22:59:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:47,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:47,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:47,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636940323] [2020-08-22 22:59:47,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:47,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 22:59:47,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100266682] [2020-08-22 22:59:47,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 22:59:47,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:47,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 22:59:47,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-08-22 22:59:47,977 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 27 states. [2020-08-22 22:59:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:49,082 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-08-22 22:59:49,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 22:59:49,083 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-08-22 22:59:49,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:49,084 INFO L225 Difference]: With dead ends: 161 [2020-08-22 22:59:49,084 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 22:59:49,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 22:59:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 22:59:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-08-22 22:59:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 22:59:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-08-22 22:59:49,097 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-08-22 22:59:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:49,097 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-08-22 22:59:49,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 22:59:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-08-22 22:59:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 22:59:49,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:49,099 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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] [2020-08-22 22:59:49,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:59:49,099 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:49,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:49,099 INFO L82 PathProgramCache]: Analyzing trace with hash 712228981, now seen corresponding path program 11 times [2020-08-22 22:59:49,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:49,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197060953] [2020-08-22 22:59:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:49,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:49,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:50,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197060953] [2020-08-22 22:59:50,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:50,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 22:59:50,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873977104] [2020-08-22 22:59:50,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 22:59:50,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:50,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 22:59:50,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:59:50,540 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 29 states. [2020-08-22 22:59:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:51,776 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2020-08-22 22:59:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 22:59:51,776 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-08-22 22:59:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:51,778 INFO L225 Difference]: With dead ends: 167 [2020-08-22 22:59:51,778 INFO L226 Difference]: Without dead ends: 130 [2020-08-22 22:59:51,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 22:59:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-22 22:59:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-08-22 22:59:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 22:59:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-08-22 22:59:51,792 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-08-22 22:59:51,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:51,792 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-08-22 22:59:51,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 22:59:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-08-22 22:59:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 22:59:51,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:51,794 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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] [2020-08-22 22:59:51,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:59:51,794 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:51,794 INFO L82 PathProgramCache]: Analyzing trace with hash -907118991, now seen corresponding path program 12 times [2020-08-22 22:59:51,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:51,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976761910] [2020-08-22 22:59:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:51,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:51,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:53,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976761910] [2020-08-22 22:59:53,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:53,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 22:59:53,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529380508] [2020-08-22 22:59:53,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 22:59:53,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:53,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 22:59:53,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:59:53,073 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 31 states. [2020-08-22 22:59:54,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:54,442 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2020-08-22 22:59:54,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 22:59:54,443 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 115 [2020-08-22 22:59:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:54,444 INFO L225 Difference]: With dead ends: 173 [2020-08-22 22:59:54,444 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 22:59:54,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 22:59:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 22:59:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-08-22 22:59:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 22:59:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-08-22 22:59:54,458 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-08-22 22:59:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:54,458 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-08-22 22:59:54,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 22:59:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-08-22 22:59:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 22:59:54,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:54,460 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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] [2020-08-22 22:59:54,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:59:54,460 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1081065325, now seen corresponding path program 13 times [2020-08-22 22:59:54,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:54,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467031272] [2020-08-22 22:59:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:54,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:54,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:55,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467031272] [2020-08-22 22:59:55,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:55,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 22:59:55,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470275314] [2020-08-22 22:59:55,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 22:59:55,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 22:59:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 22:59:55,830 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 33 states. [2020-08-22 22:59:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:57,457 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2020-08-22 22:59:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-22 22:59:57,458 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 121 [2020-08-22 22:59:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:57,460 INFO L225 Difference]: With dead ends: 179 [2020-08-22 22:59:57,460 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 22:59:57,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 22:59:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 22:59:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-08-22 22:59:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 22:59:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-08-22 22:59:57,476 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-08-22 22:59:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:57,477 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-08-22 22:59:57,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 22:59:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-08-22 22:59:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 22:59:57,478 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:57,478 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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] [2020-08-22 22:59:57,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:59:57,478 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash -444769431, now seen corresponding path program 14 times [2020-08-22 22:59:57,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:57,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164470671] [2020-08-22 22:59:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:57,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:57,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:59:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:59:59,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164470671] [2020-08-22 22:59:59,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:59:59,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 22:59:59,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251494607] [2020-08-22 22:59:59,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 22:59:59,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:59,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 22:59:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 22:59:59,058 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 35 states. [2020-08-22 23:00:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:00,786 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-08-22 23:00:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 23:00:00,788 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2020-08-22 23:00:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:00,789 INFO L225 Difference]: With dead ends: 185 [2020-08-22 23:00:00,789 INFO L226 Difference]: Without dead ends: 148 [2020-08-22 23:00:00,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 23:00:00,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-22 23:00:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-08-22 23:00:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 23:00:00,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-08-22 23:00:00,806 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-08-22 23:00:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:00,807 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-08-22 23:00:00,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 23:00:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-08-22 23:00:00,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 23:00:00,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:00,808 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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] [2020-08-22 23:00:00,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 23:00:00,808 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:00,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1162676837, now seen corresponding path program 15 times [2020-08-22 23:00:00,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:00,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788844063] [2020-08-22 23:00:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:00,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:02,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788844063] [2020-08-22 23:00:02,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:02,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 23:00:02,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688743298] [2020-08-22 23:00:02,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 23:00:02,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:02,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 23:00:02,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:00:02,553 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 37 states. [2020-08-22 23:00:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:04,424 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-08-22 23:00:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-08-22 23:00:04,425 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 133 [2020-08-22 23:00:04,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:04,427 INFO L225 Difference]: With dead ends: 191 [2020-08-22 23:00:04,427 INFO L226 Difference]: Without dead ends: 154 [2020-08-22 23:00:04,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 23:00:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-22 23:00:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-08-22 23:00:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 23:00:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-08-22 23:00:04,443 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-08-22 23:00:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:04,443 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-08-22 23:00:04,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 23:00:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-08-22 23:00:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-22 23:00:04,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:04,445 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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] [2020-08-22 23:00:04,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 23:00:04,445 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash -591098783, now seen corresponding path program 16 times [2020-08-22 23:00:04,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:04,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808492990] [2020-08-22 