/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-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:03:25,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:03:25,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:03:25,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-17 18:03:25,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:03:25,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:03:25,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:03:25,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:03:25,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:03:25,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:03:25,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:03:25,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:03:25,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:03:25,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:03:25,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:03:25,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:03:25,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 18:03:25,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:03:25,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:03:25,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:03:25,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:03:25,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:03:25,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:03:25,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:03:25,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:03:25,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:03:25,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:03:25,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:03:25,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:03:25,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:03:25,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:03:25,899 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:03:25,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:03:25,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:03:25,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:03:25,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:03:25,900 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:03:25,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:03:25,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:03:25,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:03:25,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:03:25,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:03:25,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:03:25,902 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 [2020-07-17 18:03:26,228 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:03:26,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:03:26,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:03:26,258 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:03:26,258 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:03:26,259 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-07-17 18:03:26,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ec7def5b/2761eaaaf48b41c18f3682acbdc8545a/FLAGe268b1c46 [2020-07-17 18:03:26,779 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:03:26,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-07-17 18:03:26,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ec7def5b/2761eaaaf48b41c18f3682acbdc8545a/FLAGe268b1c46 [2020-07-17 18:03:27,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ec7def5b/2761eaaaf48b41c18f3682acbdc8545a [2020-07-17 18:03:27,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:03:27,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:03:27,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:03:27,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:03:27,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:03:27,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:03:27" (1/1) ... [2020-07-17 18:03:27,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bafe460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27, skipping insertion in model container [2020-07-17 18:03:27,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:03:27" (1/1) ... [2020-07-17 18:03:27,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:03:27,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:03:27,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:03:27,475 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:03:27,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:03:27,522 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:03:27,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27 WrapperNode [2020-07-17 18:03:27,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:03:27,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:03:27,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:03:27,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:03:27,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27" (1/1) ... [2020-07-17 18:03:27,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27" (1/1) ... [2020-07-17 18:03:27,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27" (1/1) ... [2020-07-17 18:03:27,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27" (1/1) ... [2020-07-17 18:03:27,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27" (1/1) ... [2020-07-17 18:03:27,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27" (1/1) ... [2020-07-17 18:03:27,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27" (1/1) ... [2020-07-17 18:03:27,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:03:27,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:03:27,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:03:27,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:03:27,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27" (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 [2020-07-17 18:03:27,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:03:27,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:03:27,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:03:27,745 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-07-17 18:03:27,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:03:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 18:03:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:03:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:03:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-17 18:03:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 18:03:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 18:03:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:03:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 18:03:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 18:03:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 18:03:27,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:03:27,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:03:28,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:03:28,050 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 18:03:28,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:03:28 BoogieIcfgContainer [2020-07-17 18:03:28,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:03:28,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:03:28,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:03:28,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:03:28,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:03:27" (1/3) ... [2020-07-17 18:03:28,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c27907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:03:28, skipping insertion in model container [2020-07-17 18:03:28,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:27" (2/3) ... [2020-07-17 18:03:28,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c27907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:03:28, skipping insertion in model container [2020-07-17 18:03:28,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:03:28" (3/3) ... [2020-07-17 18:03:28,076 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-07-17 18:03:28,088 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:03:28,095 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:03:28,121 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:03:28,140 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:03:28,141 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:03:28,141 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:03:28,141 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:03:28,141 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:03:28,141 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:03:28,142 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:03:28,142 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:03:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-07-17 18:03:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 18:03:28,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:28,169 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] [2020-07-17 18:03:28,169 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:28,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-07-17 18:03:28,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:28,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35730158] [2020-07-17 18:03:28,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:03:28,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35730158] [2020-07-17 18:03:28,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:03:28,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 18:03:28,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494861202] [2020-07-17 18:03:28,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 18:03:28,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:28,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 18:03:28,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 18:03:28,472 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-07-17 18:03:28,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:28,679 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-07-17 18:03:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 18:03:28,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-07-17 18:03:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:28,692 INFO L225 Difference]: With dead ends: 94 [2020-07-17 18:03:28,692 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 18:03:28,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:03:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 18:03:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-07-17 18:03:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-17 18:03:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-07-17 18:03:28,741 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-07-17 18:03:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:28,742 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-07-17 18:03:28,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 18:03:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-07-17 18:03:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 18:03:28,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:28,744 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] [2020-07-17 18:03:28,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:03:28,745 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-07-17 18:03:28,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:28,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308171217] [2020-07-17 18:03:28,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:03:28,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308171217] [2020-07-17 18:03:28,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:03:28,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 18:03:28,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243755776] [2020-07-17 18:03:28,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:03:28,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:28,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:03:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:03:28,955 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-07-17 18:03:29,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:29,248 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-07-17 18:03:29,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 18:03:29,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-07-17 18:03:29,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:29,251 INFO L225 Difference]: With dead ends: 81 [2020-07-17 18:03:29,251 INFO L226 Difference]: Without dead ends: 54 [2020-07-17 18:03:29,252 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 [2020-07-17 18:03:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-17 18:03:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-07-17 18:03:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-17 18:03:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-07-17 18:03:29,266 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-07-17 18:03:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:29,266 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-07-17 18:03:29,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:03:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-07-17 18:03:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 18:03:29,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:29,268 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] [2020-07-17 18:03:29,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:03:29,268 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:29,269 INFO L82 PathProgramCache]: Analyzing trace with hash -579567659, now seen corresponding path program 1 times [2020-07-17 18:03:29,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:29,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850663145] [2020-07-17 18:03:29,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:03:29,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850663145] [2020-07-17 18:03:29,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:29,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 18:03:29,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674600210] [2020-07-17 18:03:29,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:03:29,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:29,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:03:29,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:03:29,509 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-07-17 18:03:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:29,814 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-07-17 18:03:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 18:03:29,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-07-17 18:03:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:29,817 INFO L225 Difference]: With dead ends: 87 [2020-07-17 18:03:29,817 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 18:03:29,818 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 [2020-07-17 18:03:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 18:03:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-07-17 18:03:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-17 18:03:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-07-17 18:03:29,830 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-07-17 18:03:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:29,831 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-07-17 18:03:29,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:03:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-07-17 18:03:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 18:03:29,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:29,833 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] [2020-07-17 18:03:29,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:03:29,834 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash 556324561, now seen corresponding path program 2 times [2020-07-17 18:03:29,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:29,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699290598] [2020-07-17 18:03:29,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-17 18:03:29,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699290598] [2020-07-17 18:03:29,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:03:29,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:03:29,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560209926] [2020-07-17 18:03:29,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:03:29,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:03:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:03:29,925 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-07-17 18:03:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:30,077 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-07-17 18:03:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 18:03:30,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-07-17 18:03:30,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:30,080 INFO L225 Difference]: With dead ends: 86 [2020-07-17 18:03:30,080 INFO L226 Difference]: Without dead ends: 71 [2020-07-17 18:03:30,081 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 [2020-07-17 18:03:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-17 18:03:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-07-17 18:03:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 18:03:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-07-17 18:03:30,095 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-07-17 18:03:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:30,095 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-07-17 18:03:30,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:03:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-07-17 18:03:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 18:03:30,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:30,097 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] [2020-07-17 18:03:30,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 18:03:30,097 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:30,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:30,098 INFO L82 PathProgramCache]: Analyzing trace with hash 272366111, now seen corresponding path program 1 times [2020-07-17 18:03:30,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:30,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295604522] [2020-07-17 