23:00:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:04,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:04,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:06,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808492990] [2020-08-22 23:00:06,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:06,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 23:00:06,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30665737] [2020-08-22 23:00:06,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 23:00:06,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 23:00:06,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:00:06,524 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 39 states. [2020-08-22 23:00:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:08,546 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-08-22 23:00:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 23:00:08,547 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 139 [2020-08-22 23:00:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:08,549 INFO L225 Difference]: With dead ends: 197 [2020-08-22 23:00:08,549 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 23:00:08,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 23:00:08,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 23:00:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-08-22 23:00:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 23:00:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-08-22 23:00:08,573 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-08-22 23:00:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:08,574 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-08-22 23:00:08,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 23:00:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-08-22 23:00:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-22 23:00:08,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:08,575 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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] [2020-08-22 23:00:08,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 23:00:08,575 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:08,576 INFO L82 PathProgramCache]: Analyzing trace with hash -713449123, now seen corresponding path program 17 times [2020-08-22 23:00:08,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:08,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708948919] [2020-08-22 23:00:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:08,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:08,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:10,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708948919] [2020-08-22 23:00:10,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:10,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 23:00:10,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582296581] [2020-08-22 23:00:10,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 23:00:10,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 23:00:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:00:10,664 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 41 states. [2020-08-22 23:00:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:12,953 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-08-22 23:00:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-08-22 23:00:12,953 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 145 [2020-08-22 23:00:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:12,955 INFO L225 Difference]: With dead ends: 203 [2020-08-22 23:00:12,955 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 23:00:12,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 23:00:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 23:00:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-08-22 23:00:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 23:00:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-08-22 23:00:12,985 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-08-22 23:00:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:12,986 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-08-22 23:00:12,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 23:00:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-08-22 23:00:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-22 23:00:12,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:12,991 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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] [2020-08-22 23:00:12,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 23:00:12,991 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:12,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1045296807, now seen corresponding path program 18 times [2020-08-22 23:00:12,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:12,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668146074] [2020-08-22 23:00:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:13,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:13,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:15,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668146074] [2020-08-22 23:00:15,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:15,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 23:00:15,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941641265] [2020-08-22 23:00:15,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 23:00:15,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:15,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 23:00:15,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 23:00:15,257 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 43 states. [2020-08-22 23:00:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:17,867 INFO L93 Difference]: Finished difference Result 209 states and 219 transitions. [2020-08-22 23:00:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-08-22 23:00:17,870 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 151 [2020-08-22 23:00:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:17,872 INFO L225 Difference]: With dead ends: 209 [2020-08-22 23:00:17,872 INFO L226 Difference]: Without dead ends: 172 [2020-08-22 23:00:17,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 23:00:17,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-08-22 23:00:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-08-22 23:00:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 23:00:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-08-22 23:00:17,890 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-08-22 23:00:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:17,891 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-08-22 23:00:17,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 23:00:17,891 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-08-22 23:00:17,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-22 23:00:17,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:17,892 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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] [2020-08-22 23:00:17,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 23:00:17,892 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:17,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1482916949, now seen corresponding path program 19 times [2020-08-22 23:00:17,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:17,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894027475] [2020-08-22 23:00:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:17,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:17,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:20,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894027475] [2020-08-22 23:00:20,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:20,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-22 23:00:20,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022374579] [2020-08-22 23:00:20,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 23:00:20,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:20,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 23:00:20,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:00:20,365 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 45 states. [2020-08-22 23:00:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:23,029 INFO L93 Difference]: Finished difference Result 215 states and 225 transitions. [2020-08-22 23:00:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-08-22 23:00:23,029 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 157 [2020-08-22 23:00:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:23,031 INFO L225 Difference]: With dead ends: 215 [2020-08-22 23:00:23,031 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 23:00:23,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 23:00:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 23:00:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-08-22 23:00:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 23:00:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-08-22 23:00:23,055 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-08-22 23:00:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:23,055 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-08-22 23:00:23,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 23:00:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-08-22 23:00:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 23:00:23,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:23,057 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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] [2020-08-22 23:00:23,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 23:00:23,058 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash 825479761, now seen corresponding path program 20 times [2020-08-22 23:00:23,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:23,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888570470] [2020-08-22 23:00:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:23,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:23,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:25,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888570470] [2020-08-22 23:00:25,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:25,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-22 23:00:25,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820887905] [2020-08-22 23:00:25,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 23:00:25,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 23:00:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 23:00:25,709 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 47 states. [2020-08-22 23:00:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:28,789 INFO L93 Difference]: Finished difference Result 221 states and 231 transitions. [2020-08-22 23:00:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-08-22 23:00:28,790 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2020-08-22 23:00:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:28,792 INFO L225 Difference]: With dead ends: 221 [2020-08-22 23:00:28,792 INFO L226 Difference]: Without dead ends: 184 [2020-08-22 23:00:28,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 23:00:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-08-22 23:00:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-08-22 23:00:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 23:00:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-08-22 23:00:28,817 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-08-22 23:00:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:28,817 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-08-22 23:00:28,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 23:00:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-08-22 23:00:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-22 23:00:28,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:28,819 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 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] [2020-08-22 23:00:28,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 23:00:28,819 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:28,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2139573427, now seen corresponding path program 21 times [2020-08-22 23:00:28,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:28,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764705289] [2020-08-22 23:00:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:28,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:28,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 1281 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:31,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764705289] [2020-08-22 23:00:31,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:31,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 23:00:31,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633295470] [2020-08-22 23:00:31,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 23:00:31,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 23:00:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 23:00:31,777 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 49 states. [2020-08-22 23:00:34,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:34,941 INFO L93 Difference]: Finished difference Result 227 states and 237 transitions. [2020-08-22 23:00:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-08-22 23:00:34,942 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-08-22 23:00:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:34,944 INFO L225 Difference]: With dead ends: 227 [2020-08-22 23:00:34,944 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 23:00:34,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 23:00:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 23:00:34,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-08-22 23:00:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 23:00:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-08-22 23:00:34,969 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-08-22 23:00:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:34,970 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-08-22 23:00:34,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 23:00:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-08-22 23:00:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-22 23:00:34,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:34,972 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 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] [2020-08-22 23:00:34,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 23:00:34,972 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash -751311031, now seen corresponding path program 22 times [2020-08-22 23:00:34,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:34,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564170625] [2020-08-22 