18:03:30,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-17 18:03:30,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295604522] [2020-07-17 18:03:30,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:30,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 18:03:30,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035132694] [2020-07-17 18:03:30,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:03:30,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:30,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:03:30,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:03:30,196 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-07-17 18:03:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:30,372 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-07-17 18:03:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 18:03:30,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-07-17 18:03:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:30,374 INFO L225 Difference]: With dead ends: 95 [2020-07-17 18:03:30,374 INFO L226 Difference]: Without dead ends: 80 [2020-07-17 18:03:30,375 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 [2020-07-17 18:03:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-17 18:03:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-07-17 18:03:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-17 18:03:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-07-17 18:03:30,386 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 48 [2020-07-17 18:03:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:30,387 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-07-17 18:03:30,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:03:30,387 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-07-17 18:03:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 18:03:30,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:30,388 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] [2020-07-17 18:03:30,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 18:03:30,389 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:30,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:30,389 INFO L82 PathProgramCache]: Analyzing trace with hash 92742417, now seen corresponding path program 2 times [2020-07-17 18:03:30,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:30,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465662252] [2020-07-17 18:03:30,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:30,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465662252] [2020-07-17 18:03:30,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:30,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 18:03:30,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862131617] [2020-07-17 18:03:30,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 18:03:30,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:30,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 18:03:30,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:03:30,659 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 11 states. [2020-07-17 18:03:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:31,009 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-07-17 18:03:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 18:03:31,010 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-07-17 18:03:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:31,011 INFO L225 Difference]: With dead ends: 113 [2020-07-17 18:03:31,011 INFO L226 Difference]: Without dead ends: 76 [2020-07-17 18:03:31,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-07-17 18:03:31,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-17 18:03:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-07-17 18:03:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-17 18:03:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-07-17 18:03:31,023 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-07-17 18:03:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:31,023 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-07-17 18:03:31,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 18:03:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-07-17 18:03:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-17 18:03:31,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:31,025 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] [2020-07-17 18:03:31,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 18:03:31,025 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash 809903117, now seen corresponding path program 3 times [2020-07-17 18:03:31,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:31,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387223356] [2020-07-17 18:03:31,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:31,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387223356] [2020-07-17 18:03:31,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:31,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 18:03:31,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062842877] [2020-07-17 18:03:31,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 18:03:31,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:31,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 18:03:31,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:03:31,357 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 13 states. [2020-07-17 18:03:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:31,779 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2020-07-17 18:03:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 18:03:31,779 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-07-17 18:03:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:31,780 INFO L225 Difference]: With dead ends: 119 [2020-07-17 18:03:31,780 INFO L226 Difference]: Without dead ends: 82 [2020-07-17 18:03:31,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-07-17 18:03:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-17 18:03:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-07-17 18:03:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-17 18:03:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-07-17 18:03:31,802 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-07-17 18:03:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:31,802 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-07-17 18:03:31,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 18:03:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-07-17 18:03:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 18:03:31,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:31,804 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] [2020-07-17 18:03:31,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 18:03:31,805 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:31,805 INFO L82 PathProgramCache]: Analyzing trace with hash 577206281, now seen corresponding path program 4 times [2020-07-17 18:03:31,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:31,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282949737] [2020-07-17 18:03:31,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:32,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282949737] [2020-07-17 18:03:32,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:32,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 18:03:32,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379915338] [2020-07-17 18:03:32,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 18:03:32,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:32,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 18:03:32,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:03:32,229 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-07-17 18:03:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:32,748 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2020-07-17 18:03:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 18:03:32,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-17 18:03:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:32,750 INFO L225 Difference]: With dead ends: 125 [2020-07-17 18:03:32,750 INFO L226 Difference]: Without dead ends: 88 [2020-07-17 18:03:32,752 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 [2020-07-17 18:03:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-17 18:03:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-07-17 18:03:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-17 18:03:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-07-17 18:03:32,774 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-07-17 18:03:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:32,774 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-07-17 18:03:32,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 18:03:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-07-17 18:03:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-17 18:03:32,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:32,776 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] [2020-07-17 18:03:32,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 18:03:32,776 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:32,776 INFO L82 PathProgramCache]: Analyzing trace with hash -274669819, now seen corresponding path program 5 times [2020-07-17 18:03:32,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:32,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867132490] [2020-07-17 18:03:32,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:33,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867132490] [2020-07-17 18:03:33,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:33,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 18:03:33,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674090286] [2020-07-17 18:03:33,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 18:03:33,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 18:03:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-07-17 18:03:33,337 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 17 states. [2020-07-17 18:03:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:33,975 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-07-17 18:03:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 18:03:33,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-17 18:03:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:33,979 INFO L225 Difference]: With dead ends: 131 [2020-07-17 18:03:33,980 INFO L226 Difference]: Without dead ends: 94 [2020-07-17 18:03:33,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-07-17 18:03:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-17 18:03:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-07-17 18:03:33,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-17 18:03:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-07-17 18:03:33,992 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-07-17 18:03:33,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:33,993 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-07-17 18:03:33,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 18:03:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-07-17 18:03:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 18:03:33,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:33,995 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] [2020-07-17 18:03:33,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 18:03:33,995 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash -61335295, now seen corresponding path program 6 times [2020-07-17 18:03:33,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:33,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762455875] [2020-07-17 18:03:33,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:34,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762455875] [2020-07-17 18:03:34,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:34,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-17 18:03:34,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436090997] [2020-07-17 18:03:34,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 18:03:34,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:34,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 18:03:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-07-17 18:03:34,617 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 19 states. [2020-07-17 18:03:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:35,473 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-07-17 18:03:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-17 18:03:35,474 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-07-17 18:03:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:35,475 INFO L225 Difference]: With dead ends: 137 [2020-07-17 18:03:35,475 INFO L226 Difference]: Without dead ends: 100 [2020-07-17 18:03:35,476 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 [2020-07-17 18:03:35,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-17 18:03:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-07-17 18:03:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-17 18:03:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-07-17 18:03:35,487 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-07-17 18:03:35,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:35,488 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-07-17 18:03:35,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 18:03:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-07-17 18:03:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-17 18:03:35,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:35,490 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] [2020-07-17 18:03:35,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 18:03:35,490 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:35,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1180506627, now seen corresponding path program 7 times [2020-07-17 18:03:35,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:35,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011754569] [2020-07-17 18:03:35,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:36,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011754569] [2020-07-17 18:03:36,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:36,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-17 18:03:36,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389329230] [2020-07-17 18:03:36,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 18:03:36,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:36,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 18:03:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-07-17 18:03:36,265 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 21 states. [2020-07-17 18:03:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:37,145 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-07-17 18:03:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 18:03:37,146 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-07-17 18:03:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:37,147 INFO L225 Difference]: With dead ends: 143 [2020-07-17 18:03:37,150 INFO L226 Difference]: Without dead ends: 106 [2020-07-17 18:03:37,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 18:03:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-17 18:03:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-07-17 18:03:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-17 18:03:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-07-17 18:03:37,171 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-07-17 18:03:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:37,172 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-07-17 18:03:37,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 18:03:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-07-17 18:03:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-17 18:03:37,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:37,177 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] [2020-07-17 18:03:37,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 18:03:37,177 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:37,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1632044537, now seen corresponding path program 8 times [2020-07-17 18:03:37,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:37,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718432840] [2020-07-17 18:03:37,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:38,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718432840] [2020-07-17 18:03:38,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:38,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-17 18:03:38,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809938512] [2020-07-17 18:03:38,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 18:03:38,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:38,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 18:03:38,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-07-17 18:03:38,041 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 23 states. [2020-07-17 18:03:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:39,073 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-07-17 18:03:39,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-17 18:03:39,074 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-07-17 18:03:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:39,075 INFO L225 Difference]: With dead ends: 149 [2020-07-17 18:03:39,075 INFO L226 Difference]: Without dead ends: 112 [2020-07-17 18:03:39,076 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 [2020-07-17 18:03:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-17 18:03:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-07-17 18:03:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-17 18:03:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-07-17 18:03:39,092 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-07-17 18:03:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:39,092 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-07-17 18:03:39,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 18:03:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-07-17 18:03:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-17 18:03:39,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:39,095 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] [2020-07-17 