23:00:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:35,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:35,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:38,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564170625] [2020-08-22 23:00:38,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:38,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-22 23:00:38,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889364022] [2020-08-22 23:00:38,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 23:00:38,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:38,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 23:00:38,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 23:00:38,099 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 51 states. [2020-08-22 23:00:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:41,526 INFO L93 Difference]: Finished difference Result 233 states and 243 transitions. [2020-08-22 23:00:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-08-22 23:00:41,527 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 175 [2020-08-22 23:00:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:41,529 INFO L225 Difference]: With dead ends: 233 [2020-08-22 23:00:41,529 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 23:00:41,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 23:00:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 23:00:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-08-22 23:00:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 23:00:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-08-22 23:00:41,558 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-08-22 23:00:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:41,558 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-08-22 23:00:41,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 23:00:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-08-22 23:00:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-22 23:00:41,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:41,560 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 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] [2020-08-22 23:00:41,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 23:00:41,560 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash -886624699, now seen corresponding path program 23 times [2020-08-22 23:00:41,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:41,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031957828] [2020-08-22 23:00:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:41,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:41,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:44,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031957828] [2020-08-22 23:00:44,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:44,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-22 23:00:44,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477401332] [2020-08-22 23:00:44,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 23:00:44,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:44,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 23:00:44,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 23:00:44,968 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 53 states. [2020-08-22 23:00:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:48,695 INFO L93 Difference]: Finished difference Result 239 states and 249 transitions. [2020-08-22 23:00:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-08-22 23:00:48,696 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2020-08-22 23:00:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:48,698 INFO L225 Difference]: With dead ends: 239 [2020-08-22 23:00:48,698 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 23:00:48,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 23:00:48,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 23:00:48,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-08-22 23:00:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 23:00:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-08-22 23:00:48,724 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-08-22 23:00:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:48,725 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-08-22 23:00:48,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 23:00:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-08-22 23:00:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-08-22 23:00:48,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:48,727 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 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] [2020-08-22 23:00:48,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 23:00:48,727 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:48,727 INFO L82 PathProgramCache]: Analyzing trace with hash -626243519, now seen corresponding path program 24 times [2020-08-22 23:00:48,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:48,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876652113] [2020-08-22 23:00:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:48,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 0 proven. 1680 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:00:52,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876652113] [2020-08-22 23:00:52,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:00:52,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-22 23:00:52,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649382521] [2020-08-22 23:00:52,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 23:00:52,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:52,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 23:00:52,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 23:00:52,390 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 55 states. [2020-08-22 23:00:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:56,289 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2020-08-22 23:00:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-08-22 23:00:56,289 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 187 [2020-08-22 23:00:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:56,291 INFO L225 Difference]: With dead ends: 245 [2020-08-22 23:00:56,291 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 23:00:56,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-08-22 23:00:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 23:00:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-08-22 23:00:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 23:00:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-08-22 23:00:56,329 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-08-22 23:00:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:56,329 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-08-22 23:00:56,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 23:00:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-08-22 23:00:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-08-22 23:00:56,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:56,331 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 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] [2020-08-22 23:00:56,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 23:00:56,331 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash 14480701, now seen corresponding path program 25 times [2020-08-22 23:00:56,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:56,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483872156] [2020-08-22 23:00:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:56,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:56,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:00:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 0 proven. 1825 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:00,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483872156] [2020-08-22 23:01:00,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:00,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-22 23:01:00,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511918580] [2020-08-22 23:01:00,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 23:01:00,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 23:01:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 23:01:00,346 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 57 states. [2020-08-22 23:01:04,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:04,673 INFO L93 Difference]: Finished difference Result 251 states and 261 transitions. [2020-08-22 23:01:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-08-22 23:01:04,674 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 193 [2020-08-22 23:01:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:04,677 INFO L225 Difference]: With dead ends: 251 [2020-08-22 23:01:04,677 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 23:01:04,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-08-22 23:01:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 23:01:04,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-08-22 23:01:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-22 23:01:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-08-22 23:01:04,709 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-08-22 23:01:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:04,709 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-08-22 23:01:04,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 23:01:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-08-22 23:01:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-08-22 23:01:04,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:04,711 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 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] [2020-08-22 23:01:04,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 23:01:04,711 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:04,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2055277255, now seen corresponding path program 26 times [2020-08-22 23:01:04,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:04,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516777558] [2020-08-22 23:01:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:04,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:04,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1976 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:08,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516777558] [2020-08-22 23:01:08,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:08,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-22 23:01:08,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818514189] [2020-08-22 23:01:08,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-22 23:01:08,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-22 23:01:08,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 23:01:08,947 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 59 states. [2020-08-22 23:01:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:13,507 INFO L93 Difference]: Finished difference Result 257 states and 267 transitions. [2020-08-22 23:01:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-08-22 23:01:13,507 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 199 [2020-08-22 23:01:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:13,509 INFO L225 Difference]: With dead ends: 257 [2020-08-22 23:01:13,509 INFO L226 Difference]: Without dead ends: 220 [2020-08-22 23:01:13,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-08-22 23:01:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-22 23:01:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-08-22 23:01:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 23:01:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-08-22 23:01:13,545 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-08-22 23:01:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:13,545 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-08-22 23:01:13,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-22 23:01:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-08-22 23:01:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 23:01:13,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:13,547 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 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] [2020-08-22 23:01:13,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 23:01:13,547 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:13,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1257764811, now seen corresponding path program 27 times [2020-08-22 23:01:13,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:13,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80602857] [2020-08-22 23:01:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:13,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:13,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 0 proven. 2133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:18,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80602857] [2020-08-22 23:01:18,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:18,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-08-22 23:01:18,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113821353] [2020-08-22 23:01:18,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-22 23:01:18,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:18,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-22 23:01:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 23:01:18,132 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 61 states. [2020-08-22 23:01:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:23,145 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2020-08-22 23:01:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-08-22 23:01:23,146 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 205 [2020-08-22 23:01:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:23,148 INFO L225 Difference]: With dead ends: 263 [2020-08-22 23:01:23,148 INFO L226 Difference]: Without dead ends: 226 [2020-08-22 23:01:23,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-08-22 23:01:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-22 23:01:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-08-22 23:01:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-22 23:01:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-08-22 23:01:23,180 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-08-22 23:01:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:23,180 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-08-22 23:01:23,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-22 23:01:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-08-22 23:01:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-08-22 23:01:23,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:23,182 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 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] [2020-08-22 23:01:23,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 23:01:23,182 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:23,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1667371471, now seen corresponding path program 28 times [2020-08-22 23:01:23,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:23,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875968702] [2020-08-22 23:01:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:23,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:23,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 2296 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:28,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875968702] [2020-08-22 23:01:28,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:28,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-08-22 23:01:28,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409433017] [2020-08-22 23:01:28,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-08-22 23:01:28,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:28,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-08-22 23:01:28,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 23:01:28,127 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 63 states. [2020-08-22 23:01:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:33,495 INFO L93 Difference]: Finished difference Result 269 states and 279 transitions. [2020-08-22 23:01:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-08-22 23:01:33,496 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 211 [2020-08-22 23:01:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:33,498 INFO L225 Difference]: With dead ends: 269 [2020-08-22 23:01:33,498 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 23:01:33,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-08-22 23:01:33,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 23:01:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-08-22 23:01:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-08-22 23:01:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-08-22 23:01:33,526 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-08-22 23:01:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:33,527 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-08-22 23:01:33,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-08-22 23:01:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-08-22 23:01:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-08-22 23:01:33,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:33,528 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 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] [2020-08-22 23:01:33,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 23:01:33,528 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:33,529 INFO L82 PathProgramCache]: Analyzing trace with hash -971610323, now seen corresponding path program 29 times [2020-08-22 23:01:33,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:33,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611247610] [2020-08-22 23:01:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:33,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:33,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 0 proven. 2465 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:38,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611247610] [2020-08-22 23:01:38,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:38,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-08-22 23:01:38,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127618213] [2020-08-22 23:01:38,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-08-22 23:01:38,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-08-22 23:01:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 23:01:38,909 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 65 states. [2020-08-22 23:01:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:44,703 INFO L93 Difference]: Finished difference Result 275 states and 285 transitions. [2020-08-22 23:01:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-08-22 23:01:44,704 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 217 [2020-08-22 23:01:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:44,706 INFO L225 Difference]: With dead ends: 275 [2020-08-22 23:01:44,706 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 23:01:44,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-08-22 23:01:44,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 23:01:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-08-22 23:01:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-22 23:01:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-08-22 23:01:44,734 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-08-22 23:01:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:44,735 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-08-22 23:01:44,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-08-22 23:01:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-08-22 23:01:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-08-22 23:01:44,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:44,736 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 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] [2020-08-22 23:01:44,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 23:01:44,736 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash -201903319, now seen corresponding path program 30 times [2020-08-22 23:01:44,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:44,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237026817] [2020-08-22 23:01:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:44,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:44,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2649 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:01:50,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237026817] [2020-08-22 23:01:50,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:50,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-08-22 23:01:50,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651346375] [2020-08-22 23:01:50,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-08-22 23:01:50,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:50,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-08-22 23:01:50,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 23:01:50,566 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 67 states. [2020-08-22 23:01:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:56,819 INFO L93 Difference]: Finished difference Result 281 states and 291 transitions. [2020-08-22 23:01:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-08-22 23:01:56,820 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 223 [2020-08-22 23:01:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:56,822 INFO L225 Difference]: With dead ends: 281 [2020-08-22 23:01:56,822 INFO L226 Difference]: Without dead ends: 244 [2020-08-22 23:01:56,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-08-22 23:01:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-22 23:01:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-08-22 23:01:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-22 23:01:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-08-22 23:01:56,861 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-08-22 23:01:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:56,862 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-08-22 23:01:56,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-08-22 23:01:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-08-22 23:01:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-08-22 23:01:56,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:56,863 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 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] [2020-08-22 23:01:56,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 23:01:56,863 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:56,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:56,863 INFO L82 PathProgramCache]: Analyzing trace with hash -579464667, now seen corresponding path program 31 times [2020-08-22 23:01:56,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:56,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304267925] [2020-08-22 23:01:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:56,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:56,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:01:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:02:03,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304267925] [2020-08-22 23:02:03,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:03,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-08-22 23:02:03,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116243440] [2020-08-22 23:02:03,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-08-22 23:02:03,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-08-22 23:02:03,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 23:02:03,013 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 69 states. [2020-08-22 23:02:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:09,801 INFO L93 Difference]: Finished difference Result 287 states and 297 transitions. [2020-08-22 23:02:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-08-22 23:02:09,802 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 229 [2020-08-22 23:02:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:09,804 INFO L225 Difference]: With dead ends: 287 [2020-08-22 23:02:09,804 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 23:02:09,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-08-22 23:02:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 23:02:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-08-22 23:02:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 23:02:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-08-22 23:02:09,842 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-08-22 23:02:09,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:09,842 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-08-22 23:02:09,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-08-22 23:02:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-08-22 23:02:09,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-08-22 23:02:09,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:09,844 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 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] [2020-08-22 23:02:09,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 23:02:09,844 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:09,844 INFO L82 PathProgramCache]: Analyzing trace with hash -361184223, now seen corresponding path program 32 times [2020-08-22 23:02:09,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:09,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131187946] [2020-08-22 23:02:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:02:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 0 proven. 3008 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:02:16,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131187946] [2020-08-22 23:02:16,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:16,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-08-22 23:02:16,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250837783] [2020-08-22 23:02:16,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-08-22 23:02:16,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-08-22 23:02:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 23:02:16,329 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 71 states. [2020-08-22 23:02:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:23,939 INFO L93 Difference]: Finished difference Result 293 states and 303 transitions. [2020-08-22 23:02:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-08-22 23:02:23,940 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 235 [2020-08-22 23:02:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:23,942 INFO L225 Difference]: With dead ends: 293 [2020-08-22 23:02:23,942 INFO L226 Difference]: Without dead ends: 256 [2020-08-22 23:02:23,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-08-22 23:02:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-22 23:02:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-08-22 23:02:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-08-22 23:02:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-08-22 23:02:23,973 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-08-22 23:02:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:23,973 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-08-22 23:02:23,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-08-22 23:02:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-08-22 23:02:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-08-22 23:02:23,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:23,975 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 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] [2020-08-22 23:02:23,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 23:02:23,975 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash -275445475, now seen corresponding path program 33 times [2020-08-22 23:02:23,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:23,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912796397] [2020-08-22 23:02:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:24,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:24,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:02:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3201 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:02:31,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912796397] [2020-08-22 23:02:31,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:31,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-08-22 23:02:31,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435723366] [2020-08-22 23:02:31,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-08-22 23:02:31,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-08-22 23:02:31,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 23:02:31,161 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 73 states. [2020-08-22 23:02:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:39,053 INFO L93 Difference]: Finished difference Result 299 states and 309 transitions. [2020-08-22 23:02:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-08-22 23:02:39,054 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 241 [2020-08-22 23:02:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:39,056 INFO L225 Difference]: With dead ends: 299 [2020-08-22 23:02:39,056 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 23:02:39,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-08-22 23:02:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 23:02:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-08-22 23:02:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 23:02:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-08-22 23:02:39,101 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-08-22 23:02:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:39,101 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-08-22 23:02:39,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-08-22 23:02:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-08-22 23:02:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-08-22 23:02:39,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:39,103 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 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] [2020-08-22 23:02:39,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 23:02:39,104 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:39,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:39,104 INFO L82 PathProgramCache]: Analyzing trace with hash -368008935, now seen corresponding path program 34 times [2020-08-22 23:02:39,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:39,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526207773] [2020-08-22 23:02:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:39,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:39,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:02:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3409 backedges. 