18:03:39,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 18:03:39,095 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1313195787, now seen corresponding path program 9 times [2020-07-17 18:03:39,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:39,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502044423] [2020-07-17 18:03:39,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:40,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502044423] [2020-07-17 18:03:40,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:40,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-17 18:03:40,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056260737] [2020-07-17 18:03:40,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-17 18:03:40,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-17 18:03:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-07-17 18:03:40,116 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 25 states. [2020-07-17 18:03:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:41,381 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2020-07-17 18:03:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-17 18:03:41,381 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-07-17 18:03:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:41,383 INFO L225 Difference]: With dead ends: 155 [2020-07-17 18:03:41,383 INFO L226 Difference]: Without dead ends: 118 [2020-07-17 18:03:41,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-07-17 18:03:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-17 18:03:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-07-17 18:03:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-17 18:03:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-07-17 18:03:41,401 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-07-17 18:03:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:41,402 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-07-17 18:03:41,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-17 18:03:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-07-17 18:03:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-17 18:03:41,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:41,405 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] [2020-07-17 18:03:41,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 18:03:41,405 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:41,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1440596239, now seen corresponding path program 10 times [2020-07-17 18:03:41,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:41,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279169901] [2020-07-17 18:03:41,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:42,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279169901] [2020-07-17 18:03:42,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:42,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-17 18:03:42,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431103209] [2020-07-17 18:03:42,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-17 18:03:42,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:42,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-17 18:03:42,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-07-17 18:03:42,574 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 27 states. [2020-07-17 18:03:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:43,815 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-07-17 18:03:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-17 18:03:43,816 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-07-17 18:03:43,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:43,818 INFO L225 Difference]: With dead ends: 161 [2020-07-17 18:03:43,818 INFO L226 Difference]: Without dead ends: 124 [2020-07-17 18:03:43,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-07-17 18:03:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-17 18:03:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-07-17 18:03:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-17 18:03:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-07-17 18:03:43,831 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-07-17 18:03:43,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:43,831 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-07-17 18:03:43,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-17 18:03:43,831 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-07-17 18:03:43,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-17 18:03:43,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:43,833 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] [2020-07-17 18:03:43,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 18:03:43,833 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:43,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:43,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1179965421, now seen corresponding path program 11 times [2020-07-17 18:03:43,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:43,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512705965] [2020-07-17 18:03:43,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:45,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512705965] [2020-07-17 18:03:45,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:45,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-17 18:03:45,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094813745] [2020-07-17 18:03:45,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-17 18:03:45,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:45,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-17 18:03:45,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-07-17 18:03:45,079 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 29 states. [2020-07-17 18:03:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:46,526 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2020-07-17 18:03:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-17 18:03:46,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-07-17 18:03:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:46,528 INFO L225 Difference]: With dead ends: 167 [2020-07-17 18:03:46,528 INFO L226 Difference]: Without dead ends: 130 [2020-07-17 18:03:46,529 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 [2020-07-17 18:03:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-17 18:03:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-07-17 18:03:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-17 18:03:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-07-17 18:03:46,541 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-07-17 18:03:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:46,542 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-07-17 18:03:46,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-17 18:03:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-07-17 18:03:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-17 18:03:46,543 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:46,543 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] [2020-07-17 18:03:46,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 18:03:46,544 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:46,544 INFO L82 PathProgramCache]: Analyzing trace with hash 987218921, now seen corresponding path program 12 times [2020-07-17 18:03:46,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:46,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401091915] [2020-07-17 18:03:46,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:47,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401091915] [2020-07-17 18:03:47,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:47,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-07-17 18:03:47,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462786048] [2020-07-17 18:03:47,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-17 18:03:47,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:47,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-17 18:03:47,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-07-17 18:03:47,999 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 31 states. [2020-07-17 18:03:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:49,533 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2020-07-17 18:03:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-17 18:03:49,534 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 115 [2020-07-17 18:03:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:49,535 INFO L225 Difference]: With dead ends: 173 [2020-07-17 18:03:49,536 INFO L226 Difference]: Without dead ends: 136 [2020-07-17 18:03:49,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-07-17 18:03:49,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-17 18:03:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-07-17 18:03:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-17 18:03:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-07-17 18:03:49,550 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-07-17 18:03:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:49,551 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-07-17 18:03:49,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-17 18:03:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-07-17 18:03:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-17 18:03:49,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:49,552 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] [2020-07-17 18:03:49,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 18:03:49,552 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:49,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:49,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1327447323, now seen corresponding path program 13 times [2020-07-17 18:03:49,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:49,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827983261] [2020-07-17 18:03:49,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:51,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827983261] [2020-07-17 18:03:51,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:51,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-07-17 18:03:51,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638198953] [2020-07-17 18:03:51,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-17 18:03:51,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:51,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-17 18:03:51,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-07-17 18:03:51,004 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 33 states. [2020-07-17 18:03:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:52,781 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2020-07-17 18:03:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-17 18:03:52,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 121 [2020-07-17 18:03:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:52,787 INFO L225 Difference]: With dead ends: 179 [2020-07-17 18:03:52,787 INFO L226 Difference]: Without dead ends: 142 [2020-07-17 18:03:52,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-07-17 18:03:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-17 18:03:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-07-17 18:03:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-17 18:03:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-07-17 18:03:52,803 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-07-17 18:03:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:52,804 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-07-17 18:03:52,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-17 18:03:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-07-17 18:03:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-17 18:03:52,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:52,805 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] [2020-07-17 18:03:52,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 18:03:52,806 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:52,806 INFO L82 PathProgramCache]: Analyzing trace with hash 39163105, now seen corresponding path program 14 times [2020-07-17 18:03:52,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:52,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705856460] [2020-07-17 18:03:52,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:54,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705856460] [2020-07-17 18:03:54,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:54,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-07-17 18:03:54,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83622286] [2020-07-17 18:03:54,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-17 18:03:54,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:54,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-17 18:03:54,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 18:03:54,578 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 35 states. [2020-07-17 18:03:56,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:56,489 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-07-17 18:03:56,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-17 18:03:56,490 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2020-07-17 18:03:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:56,491 INFO L225 Difference]: With dead ends: 185 [2020-07-17 18:03:56,492 INFO L226 Difference]: Without dead ends: 148 [2020-07-17 18:03:56,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-07-17 18:03:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-07-17 18:03:56,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-07-17 18:03:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-17 18:03:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-07-17 18:03:56,507 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-07-17 18:03:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:56,508 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-07-17 18:03:56,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-17 18:03:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-07-17 18:03:56,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-17 18:03:56,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:56,509 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] [2020-07-17 18:03:56,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 18:03:56,510 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:56,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:56,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1976302045, now seen corresponding path program 15 times [2020-07-17 18:03:56,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:56,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321115151] [2020-07-17 18:03:56,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:03:58,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321115151] [2020-07-17 18:03:58,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:58,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-07-17 18:03:58,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562885015] [2020-07-17 18:03:58,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-17 18:03:58,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:58,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-17 18:03:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-07-17 18:03:58,506 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 37 states. [2020-07-17 18:04:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:00,516 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-07-17 18:04:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-17 18:04:00,516 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 133 [2020-07-17 18:04:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:00,518 INFO L225 Difference]: With dead ends: 191 [2020-07-17 18:04:00,518 INFO L226 Difference]: Without dead ends: 154 [2020-07-17 18:04:00,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-07-17 18:04:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-17 18:04:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-07-17 18:04:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-17 18:04:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-07-17 18:04:00,538 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-07-17 18:04:00,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:00,538 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-07-17 18:04:00,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-17 18:04:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-07-17 18:04:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-17 18:04:00,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:00,540 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] [2020-07-17 18:04:00,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 18:04:00,540 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:00,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:00,541 INFO L82 PathProgramCache]: Analyzing trace with hash -91639335, now seen corresponding path program 16 times [2020-07-17 18:04:00,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:00,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143006482] [2020-07-17 18:04:00,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:04:02,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143006482] [2020-07-17 18:04:02,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:02,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-07-17 18:04:02,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383181140] [2020-07-17 18:04:02,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-17 18:04:02,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-17 18:04:02,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 18:04:02,571 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 39 states. [2020-07-17 18:04:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:04,768 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-07-17 18:04:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-17 18:04:04,769 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 139 [2020-07-17 18:04:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:04,772 INFO L225 Difference]: With dead ends: 197 [2020-07-17 18:04:04,772 INFO L226 Difference]: Without dead ends: 160 [2020-07-17 18:04:04,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 