0 proven. 3400 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:02:46,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526207773] [2020-08-22 23:02:46,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:46,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-08-22 23:02:46,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819081733] [2020-08-22 23:02:46,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-08-22 23:02:46,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-08-22 23:02:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 23:02:46,809 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 75 states. [2020-08-22 23:02:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:55,340 INFO L93 Difference]: Finished difference Result 305 states and 315 transitions. [2020-08-22 23:02:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-08-22 23:02:55,342 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 247 [2020-08-22 23:02:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:55,344 INFO L225 Difference]: With dead ends: 305 [2020-08-22 23:02:55,344 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 23:02:55,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-08-22 23:02:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 23:02:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-08-22 23:02:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-22 23:02:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-08-22 23:02:55,398 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-08-22 23:02:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:55,398 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-08-22 23:02:55,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-08-22 23:02:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-08-22 23:02:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-08-22 23:02:55,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:55,400 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 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] [2020-08-22 23:02:55,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 23:02:55,401 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:55,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1142862827, now seen corresponding path program 35 times [2020-08-22 23:02:55,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:55,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959520264] [2020-08-22 23:02:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:55,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:55,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:02:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3614 backedges. 0 proven. 3605 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:03:03,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959520264] [2020-08-22 23:03:03,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:03,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-08-22 23:03:03,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132901827] [2020-08-22 23:03:03,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-08-22 23:03:03,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:03,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-08-22 23:03:03,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 23:03:03,603 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 77 states. [2020-08-22 23:03:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:12,941 INFO L93 Difference]: Finished difference Result 311 states and 321 transitions. [2020-08-22 23:03:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-08-22 23:03:12,942 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 253 [2020-08-22 23:03:12,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:12,944 INFO L225 Difference]: With dead ends: 311 [2020-08-22 23:03:12,944 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 23:03:12,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-08-22 23:03:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 23:03:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-08-22 23:03:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-22 23:03:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-08-22 23:03:13,000 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-08-22 23:03:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:13,000 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-08-22 23:03:13,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-08-22 23:03:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-08-22 23:03:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-08-22 23:03:13,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:13,003 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 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] [2020-08-22 23:03:13,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 23:03:13,003 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:13,004 INFO L82 PathProgramCache]: Analyzing trace with hash -408106479, now seen corresponding path program 36 times [2020-08-22 23:03:13,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:13,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484858915] [2020-08-22 23:03:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:13,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:13,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:03:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:03:22,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484858915] [2020-08-22 23:03:22,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:22,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-08-22 23:03:22,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76187799] [2020-08-22 23:03:22,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-08-22 23:03:22,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:22,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-08-22 23:03:22,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 23:03:22,370 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 79 states. [2020-08-22 23:03:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:32,165 INFO L93 Difference]: Finished difference Result 317 states and 327 transitions. [2020-08-22 23:03:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-08-22 23:03:32,166 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 259 [2020-08-22 23:03:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:32,168 INFO L225 Difference]: With dead ends: 317 [2020-08-22 23:03:32,168 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 23:03:32,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-08-22 23:03:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 23:03:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-08-22 23:03:32,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 23:03:32,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-08-22 23:03:32,228 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-08-22 23:03:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:32,228 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-08-22 23:03:32,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-08-22 23:03:32,228 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-08-22 23:03:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-08-22 23:03:32,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:32,230 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 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] [2020-08-22 23:03:32,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 23:03:32,231 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:32,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:32,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1288231693, now seen corresponding path program 37 times [2020-08-22 23:03:32,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:32,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970216975] [2020-08-22 23:03:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:32,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:32,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:03:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4042 backedges. 0 proven. 4033 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:03:42,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970216975] [2020-08-22 23:03:42,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:42,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-08-22 23:03:42,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528009396] [2020-08-22 23:03:42,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-08-22 23:03:42,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:42,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-08-22 23:03:42,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 23:03:42,079 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 81 states. [2020-08-22 23:03:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:52,811 INFO L93 Difference]: Finished difference Result 323 states and 333 transitions. [2020-08-22 23:03:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-08-22 23:03:52,814 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 265 [2020-08-22 23:03:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:52,815 INFO L225 Difference]: With dead ends: 323 [2020-08-22 23:03:52,815 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 23:03:52,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-08-22 23:03:52,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 23:03:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-08-22 23:03:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-22 23:03:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-08-22 23:03:52,862 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-08-22 23:03:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:52,862 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-08-22 23:03:52,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-08-22 23:03:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-08-22 23:03:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-08-22 23:03:52,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:52,864 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 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] [2020-08-22 23:03:52,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 23:03:52,865 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:52,865 INFO L82 PathProgramCache]: Analyzing trace with hash -482656503, now seen corresponding path program 38 times [2020-08-22 23:03:52,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:52,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415003207] [2020-08-22 23:03:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:52,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:52,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:03:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 0 proven. 4256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:04:03,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415003207] [2020-08-22 23:04:03,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:03,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-08-22 23:04:03,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543512675] [2020-08-22 23:04:03,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-08-22 23:04:03,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-08-22 23:04:03,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 23:04:03,128 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 83 states. [2020-08-22 23:04:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:14,223 INFO L93 Difference]: Finished difference Result 329 states and 339 transitions. [2020-08-22 23:04:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-08-22 23:04:14,224 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 271 [2020-08-22 23:04:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:14,226 INFO L225 Difference]: With dead ends: 329 [2020-08-22 23:04:14,226 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 23:04:14,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-08-22 23:04:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 23:04:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-08-22 23:04:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-08-22 23:04:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-08-22 23:04:14,281 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-08-22 23:04:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:14,281 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-08-22 23:04:14,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-08-22 23:04:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-08-22 23:04:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-08-22 23:04:14,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:14,283 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 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] [2020-08-22 23:04:14,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 23:04:14,283 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2008659461, now seen corresponding path program 39 times [2020-08-22 23:04:14,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:14,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355657040] [2020-08-22 23:04:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:14,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:14,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:04:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4494 backedges. 0 proven. 4485 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:04:25,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355657040] [2020-08-22 23:04:25,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:25,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-08-22 23:04:25,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385132647] [2020-08-22 23:04:25,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-08-22 23:04:25,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-08-22 23:04:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 23:04:25,543 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 85 states. [2020-08-22 23:04:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:38,912 INFO L93 Difference]: Finished difference Result 335 states and 345 transitions. [2020-08-22 23:04:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-08-22 23:04:38,913 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 277 [2020-08-22 23:04:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:38,915 INFO L225 Difference]: With dead ends: 335 [2020-08-22 23:04:38,915 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 23:04:38,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-08-22 23:04:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 23:04:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-08-22 23:04:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-08-22 23:04:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-08-22 23:04:38,976 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-08-22 23:04:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:38,976 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-08-22 23:04:38,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-08-22 23:04:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-08-22 23:04:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-08-22 23:04:38,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:38,978 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 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] [2020-08-22 23:04:38,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 23:04:38,979 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1739194369, now seen corresponding path program 40 times [2020-08-22 23:04:38,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:38,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222672091] [2020-08-22 23:04:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:04:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 0 proven. 4720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:04:51,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222672091] [2020-08-22 23:04:51,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:51,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-08-22 23:04:51,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362055360] [2020-08-22 23:04:51,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-08-22 23:04:51,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:51,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-08-22 23:04:51,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 23:04:51,713 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 87 states. [2020-08-22 23:05:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:06,170 INFO L93 Difference]: Finished difference Result 341 states and 351 transitions. [2020-08-22 23:05:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-08-22 23:05:06,171 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 283 [2020-08-22 23:05:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:06,173 INFO L225 Difference]: With dead ends: 341 [2020-08-22 23:05:06,173 INFO L226 Difference]: Without dead ends: 304 [2020-08-22 23:05:06,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-08-22 23:05:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-22 23:05:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-08-22 23:05:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-08-22 23:05:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-08-22 23:05:06,235 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-08-22 23:05:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:06,236 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-08-22 23:05:06,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-08-22 23:05:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-08-22 23:05:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-08-22 23:05:06,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:06,238 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 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] [2020-08-22 23:05:06,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 23:05:06,238 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:06,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1562500349, now seen corresponding path program 41 times [2020-08-22 23:05:06,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:06,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985370145] [2020-08-22 23:05:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:06,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:06,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:05:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4961 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:05:20,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985370145] [2020-08-22 23:05:20,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:20,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-08-22 23:05:20,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003765187] [2020-08-22 23:05:20,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-08-22 23:05:20,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-08-22 23:05:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 23:05:20,090 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 89 states. [2020-08-22 23:05:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:37,267 INFO L93 Difference]: Finished difference Result 347 states and 357 transitions. [2020-08-22 23:05:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-08-22 23:05:37,268 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 289 [2020-08-22 23:05:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:37,269 INFO L225 Difference]: With dead ends: 347 [2020-08-22 23:05:37,269 INFO L226 Difference]: Without dead ends: 310 [2020-08-22 23:05:37,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-08-22 23:05:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-08-22 23:05:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-08-22 23:05:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 23:05:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-08-22 23:05:37,341 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-08-22 23:05:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:37,342 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-08-22 23:05:37,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-08-22 23:05:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-08-22 23:05:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-08-22 23:05:37,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:37,344 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 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] [2020-08-22 23:05:37,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 23:05:37,344 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:37,345 INFO L82 PathProgramCache]: Analyzing trace with hash 182914297, now seen corresponding path program 42 times [2020-08-22 23:05:37,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:37,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497338277] [2020-08-22 23:05:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:37,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:37,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:05:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5217 backedges. 0 proven. 5208 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:05:53,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497338277] [2020-08-22 23:05:53,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:53,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-08-22 23:05:53,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620832235] [2020-08-22 23:05:53,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-08-22 23:05:53,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:53,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-08-22 23:05:53,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 23:05:53,299 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 91 states. [2020-08-22 23:06:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:10,365 INFO L93 Difference]: Finished difference Result 353 states and 363 transitions. [2020-08-22 23:06:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-08-22 23:06:10,368 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 295 [2020-08-22 23:06:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:10,370 INFO L225 Difference]: With dead ends: 353 [2020-08-22 23:06:10,370 INFO L226 Difference]: Without dead ends: 316 [2020-08-22 23:06:10,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-08-22 23:06:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-08-22 23:06:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-08-22 23:06:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-22 23:06:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-08-22 23:06:10,438 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-08-22 23:06:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:10,439 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-08-22 23:06:10,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-08-22 23:06:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-08-22 23:06:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-08-22 23:06:10,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:10,441 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 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] [2020-08-22 23:06:10,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 23:06:10,441 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:10,442 INFO L82 PathProgramCache]: Analyzing trace with hash -395358219, now seen corresponding path program 43 times [2020-08-22 23:06:10,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:10,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730978246] [2020-08-22 23:06:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:10,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:10,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:06:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:12,178 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:06:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5470 backedges. 0 proven. 5461 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:06:28,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730978246] [2020-08-22 23:06:28,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:28,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-08-22 23:06:28,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019671274] [2020-08-22 23:06:28,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-08-22 23:06:28,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:28,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-08-22 23:06:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 23:06:28,563 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 93 states. [2020-08-22 23:06:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:50,342 INFO L93 Difference]: Finished difference Result 359 states and 369 transitions. [2020-08-22 23:06:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-08-22 23:06:50,345 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 301 [2020-08-22 23:06:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:50,347 INFO L225 Difference]: With dead ends: 359 [2020-08-22 23:06:50,347 INFO L226 Difference]: Without dead ends: 322 [2020-08-22 23:06:50,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-08-22 23:06:50,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-22 23:06:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-08-22 23:06:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-08-22 23:06:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-08-22 23:06:50,425 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-08-22 23:06:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:50,425 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-08-22 23:06:50,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-08-22 23:06:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-08-22 23:06:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-08-22 23:06:50,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:50,428 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 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] [2020-08-22 23:06:50,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 23:06:50,428 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash -304060943, now seen corresponding path program 44 times [2020-08-22 23:06:50,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:50,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006851910] [2020-08-22 23:06:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:50,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:50,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:06:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 0 proven. 