18:04:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-17 18:04:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-07-17 18:04:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-17 18:04:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-07-17 18:04:04,792 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-07-17 18:04:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:04,793 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-07-17 18:04:04,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-17 18:04:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-07-17 18:04:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-17 18:04:04,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:04,795 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] [2020-07-17 18:04:04,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 18:04:04,795 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:04,796 INFO L82 PathProgramCache]: Analyzing trace with hash -461079339, now seen corresponding path program 17 times [2020-07-17 18:04:04,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:04,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205754625] [2020-07-17 18:04:04,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:04:06,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205754625] [2020-07-17 18:04:06,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:06,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-07-17 18:04:06,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586845947] [2020-07-17 18:04:06,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-17 18:04:06,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:06,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-17 18:04:06,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-07-17 18:04:06,970 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 41 states. [2020-07-17 18:04:09,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:09,482 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-07-17 18:04:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-17 18:04:09,483 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 145 [2020-07-17 18:04:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:09,484 INFO L225 Difference]: With dead ends: 203 [2020-07-17 18:04:09,484 INFO L226 Difference]: Without dead ends: 166 [2020-07-17 18:04:09,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-07-17 18:04:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-17 18:04:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-07-17 18:04:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-17 18:04:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-07-17 18:04:09,504 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-07-17 18:04:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:09,504 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-07-17 18:04:09,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-17 18:04:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-07-17 18:04:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-17 18:04:09,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:09,506 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] [2020-07-17 18:04:09,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 18:04:09,506 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:09,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1469965615, now seen corresponding path program 18 times [2020-07-17 18:04:09,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:09,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171102857] [2020-07-17 18:04:09,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:04:11,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171102857] [2020-07-17 18:04:11,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:11,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-07-17 18:04:11,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739332417] [2020-07-17 18:04:11,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-17 18:04:11,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-17 18:04:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-07-17 18:04:11,900 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 43 states. [2020-07-17 18:04:14,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:14,763 INFO L93 Difference]: Finished difference Result 209 states and 219 transitions. [2020-07-17 18:04:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-17 18:04:14,766 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 151 [2020-07-17 18:04:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:14,767 INFO L225 Difference]: With dead ends: 209 [2020-07-17 18:04:14,767 INFO L226 Difference]: Without dead ends: 172 [2020-07-17 18:04:14,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-07-17 18:04:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-17 18:04:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-07-17 18:04:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-17 18:04:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-07-17 18:04:14,785 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-07-17 18:04:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:14,785 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-07-17 18:04:14,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-17 18:04:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-07-17 18:04:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-17 18:04:14,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:14,786 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] [2020-07-17 18:04:14,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 18:04:14,786 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:14,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1753723955, now seen corresponding path program 19 times [2020-07-17 18:04:14,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:14,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111744601] [2020-07-17 18:04:14,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:04:17,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111744601] [2020-07-17 18:04:17,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:17,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-07-17 18:04:17,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910126087] [2020-07-17 18:04:17,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-17 18:04:17,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:17,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-17 18:04:17,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-07-17 18:04:17,438 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 45 states. [2020-07-17 18:04:20,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:20,304 INFO L93 Difference]: Finished difference Result 215 states and 225 transitions. [2020-07-17 18:04:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-17 18:04:20,304 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 157 [2020-07-17 18:04:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:20,305 INFO L225 Difference]: With dead ends: 215 [2020-07-17 18:04:20,305 INFO L226 Difference]: Without dead ends: 178 [2020-07-17 18:04:20,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-07-17 18:04:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-17 18:04:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-07-17 18:04:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-17 18:04:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-07-17 18:04:20,322 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-07-17 18:04:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:20,322 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-07-17 18:04:20,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-17 18:04:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-07-17 18:04:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-17 18:04:20,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:20,323 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] [2020-07-17 18:04:20,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 18:04:20,324 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1681076279, now seen corresponding path program 20 times [2020-07-17 18:04:20,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:20,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451870086] [2020-07-17 18:04:20,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:04:23,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451870086] [2020-07-17 18:04:23,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:23,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-07-17 18:04:23,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604095663] [2020-07-17 18:04:23,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-17 18:04:23,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-17 18:04:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-07-17 18:04:23,200 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 47 states. [2020-07-17 18:04:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:26,531 INFO L93 Difference]: Finished difference Result 221 states and 231 transitions. [2020-07-17 18:04:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-07-17 18:04:26,533 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2020-07-17 18:04:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:26,534 INFO L225 Difference]: With dead ends: 221 [2020-07-17 18:04:26,534 INFO L226 Difference]: Without dead ends: 184 [2020-07-17 18:04:26,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 18:04:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-17 18:04:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-07-17 18:04:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-17 18:04:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-07-17 18:04:26,555 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-07-17 18:04:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:26,556 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-07-17 18:04:26,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-17 18:04:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-07-17 18:04:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-17 18:04:26,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:26,557 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] [2020-07-17 18:04:26,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 18:04:26,558 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:26,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:26,558 INFO L82 PathProgramCache]: Analyzing trace with hash -199924027, now seen corresponding path program 21 times [2020-07-17 18:04:26,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:26,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113487946] [2020-07-17 18:04:26,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 1281 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:04:29,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113487946] [2020-07-17 18:04:29,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:29,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-07-17 18:04:29,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271801907] [2020-07-17 18:04:29,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-17 18:04:29,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-17 18:04:29,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-07-17 18:04:29,690 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 49 states. [2020-07-17 18:04:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:33,130 INFO L93 Difference]: Finished difference Result 227 states and 237 transitions. [2020-07-17 18:04:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-17 18:04:33,130 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-07-17 18:04:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:33,132 INFO L225 Difference]: With dead ends: 227 [2020-07-17 18:04:33,132 INFO L226 Difference]: Without dead ends: 190 [2020-07-17 18:04:33,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-07-17 18:04:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-17 18:04:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-07-17 18:04:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-17 18:04:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-07-17 18:04:33,149 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-07-17 18:04:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:33,150 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-07-17 18:04:33,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-17 18:04:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-07-17 18:04:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-07-17 18:04:33,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:33,151 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] [2020-07-17 18:04:33,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 18:04:33,151 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash -273166143, now seen corresponding path program 22 times [2020-07-17 18:04:33,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:33,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144411274] [2020-07-17 18:04:33,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:04:36,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144411274] [2020-07-17 18:04:36,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:36,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-07-17 18:04:36,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954808336] [2020-07-17 18:04:36,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-17 18:04:36,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:36,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-17 18:04:36,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-07-17 18:04:36,544 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 51 states. [2020-07-17 18:04:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:40,274 INFO L93 Difference]: Finished difference Result 233 states and 243 transitions. [2020-07-17 18:04:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-07-17 18:04:40,274 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 175 [2020-07-17 18:04:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:40,276 INFO L225 Difference]: With dead ends: 233 [2020-07-17 18:04:40,276 INFO L226 Difference]: Without dead ends: 196 [2020-07-17 18:04:40,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-07-17 18:04:40,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-17 18:04:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-07-17 18:04:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-17 18:04:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-07-17 18:04:40,298 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-07-17 18:04:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:40,299 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-07-17 18:04:40,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-17 18:04:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-07-17 18:04:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-17 18:04:40,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:40,300 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] [2020-07-17 18:04:40,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 18:04:40,301 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1429615171, now seen corresponding path program 23 times [2020-07-17 18:04:40,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:40,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312890339] [2020-07-17 18:04:40,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:04:43,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312890339] [2020-07-17 18:04:43,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:43,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-07-17 18:04:43,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280401114] [2020-07-17 18:04:43,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-17 18:04:43,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:43,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-17 18:04:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-07-17 18:04:43,955 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 53 states. [2020-07-17 18:04:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:47,932 INFO L93 Difference]: Finished difference Result 239 states and 249 transitions. [2020-07-17 18:04:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-07-17 18:04:47,933 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2020-07-17 18:04:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:47,935 INFO L225 Difference]: With dead ends: 239 [2020-07-17 18:04:47,935 INFO L226 Difference]: Without dead ends: 202 [2020-07-17 18:04:47,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-07-17 18:04:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-17 18:04:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-07-17 18:04:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-17 18:04:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-07-17 18:04:47,957 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-07-17 18:04:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:47,957 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-07-17 18:04:47,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-17 18:04:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-07-17 18:04:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-07-17 18:04:47,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:47,959 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] [2020-07-17 18:04:47,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-17 18:04:47,959 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash -904847943, now seen corresponding path program 24 times [2020-07-17 18:04:47,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:47,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788444336] [2020-07-17 18:04:47,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 0 proven. 1680 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:04:52,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788444336] [2020-07-17 18:04:52,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:52,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-07-17 18:04:52,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067749343] [2020-07-17 18:04:52,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-17 18:04:52,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:52,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-17 18:04:52,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 18:04:52,024 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 55 states. [2020-07-17 18:04:56,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:56,233 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2020-07-17 18:04:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-07-17 18:04:56,235 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 187 [2020-07-17 18:04:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:56,236 INFO L225 Difference]: With dead ends: 245 [2020-07-17 18:04:56,236 INFO L226 Difference]: Without dead ends: 208 [2020-07-17 18:04:56,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-07-17 18:04:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-17 18:04:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-07-17 18:04:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-17 18:04:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-07-17 18:04:56,265 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-07-17 18:04:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:56,265 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-07-17 18:04:56,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-17 18:04:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-07-17 18:04:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-07-17 18:04:56,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:56,266 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] [2020-07-17 18:04:56,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-17 18:04:56,267 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:56,267 INFO L82 PathProgramCache]: Analyzing trace with hash 922976437, now seen corresponding path program 25 times [2020-07-17 18:04:56,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:56,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274690917] [2020-07-17 18:04:56,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 0 proven. 1825 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:05:00,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274690917] [2020-07-17 18:05:00,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:05:00,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-07-17 18:05:00,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479138675] [2020-07-17 18:05:00,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-17 18:05:00,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-17 18:05:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-07-17 18:05:00,493 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 57 states. [2020-07-17 18:05:05,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:05,237 INFO L93 Difference]: Finished difference Result 251 states and 261 transitions. [2020-07-17 18:05:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-07-17 18:05:05,238 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 193 [2020-07-17 18:05:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:05,240 INFO L225 Difference]: With dead ends: 251 [2020-07-17 18:05:05,240 INFO L226 Difference]: Without dead ends: 214 [2020-07-17 18:05:05,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-07-17 18:05:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-17 18:05:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-07-17 18:05:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-07-17 18:05:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-07-17 18:05:05,273 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-07-17 18:05:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:05,274 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-07-17 18:05:05,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-17 18:05:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-07-17 18:05:05,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-17 18:05:05,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:05,276 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] [2020-07-17 18:05:05,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-17 18:05:05,276 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:05,276 INFO L82 PathProgramCache]: Analyzing trace with hash -607734095, now seen corresponding path program 26 times [2020-07-17 18:05:05,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:05,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322341607] [2020-07-17 18:05:05,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1976 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:05:09,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322341607] [2020-07-17 18:05:09,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:05:09,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-07-17 18:05:09,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541454186] [2020-07-17 18:05:09,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-17 18:05:09,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:09,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-17 18:05:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-07-17 18:05:09,970 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 59 states. [2020-07-17 18:05:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:15,053 INFO L93 Difference]: Finished difference Result 257 states and 267 transitions. [2020-07-17 18:05:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-07-17 18:05:15,054 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 199 [2020-07-17 18:05:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:15,056 INFO L225 Difference]: With dead ends: 257 [2020-07-17 18:05:15,056 INFO L226 Difference]: Without dead ends: 220 [2020-07-17 18:05:15,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-07-17 18:05:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-17 18:05:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-07-17 18:05:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-17 18:05:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-07-17 18:05:15,090 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-07-17 18:05:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:15,090 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-07-17 18:05:15,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-17 18:05:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-07-17 18:05:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-07-17 18:05:15,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:15,092 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] [2020-07-17 18:05:15,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-17 18:05:15,093 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:15,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1597013933, now seen corresponding path program 27 times [2020-07-17 18:05:15,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:15,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458470438] [2020-07-17 18:05:15,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 0 proven. 2133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:05:19,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458470438] [2020-07-17 18:05:19,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:05:19,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-07-17 18:05:19,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033696693] [2020-07-17 18:05:19,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-17 18:05:19,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:19,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-17 18:05:19,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-07-17 18:05:19,971 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 61 states. [2020-07-17 18:05:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:25,342 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2020-07-17 18:05:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-07-17 18:05:25,343 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 205 [2020-07-17 18:05:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:25,346 INFO L225 Difference]: With dead ends: 263 [2020-07-17 18:05:25,346 INFO L226 Difference]: Without dead ends: 226 [2020-07-17 18:05:25,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-07-17 18:05:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-17 18:05:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-07-17 18:05:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-17 18:05:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-07-17 18:05:25,375 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-07-17 18:05:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:25,376 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-07-17 18:05:25,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-17 18:05:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-07-17 18:05:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-07-17 18:05:25,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:25,377 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] [2020-07-17 18:05:25,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-17 18:05:25,378 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:25,378 INFO L82 PathProgramCache]: Analyzing trace with hash -523854935, now seen corresponding path program 28 times [2020-07-17 18:05:25,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:25,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352643974] [2020-07-17 18:05:25,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 2296 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:05:30,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352643974] [2020-07-17 18:05:30,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:05:30,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-07-17 18:05:30,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550966034] [2020-07-17 18:05:30,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-17 18:05:30,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:30,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-17 18:05:30,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-07-17 18:05:30,708 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 63 states. [2020-07-17 18:05:36,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:36,500 INFO L93 Difference]: Finished difference Result 269 states and 279 transitions. [2020-07-17 18:05:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-07-17 18:05:36,501 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 211 [2020-07-17 18:05:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:36,504 INFO L225 Difference]: With dead ends: 269 [2020-07-17 18:05:36,504 INFO L226 Difference]: Without dead ends: 232 [2020-07-17 18:05:36,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-07-17 18:05:36,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-17 18:05:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-07-17 18:05:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-17 18:05:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-07-17 18:05:36,532 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-07-17 18:05:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:36,533 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-07-17 18:05:36,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-17 18:05:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-07-17 18:05:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-07-17 18:05:36,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:36,534 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] [2020-07-17 18:05:36,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-17 18:05:36,535 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1262564699, now seen corresponding path program 29 times [2020-07-17 18:05:36,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:36,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401661306] [2020-07-17 18:05:36,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 0 proven. 2465 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:05:42,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401661306] [2020-07-17 18:05:42,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:05:42,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-07-17 18:05:42,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270805380] [2020-07-17 18:05:42,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-17 18:05:42,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-17 18:05:42,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-07-17 18:05:42,370 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 65 states. [2020-07-17 18:05:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:48,648 INFO L93 Difference]: Finished difference Result 275 states and 285 transitions. [2020-07-17 18:05:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-17 18:05:48,649 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 217 [2020-07-17 18:05:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:48,651 INFO L225 Difference]: With dead ends: 275 [2020-07-17 18:05:48,651 INFO L226 Difference]: Without dead ends: 238 [2020-07-17 18:05:48,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-07-17 18:05:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-17 18:05:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-07-17 18:05:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-17 18:05:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-07-17 18:05:48,686 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-07-17 18:05:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:48,686 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-07-17 18:05:48,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-17 18:05:48,686 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-07-17 18:05:48,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-07-17 18:05:48,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:48,688 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] [2020-07-17 18:05:48,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-17 18:05:48,688 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:48,689 INFO L82 PathProgramCache]: Analyzing trace with hash 536792225, now seen corresponding path program 30 times [2020-07-17 18:05:48,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:48,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714739671] [2020-07-17 18:05:48,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2649 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:05:54,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714739671] [2020-07-17 18:05:54,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:05:54,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-07-17 18:05:54,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231367358] [2020-07-17 18:05:54,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-17 18:05:54,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:54,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-17 18:05:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-07-17 18:05:54,895 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 67 states. [2020-07-17 18:06:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:01,634 INFO L93 Difference]: Finished difference Result 281 states and 291 transitions. [2020-07-17 18:06:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-07-17 18:06:01,635 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 223 [2020-07-17 18:06:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:01,636 INFO L225 Difference]: With dead ends: 281 [2020-07-17 18:06:01,637 INFO L226 Difference]: Without dead ends: 244 [2020-07-17 18:06:01,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-07-17 18:06:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-07-17 18:06:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-07-17 18:06:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-17 18:06:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-07-17 18:06:01,678 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-07-17 18:06:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:01,678 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-07-17 18:06:01,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-17 18:06:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-07-17 18:06:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-07-17 18:06:01,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:01,680 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] [2020-07-17 18:06:01,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-17 18:06:01,680 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:01,681 INFO L82 PathProgramCache]: Analyzing trace with hash 337404317, now seen corresponding path program 31 times [2020-07-17 18:06:01,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:01,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136449324] [2020-07-17 18:06:01,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:06:08,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136449324] [2020-07-17 18:06:08,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:06:08,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-07-17 18:06:08,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207532295] [2020-07-17 18:06:08,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-17 18:06:08,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:08,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-17 18:06:08,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-07-17 18:06:08,455 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 69 states. [2020-07-17 18:06:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:15,742 INFO L93 Difference]: Finished difference Result 287 states and 297 transitions. [2020-07-17 18:06:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-07-17 18:06:15,743 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 229 [2020-07-17 18:06:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:15,745 INFO L225 Difference]: With dead ends: 287 [2020-07-17 18:06:15,745 INFO L226 Difference]: Without dead ends: 250 [2020-07-17 18:06:15,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-07-17 18:06:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-17 18:06:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-07-17 18:06:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-07-17 18:06:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-07-17 18:06:15,787 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-07-17 18:06:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:15,787 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-07-17 18:06:15,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-17 18:06:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-07-17 18:06:15,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-07-17 18:06:15,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:15,789 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] [2020-07-17 18:06:15,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-17 18:06:15,790 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:15,790 INFO L82 PathProgramCache]: Analyzing trace with hash -346207847, now seen corresponding path program 32 times [2020-07-17 18:06:15,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:15,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770087207] [2020-07-17 18:06:15,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 0 proven. 