5720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:07:13,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006851910] [2020-08-22 23:07:13,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:13,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-08-22 23:07:13,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403090345] [2020-08-22 23:07:13,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-08-22 23:07:13,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:13,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-08-22 23:07:13,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 23:07:13,754 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 95 states. [2020-08-22 23:07:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:41,461 INFO L93 Difference]: Finished difference Result 365 states and 375 transitions. [2020-08-22 23:07:41,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-08-22 23:07:41,465 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 307 [2020-08-22 23:07:41,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:41,468 INFO L225 Difference]: With dead ends: 365 [2020-08-22 23:07:41,468 INFO L226 Difference]: Without dead ends: 328 [2020-08-22 23:07:41,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-08-22 23:07:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-22 23:07:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-08-22 23:07:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 23:07:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-08-22 23:07:41,556 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-08-22 23:07:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:41,557 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-08-22 23:07:41,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-08-22 23:07:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-08-22 23:07:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-08-22 23:07:41,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:41,560 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 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] [2020-08-22 23:07:41,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 23:07:41,560 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1343229677, now seen corresponding path program 45 times [2020-08-22 23:07:41,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:41,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544827096] [2020-08-22 23:07:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:41,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:41,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:07:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:42,820 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:07:56,935 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:08,350 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:08,937 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:12,302 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:08:12,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544827096] [2020-08-22 23:08:12,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:12,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-08-22 23:08:12,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172294487] [2020-08-22 23:08:12,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-08-22 23:08:12,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:12,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-08-22 23:08:12,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 23:08:12,783 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 97 states. [2020-08-22 23:08:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:50,188 INFO L93 Difference]: Finished difference Result 371 states and 381 transitions. [2020-08-22 23:08:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-08-22 23:08:50,192 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 313 [2020-08-22 23:08:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:50,194 INFO L225 Difference]: With dead ends: 371 [2020-08-22 23:08:50,194 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 23:08:50,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-08-22 23:08:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 23:08:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-08-22 23:08:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-08-22 23:08:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-08-22 23:08:50,276 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-08-22 23:08:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:50,277 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-08-22 23:08:50,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-08-22 23:08:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-08-22 23:08:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-08-22 23:08:50,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:50,280 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 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] [2020-08-22 23:08:50,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 23:08:50,280 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1015286505, now seen corresponding path program 46 times [2020-08-22 23:08:50,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:50,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369754013] [2020-08-22 23:08:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:50,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:50,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:08:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:50,760 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:50,927 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:51,090 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:51,257 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:51,431 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:51,613 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:51,796 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:51,984 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:52,183 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:52,387 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:52,602 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:52,816 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:53,043 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:53,267 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:53,507 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:53,743 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:53,991 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:54,242 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:54,500 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:54,757 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:55,026 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:55,302 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:55,589 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:55,876 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:56,168 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:56,468 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:56,771 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:57,085 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:57,383 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:57,722 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:58,056 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:58,393 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:58,739 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:59,087 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:59,450 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:08:59,815 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:00,184 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:00,566 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:00,951 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:01,337 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:01,736 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:02,140 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:02,574 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:02,988 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:03,405 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:03,795 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:04,207 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:04,665 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:05,128 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:05,583 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:06,052 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:06,531 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:07,013 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:07,460 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:07,915 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:08,393 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:08,890 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:09,848 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:10,385 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:10,925 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:11,480 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:12,044 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:12,614 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:13,177 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:13,752 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:14,336 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:14,926 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:15,517 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:16,122 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:16,749 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:17,361 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:17,967 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:18,599 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:19,242 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:19,820 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:20,392 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:20,955 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:21,525 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:22,098 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:22,679 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:23,265 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:23,892 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:24,586 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:25,289 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:25,998 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:26,701 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:27,406 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:28,125 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:28,856 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:29,585 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:30,347 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:31,102 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:09:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6265 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:09:31,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369754013] [2020-08-22 23:09:31,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:31,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-08-22 23:09:31,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836740394] [2020-08-22 23:09:31,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-08-22 23:09:31,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:31,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-08-22 23:09:31,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 23:09:31,597 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 99 states. [2020-08-22 23:10:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:16,396 INFO L93 Difference]: Finished difference Result 377 states and 387 transitions. [2020-08-22 23:10:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-08-22 23:10:16,401 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 319 [2020-08-22 23:10:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:16,404 INFO L225 Difference]: With dead ends: 377 [2020-08-22 23:10:16,404 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 23:10:16,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 81.6s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-08-22 23:10:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 23:10:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-08-22 23:10:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-22 23:10:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-08-22 23:10:16,483 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-08-22 23:10:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:16,484 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-08-22 23:10:16,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-08-22 23:10:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-08-22 23:10:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-08-22 23:10:16,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:16,486 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 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] [2020-08-22 23:10:16,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 23:10:16,487 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:16,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:16,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1787684379, now seen corresponding path program 47 times [2020-08-22 23:10:16,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:16,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925356774] [2020-08-22 23:10:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:16,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:10:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:16,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:10:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:17,077 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:17,267 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:17,469 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:17,670 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:17,879 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:18,101 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:18,330 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:18,540 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:18,753 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:18,991 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:19,230 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:19,468 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:19,734 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:20,007 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:20,285 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:20,568 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:20,847 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:21,096 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:21,381 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:21,708 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:22,039 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:22,378 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:22,730 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:23,087 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:23,456 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:23,823 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:24,208 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:24,598 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:24,988 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:25,390 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:25,803 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:26,216 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:26,636 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:27,060 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:27,527 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:27,972 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:28,417 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:28,876 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:29,349 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:29,812 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:30,292 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:30,790 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:31,290 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:31,771 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:32,293 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:32,842 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:33,379 