3008 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:06:23,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770087207] [2020-07-17 18:06:23,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:06:23,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-07-17 18:06:23,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408871159] [2020-07-17 18:06:23,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-17 18:06:23,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:23,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-17 18:06:23,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-07-17 18:06:23,077 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 71 states. [2020-07-17 18:06:31,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:31,106 INFO L93 Difference]: Finished difference Result 293 states and 303 transitions. [2020-07-17 18:06:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-07-17 18:06:31,107 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 235 [2020-07-17 18:06:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:31,109 INFO L225 Difference]: With dead ends: 293 [2020-07-17 18:06:31,109 INFO L226 Difference]: Without dead ends: 256 [2020-07-17 18:06:31,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-07-17 18:06:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-07-17 18:06:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-07-17 18:06:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-07-17 18:06:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-07-17 18:06:31,152 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-07-17 18:06:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:31,153 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-07-17 18:06:31,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-17 18:06:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-07-17 18:06:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-17 18:06:31,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:31,154 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] [2020-07-17 18:06:31,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-17 18:06:31,155 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash 615990421, now seen corresponding path program 33 times [2020-07-17 18:06:31,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:31,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059125149] [2020-07-17 18:06:31,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3201 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:06:38,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059125149] [2020-07-17 18:06:38,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:06:38,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-07-17 18:06:38,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088178757] [2020-07-17 18:06:38,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-17 18:06:38,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-17 18:06:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-07-17 18:06:38,890 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 73 states. [2020-07-17 18:06:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:47,236 INFO L93 Difference]: Finished difference Result 299 states and 309 transitions. [2020-07-17 18:06:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-07-17 18:06:47,238 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 241 [2020-07-17 18:06:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:47,240 INFO L225 Difference]: With dead ends: 299 [2020-07-17 18:06:47,240 INFO L226 Difference]: Without dead ends: 262 [2020-07-17 18:06:47,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-07-17 18:06:47,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-17 18:06:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-07-17 18:06:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-07-17 18:06:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-07-17 18:06:47,286 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-07-17 18:06:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:47,287 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-07-17 18:06:47,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-17 18:06:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-07-17 18:06:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-07-17 18:06:47,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:47,289 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] [2020-07-17 18:06:47,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-17 18:06:47,289 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash 533729937, now seen corresponding path program 34 times [2020-07-17 18:06:47,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:47,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359191797] [2020-07-17 18:06:47,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3409 backedges. 0 proven. 3400 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:06:55,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359191797] [2020-07-17 18:06:55,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:06:55,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-07-17 18:06:55,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128854649] [2020-07-17 18:06:55,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-17 18:06:55,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:55,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-17 18:06:55,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 18:06:55,707 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 75 states. [2020-07-17 18:07:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:04,832 INFO L93 Difference]: Finished difference Result 305 states and 315 transitions. [2020-07-17 18:07:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-07-17 18:07:04,833 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 247 [2020-07-17 18:07:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:04,835 INFO L225 Difference]: With dead ends: 305 [2020-07-17 18:07:04,835 INFO L226 Difference]: Without dead ends: 268 [2020-07-17 18:07:04,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-07-17 18:07:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-07-17 18:07:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-07-17 18:07:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-17 18:07:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-07-17 18:07:04,880 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-07-17 18:07:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:04,880 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-07-17 18:07:04,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-17 18:07:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-07-17 18:07:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-07-17 18:07:04,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:04,882 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] [2020-07-17 18:07:04,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-17 18:07:04,882 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash -654478451, now seen corresponding path program 35 times [2020-07-17 18:07:04,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:04,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372019543] [2020-07-17 18:07:04,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3614 backedges. 0 proven. 3605 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:07:13,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372019543] [2020-07-17 18:07:13,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:07:13,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-07-17 18:07:13,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174054523] [2020-07-17 18:07:13,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-07-17 18:07:13,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-07-17 18:07:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-07-17 18:07:13,864 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 77 states. [2020-07-17 18:07:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:23,158 INFO L93 Difference]: Finished difference Result 311 states and 321 transitions. [2020-07-17 18:07:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-07-17 18:07:23,160 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 253 [2020-07-17 18:07:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:23,161 INFO L225 Difference]: With dead ends: 311 [2020-07-17 18:07:23,161 INFO L226 Difference]: Without dead ends: 274 [2020-07-17 18:07:23,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-07-17 18:07:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-17 18:07:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-07-17 18:07:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-17 18:07:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-07-17 18:07:23,228 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-07-17 18:07:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:23,229 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-07-17 18:07:23,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-07-17 18:07:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-07-17 18:07:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-07-17 18:07:23,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:23,231 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] [2020-07-17 18:07:23,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-17 18:07:23,231 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:23,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1522194551, now seen corresponding path program 36 times [2020-07-17 18:07:23,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:23,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175575042] [2020-07-17 18:07:23,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:07:32,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175575042] [2020-07-17 18:07:32,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:07:32,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-07-17 18:07:32,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930095326] [2020-07-17 18:07:32,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-07-17 18:07:32,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:32,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-07-17 18:07:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-07-17 18:07:32,928 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 79 states. [2020-07-17 18:07:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:43,007 INFO L93 Difference]: Finished difference Result 317 states and 327 transitions. [2020-07-17 18:07:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-07-17 18:07:43,008 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 259 [2020-07-17 18:07:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:43,010 INFO L225 Difference]: With dead ends: 317 [2020-07-17 18:07:43,010 INFO L226 Difference]: Without dead ends: 280 [2020-07-17 18:07:43,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-07-17 18:07:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-07-17 18:07:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-07-17 18:07:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-07-17 18:07:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-07-17 18:07:43,056 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-07-17 18:07:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:43,056 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-07-17 18:07:43,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-07-17 18:07:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-07-17 18:07:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-07-17 18:07:43,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:43,059 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] [2020-07-17 18:07:43,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-17 18:07:43,059 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:43,060 INFO L82 PathProgramCache]: Analyzing trace with hash -295899515, now seen corresponding path program 37 times [2020-07-17 18:07:43,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:43,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611909128] [2020-07-17 18:07:43,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4042 backedges. 0 proven. 4033 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:07:53,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611909128] [2020-07-17 18:07:53,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:07:53,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-07-17 18:07:53,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910349696] [2020-07-17 18:07:53,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-07-17 18:07:53,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:53,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-07-17 18:07:53,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-07-17 18:07:53,189 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 81 states. [2020-07-17 18:08:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:04,128 INFO L93 Difference]: Finished difference Result 323 states and 333 transitions. [2020-07-17 18:08:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-17 18:08:04,130 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 265 [2020-07-17 18:08:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:04,132 INFO L225 Difference]: With dead ends: 323 [2020-07-17 18:08:04,132 INFO L226 Difference]: Without dead ends: 286 [2020-07-17 18:08:04,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-07-17 18:08:04,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-17 18:08:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-07-17 18:08:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-07-17 18:08:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-07-17 18:08:04,191 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-07-17 18:08:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:04,191 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-07-17 18:08:04,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-07-17 18:08:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-07-17 18:08:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-07-17 18:08:04,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:04,194 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] [2020-07-17 18:08:04,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-17 18:08:04,194 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:04,195 INFO L82 PathProgramCache]: Analyzing trace with hash -290813823, now seen corresponding path program 38 times [2020-07-17 18:08:04,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:04,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525219348] [2020-07-17 18:08:04,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 0 proven. 4256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:08:15,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525219348] [2020-07-17 18:08:15,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:15,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-07-17 18:08:15,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161487781] [2020-07-17 18:08:15,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-07-17 18:08:15,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:15,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-07-17 18:08:15,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-07-17 18:08:15,399 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 83 states. [2020-07-17 18:08:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:27,707 INFO L93 Difference]: Finished difference Result 329 states and 339 transitions. [2020-07-17 18:08:27,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-07-17 18:08:27,708 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 271 [2020-07-17 18:08:27,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:27,710 INFO L225 Difference]: With dead ends: 329 [2020-07-17 18:08:27,710 INFO L226 Difference]: Without dead ends: 292 [2020-07-17 18:08:27,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-07-17 18:08:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-17 18:08:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-07-17 18:08:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-07-17 18:08:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-07-17 18:08:27,761 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-07-17 18:08:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:27,761 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-07-17 18:08:27,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-07-17 18:08:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-07-17 18:08:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-07-17 18:08:27,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:27,763 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] [2020-07-17 18:08:27,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-17 18:08:27,763 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:27,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1833153917, now seen corresponding path program 39 times [2020-07-17 18:08:27,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:27,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833260414] [2020-07-17 18:08:27,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4494 backedges. 0 proven. 4485 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:08:39,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833260414] [2020-07-17 18:08:39,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:39,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-07-17 18:08:39,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277527409] [2020-07-17 18:08:39,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-07-17 18:08:39,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:39,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-07-17 18:08:39,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-07-17 18:08:39,311 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 85 states. [2020-07-17 18:08:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:51,530 INFO L93 Difference]: Finished difference Result 335 states and 345 transitions. [2020-07-17 18:08:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-07-17 18:08:51,531 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 277 [2020-07-17 18:08:51,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:51,533 INFO L225 Difference]: With dead ends: 335 [2020-07-17 18:08:51,533 INFO L226 Difference]: Without dead ends: 298 [2020-07-17 18:08:51,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-07-17 18:08:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-07-17 18:08:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-07-17 18:08:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-17 18:08:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-07-17 18:08:51,594 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-07-17 18:08:51,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:51,596 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-07-17 18:08:51,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-07-17 18:08:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-07-17 18:08:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-07-17 18:08:51,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:51,598 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] [2020-07-17 18:08:51,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-17 18:08:51,598 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:51,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2045654393, now seen corresponding path program 40 times [2020-07-17 18:08:51,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:51,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404635269] [2020-07-17 18:08:51,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 0 proven. 4720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:09:03,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404635269] [2020-07-17 18:09:03,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:03,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-07-17 18:09:03,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998347008] [2020-07-17 18:09:03,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-07-17 18:09:03,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-07-17 18:09:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-07-17 18:09:03,751 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 87 states. [2020-07-17 18:09:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:17,790 INFO L93 Difference]: Finished difference Result 341 states and 351 transitions. [2020-07-17 18:09:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-07-17 18:09:17,791 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 283 [2020-07-17 18:09:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:17,793 INFO L225 Difference]: With dead ends: 341 [2020-07-17 18:09:17,793 INFO L226 Difference]: Without dead ends: 304 [2020-07-17 18:09:17,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-07-17 18:09:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-07-17 18:09:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-07-17 18:09:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-07-17 18:09:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-07-17 18:09:17,854 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-07-17 18:09:17,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:17,854 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-07-17 18:09:17,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-07-17 18:09:17,854 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-07-17 18:09:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-07-17 18:09:17,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:17,856 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] [2020-07-17 18:09:17,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-07-17 18:09:17,857 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash 689948789, now seen corresponding path program 41 times [2020-07-17 18:09:17,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:17,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939399668] [2020-07-17 18:09:17,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4961 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:09:31,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939399668] [2020-07-17 18:09:31,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:31,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-07-17 18:09:31,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342167822] [2020-07-17 18:09:31,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-07-17 18:09:31,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:31,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-07-17 18:09:31,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-07-17 18:09:31,591 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 89 states. [2020-07-17 18:09:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:48,560 INFO L93 Difference]: Finished difference Result 347 states and 357 transitions. [2020-07-17 18:09:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-07-17 18:09:48,562 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 289 [2020-07-17 18:09:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:48,564 INFO L225 Difference]: With dead ends: 347 [2020-07-17 18:09:48,564 INFO L226 Difference]: Without dead ends: 310 [2020-07-17 18:09:48,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-07-17 18:09:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-07-17 18:09:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-07-17 18:09:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-07-17 18:09:48,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-07-17 18:09:48,613 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-07-17 18:09:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:48,614 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-07-17 18:09:48,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-07-17 18:09:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-07-17 18:09:48,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-07-17 18:09:48,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:48,616 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] [2020-07-17 18:09:48,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-07-17 18:09:48,616 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:48,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1342058097, now seen corresponding path program 42 times [2020-07-17 18:09:48,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:48,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785821161] [2020-07-17 18:09:48,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5217 backedges. 0 proven. 5208 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:10:05,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785821161] [2020-07-17 18:10:05,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:05,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-07-17 18:10:05,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543670972] [2020-07-17 18:10:05,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-07-17 18:10:05,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:05,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-07-17 18:10:05,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 18:10:05,032 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 91 states. [2020-07-17 18:10:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:22,153 INFO L93 Difference]: Finished difference Result 353 states and 363 transitions. [2020-07-17 18:10:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-07-17 18:10:22,155 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 295 [2020-07-17 18:10:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:22,158 INFO L225 Difference]: With dead ends: 353 [2020-07-17 18:10:22,158 INFO L226 Difference]: Without dead ends: 316 [2020-07-17 18:10:22,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-07-17 18:10:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-07-17 18:10:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-07-17 18:10:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-07-17 18:10:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-07-17 18:10:22,225 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-07-17 18:10:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:22,226 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-07-17 18:10:22,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-07-17 18:10:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-07-17 18:10:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-07-17 18:10:22,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:22,228 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] [2020-07-17 18:10:22,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-07-17 18:10:22,229 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1079977837, now seen corresponding path program 43 times [2020-07-17 18:10:22,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:22,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522174430] [2020-07-17 18:10:22,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5470 backedges. 0 proven. 5461 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:10:40,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522174430] [2020-07-17 18:10:40,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:40,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-07-17 18:10:40,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117535025] [2020-07-17 18:10:40,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-07-17 18:10:40,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-07-17 18:10:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-07-17 18:10:40,428 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 93 states. [2020-07-17 18:11:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:00,232 INFO L93 Difference]: Finished difference Result 359 states and 369 transitions. [2020-07-17 18:11:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-07-17 18:11:00,235 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 301 [2020-07-17 18:11:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:00,237 INFO L225 Difference]: With dead ends: 359 [2020-07-17 18:11:00,237 INFO L226 Difference]: Without dead ends: 322 [2020-07-17 18:11:00,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-07-17 18:11:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-07-17 18:11:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-07-17 18:11:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-07-17 18:11:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-07-17 18:11:00,312 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-07-17 18:11:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:00,313 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-07-17 18:11:00,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-07-17 18:11:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-07-17 18:11:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-07-17 18:11:00,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:00,316 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] [2020-07-17 18:11:00,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-07-17 18:11:00,316 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:00,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2067238039, now seen corresponding path program 44 times [2020-07-17 18:11:00,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:00,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129050070] [2020-07-17 18:11:00,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 0 proven. 5720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:11:19,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129050070] [2020-07-17 18:11:19,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:19,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-07-17 18:11:19,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190247374] [2020-07-17 18:11:19,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-07-17 18:11:19,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:19,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-07-17 18:11:19,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-07-17 18:11:19,510 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 95 states. [2020-07-17 18:11:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:40,854 INFO L93 Difference]: Finished difference Result 365 states and 375 transitions. [2020-07-17 18:11:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-07-17 18:11:40,857 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 307 [2020-07-17 18:11:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:40,859 INFO L225 Difference]: With dead ends: 365 [2020-07-17 18:11:40,860 INFO L226 Difference]: Without dead ends: 328 [2020-07-17 18:11:40,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-07-17 18:11:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-07-17 18:11:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-07-17 18:11:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-07-17 18:11:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-07-17 18:11:40,936 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-07-17 18:11:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:40,936 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-07-17 18:11:40,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-07-17 18:11:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-07-17 18:11:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-07-17 18:11:40,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:40,939 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] [2020-07-17 18:11:40,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-07-17 18:11:40,940 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:40,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1670393243, now seen corresponding path program 45 times [2020-07-17 18:11:40,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:40,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220330222] [2020-07-17 18:11:40,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:12:02,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220330222] [2020-07-17 18:12:02,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:02,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-07-17 18:12:02,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434317696] [2020-07-17 18:12:02,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-07-17 18:12:02,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-07-17 18:12:02,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-07-17 18:12:02,470 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 97 states. [2020-07-17 18:12:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:25,268 INFO L93 Difference]: Finished difference Result 371 states and 381 transitions. [2020-07-17 18:12:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-07-17 18:12:25,270 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 313 [2020-07-17 18:12:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:25,273 INFO L225 Difference]: With dead ends: 371 [2020-07-17 18:12:25,273 INFO L226 Difference]: Without dead ends: 334 [2020-07-17 18:12:25,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-07-17 18:12:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-07-17 18:12:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-07-17 18:12:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-07-17 18:12:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-07-17 18:12:25,349 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-07-17 18:12:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:25,350 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-07-17 18:12:25,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-07-17 18:12:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-07-17 18:12:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-07-17 18:12:25,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:25,353 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] [2020-07-17 18:12:25,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-07-17 18:12:25,353 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1220869023, now seen corresponding path program 46 times [2020-07-17 18:12:25,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:25,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220024679] [2020-07-17 18:12:25,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6265 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:12:48,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220024679] [2020-07-17 18:12:48,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:48,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-07-17 18:12:48,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900761004] [2020-07-17 18:12:48,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-17 18:12:48,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-17 18:12:48,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-07-17 18:12:48,665 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 99 states. [2020-07-17 18:13:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:13:12,380 INFO L93 Difference]: Finished difference Result 377 states and 387 transitions. [2020-07-17 18:13:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-07-17 18:13:12,383 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 319 [2020-07-17 18:13:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:13:12,385 INFO L225 Difference]: With dead ends: 377 [2020-07-17 18:13:12,385 INFO L226 Difference]: Without dead ends: 340 [2020-07-17 18:13:12,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-07-17 18:13:12,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-07-17 18:13:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-07-17 18:13:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-07-17 18:13:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-07-17 18:13:12,443 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-07-17 18:13:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:13:12,443 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-07-17 18:13:12,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-17 18:13:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-07-17 18:13:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-17 18:13:12,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:13:12,446 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] [2020-07-17 18:13:12,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-07-17 18:13:12,446 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:13:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:13:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1908394333, now seen corresponding path program 47 times [2020-07-17 18:13:12,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:13:12,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195334869] [2020-07-17 18:13:12,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:13:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6542 backedges. 