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:33,917 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:34,461 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:34,953 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:35,438 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:35,918 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:36,411 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:36,909 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:37,408 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:37,912 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:38,426 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:38,952 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:39,487 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:40,087 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:40,721 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:41,374 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:42,028 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:42,686 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:43,357 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:44,016 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:44,706 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:45,393 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:46,082 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:46,773 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:47,476 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:48,199 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:48,919 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:49,654 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:50,398 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:51,151 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:51,915 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:52,678 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:53,449 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:54,226 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:55,018 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:55,810 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:56,621 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:57,428 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:58,249 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:59,078 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:10:59,916 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:00,752 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:01,604 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:02,466 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:03,234 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:04,165 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:05,025 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:05,968 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:06,929 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:11:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6542 backedges. 0 proven. 6533 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:11:07,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925356774] [2020-08-22 23:11:07,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:07,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-08-22 23:11:07,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80145135] [2020-08-22 23:11:07,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-08-22 23:11:07,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:07,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-08-22 23:11:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 23:11:07,452 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 101 states. [2020-08-22 23:11:09,335 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-08-22 23:11:10,285 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:11,607 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:12,047 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:13,026 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:13,567 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:13,859 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:14,146 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:14,453 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:14,758 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:16,774 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:24,198 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:24,728 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:25,280 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:25,821 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:26,892 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:27,480 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:28,054 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:29,857 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:30,468 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:31,123 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:32,400 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:33,709 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:36,414 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:37,119 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:37,845 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:38,571 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:39,319 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:40,057 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:40,819 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:41,578 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:42,351 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:43,127 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:43,922 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:44,711 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:45,520 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:46,325 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:47,166 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:47,989 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:48,742 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:49,604 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:50,497 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:51,371 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:52,270 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:53,174 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:55,685 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:57,453 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:11:58,420 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-08-22 23:11:59,408 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-08-22 23:12:00,532 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-08-22 23:12:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:12:01,303 INFO L93 Difference]: Finished difference Result 383 states and 393 transitions. [2020-08-22 23:12:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-08-22 23:12:01,310 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 325 [2020-08-22 23:12:01,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:12:01,313 INFO L225 Difference]: With dead ends: 383 [2020-08-22 23:12:01,313 INFO L226 Difference]: Without dead ends: 346 [2020-08-22 23:12:01,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7194 ImplicationChecksByTransitivity, 99.6s TimeCoverageRelationStatistics Valid=11973, Invalid=27429, Unknown=0, NotChecked=0, Total=39402 [2020-08-22 23:12:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-08-22 23:12:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-08-22 23:12:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-08-22 23:12:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-08-22 23:12:01,447 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 325 [2020-08-22 23:12:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:12:01,449 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-08-22 23:12:01,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-08-22 23:12:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-08-22 23:12:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-08-22 23:12:01,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:12:01,454 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 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] [2020-08-22 23:12:01,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 23:12:01,455 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:12:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:12:01,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1379927071, now seen corresponding path program 48 times [2020-08-22 23:12:01,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:12:01,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657515872] [2020-08-22 23:12:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:12:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:01,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:12:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:01,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 23:12:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:02,149 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:02,375 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:02,598 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:02,830 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:03,076 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:03,327 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:03,590 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:03,849 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:04,116 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:04,406 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:04,688 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:04,995 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:05,310 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:05,629 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:05,949 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:06,284 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:06,624 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:06,978 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:07,347 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:07,705 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:08,078 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:08,468 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:08,860 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:09,262 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:09,673 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:10,095 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:10,522 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:10,965 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:11,414 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:11,858 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:12,319 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:12,784 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:13,272 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:13,720 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:14,159 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:14,621 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:15,105 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:15,560 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:16,028 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:16,500 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:16,972 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:17,454 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:17,938 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:18,435 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:18,939 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:19,449 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:19,991 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:20,586 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:21,208 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:21,848 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:22,489 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:23,136 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:23,805 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:24,473 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:25,152 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:25,841 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:26,527 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:27,229 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:27,953 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:28,667 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:29,398 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:30,120 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:30,863 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:31,610 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:32,363 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:33,122 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:33,900 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:34,679 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:35,476 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:36,292 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:37,107 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:37,921 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:38,754 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:39,589 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:40,419 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:41,278 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:42,138 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:43,014 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:43,901 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:44,791 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:45,685 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:46,593 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:47,512 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:48,439 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:49,308 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:50,193 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:51,099 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:52,102 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:53,111 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:54,140 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:55,191 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:56,185 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:57,233 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:58,291 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:12:59,376 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:13:00,464 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-08-22 23:13:01,554 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12