0 proven. 6533 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:13:39,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195334869] [2020-07-17 18:13:39,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:13:39,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-07-17 18:13:39,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437356104] [2020-07-17 18:13:39,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-17 18:13:39,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:13:39,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-17 18:13:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2020-07-17 18:13:39,656 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 101 states. [2020-07-17 18:14:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:14:10,402 INFO L93 Difference]: Finished difference Result 383 states and 393 transitions. [2020-07-17 18:14:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-07-17 18:14:10,407 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 325 [2020-07-17 18:14:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:14:10,409 INFO L225 Difference]: With dead ends: 383 [2020-07-17 18:14:10,409 INFO L226 Difference]: Without dead ends: 346 [2020-07-17 18:14:10,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7194 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=11973, Invalid=27429, Unknown=0, NotChecked=0, Total=39402 [2020-07-17 18:14:10,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-07-17 18:14:10,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-07-17 18:14:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-07-17 18:14:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-07-17 18:14:10,466 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 325 [2020-07-17 18:14:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:14:10,467 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-07-17 18:14:10,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-17 18:14:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-07-17 18:14:10,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-17 18:14:10,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:14:10,469 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] [2020-07-17 18:14:10,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-07-17 18:14:10,469 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:14:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:14:10,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1857822375, now seen corresponding path program 48 times [2020-07-17 18:14:10,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:14:10,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706718925] [2020-07-17 18:14:10,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:14:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:11,169 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:11,315 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:11,468 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:11,629 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:11,944 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:15,233 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:15,500 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:15,763 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:16,844 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:20,860 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:21,222 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:21,587 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:22,689 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:23,385 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:23,787 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:28,670 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:29,142 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:29,608 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:30,578 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:35,966 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:14:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6825 backedges. 0 proven. 6816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:14:44,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706718925] [2020-07-17 18:14:44,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:14:44,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2020-07-17 18:14:44,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666674569] [2020-07-17 18:14:44,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-17 18:14:44,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:14:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-17 18:14:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2604, Invalid=7902, Unknown=0, NotChecked=0, Total=10506 [2020-07-17 18:14:44,306 INFO L87 Difference]: Start difference. First operand 342 states and 347 transitions. Second operand 103 states. [2020-07-17 18:15:10,707 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-17 18:15:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:15:19,106 INFO L93 Difference]: Finished difference Result 389 states and 399 transitions. [2020-07-17 18:15:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2020-07-17 18:15:19,110 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 331 [2020-07-17 18:15:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:15:19,113 INFO L225 Difference]: With dead ends: 389 [2020-07-17 18:15:19,113 INFO L226 Difference]: Without dead ends: 352 [2020-07-17 18:15:19,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7491 ImplicationChecksByTransitivity, 64.6s TimeCoverageRelationStatistics Valid=12467, Invalid=28539, Unknown=0, NotChecked=0, Total=41006 [2020-07-17 18:15:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-07-17 18:15:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2020-07-17 18:15:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-07-17 18:15:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 353 transitions. [2020-07-17 18:15:19,189 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 353 transitions. Word has length 331 [2020-07-17 18:15:19,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:15:19,189 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 353 transitions. [2020-07-17 18:15:19,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-17 18:15:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 353 transitions. [2020-07-17 18:15:19,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-17 18:15:19,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:15:19,192 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 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] [2020-07-17 18:15:19,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-07-17 18:15:19,192 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:15:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:15:19,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1078129579, now seen corresponding path program 49 times [2020-07-17 18:15:19,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:15:19,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498405033] [2020-07-17 18:15:19,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:15:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:19,787 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:19,947 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:20,244 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:20,423 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:20,601 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:20,777 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:20,955 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:21,140 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:21,322 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:21,522 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:21,712 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:22,292 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:22,507 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:22,715 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:22,960 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:23,178 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:23,430 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:23,669 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:23,920 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:24,150 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:24,413 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:24,673 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:24,949 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:25,211 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:25,493 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:26,263 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:26,510 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:27,079 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:27,405 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:28,033 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:28,967 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:30,253 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:30,897 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:32,578 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:33,709 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:34,514 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:37,552 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:38,027 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:38,519 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:38,999 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:39,470 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:39,959 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:41,812 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:42,374 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:42,921 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:43,462 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:44,005 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:44,552 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:45,102 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:45,664 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:46,228 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:46,808 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:47,934 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:48,594 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:49,263 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:49,951 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:50,641 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:51,276 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:51,893 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:52,509 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:53,150 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:53,757 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:54,373 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:55,011 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:55,667 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:56,307 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:56,962 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:57,662 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:58,357 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:15:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7114 backedges. 0 proven. 7105 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 18:15:58,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498405033] [2020-07-17 18:15:58,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:15:58,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2020-07-17 18:15:58,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738865446] [2020-07-17 18:15:58,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-07-17 18:15:58,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:15:58,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-07-17 18:15:58,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2707, Invalid=8213, Unknown=0, NotChecked=0, Total=10920 [2020-07-17 18:15:58,875 INFO L87 Difference]: Start difference. First operand 348 states and 353 transitions. Second operand 105 states. [2020-07-17 18:16:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:16:35,436 INFO L93 Difference]: Finished difference Result 395 states and 405 transitions. [2020-07-17 18:16:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2020-07-17 18:16:35,441 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 337 [2020-07-17 18:16:35,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:16:35,443 INFO L225 Difference]: With dead ends: 395 [2020-07-17 18:16:35,443 INFO L226 Difference]: Without dead ends: 358 [2020-07-17 18:16:35,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7794 ImplicationChecksByTransitivity, 72.0s TimeCoverageRelationStatistics Valid=12971, Invalid=29671, Unknown=0, NotChecked=0, Total=42642 [2020-07-17 18:16:35,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-07-17 18:16:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2020-07-17 18:16:35,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-07-17 18:16:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 359 transitions. [2020-07-17 18:16:35,501 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 359 transitions. Word has length 337 [2020-07-17 18:16:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:16:35,502 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 359 transitions. [2020-07-17 18:16:35,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-07-17 18:16:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 359 transitions. [2020-07-17 18:16:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-17 18:16:35,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:16:35,504 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 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] [2020-07-17 18:16:35,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-07-17 18:16:35,504 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:16:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:16:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1204882001, now seen corresponding path program 50 times [2020-07-17 18:16:35,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:16:35,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777893063] [2020-07-17 18:16:35,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:16:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:36,020 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:36,173 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:36,330 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:36,495 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:36,668 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:36,845 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:37,030 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:37,219 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:37,410 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:37,608 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:37,820 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:38,055 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:38,274 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:38,498 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:38,727 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:38,959 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:39,204 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:39,443 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:39,677 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:39,935 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:40,184 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:40,454 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:40,730 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:41,003 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:41,279 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:41,557 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:41,846 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:42,139 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:42,436 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:42,767 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:43,373 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:43,712 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:44,059 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:44,435 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:44,773 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:45,439 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:45,797 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:46,161 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:46,564 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:46,948 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:47,305 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:47,643 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:48,029 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:48,441 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 18:16:48,883 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12