/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:46:29,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:29,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:29,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:46:29,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:46:29,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:46:29,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:46:29,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:46:29,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:46:29,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:46:29,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:46:29,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:46:29,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:29,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:29,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:29,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:29,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:29,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:29,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:29,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:29,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:29,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:29,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:29,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:30,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:46:30,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:46:30,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:46:30,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:46:30,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:46:30,019 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:30,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:30,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:30,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:30,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:30,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:30,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:30,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:30,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:30,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:30,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:30,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:30,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:30,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:30,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:30,023 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:30,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:30,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:30,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:30,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:30,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:30,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:30,024 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:30,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:30,338 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:30,341 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:30,343 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:30,343 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:30,344 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-08-22 19:46:30,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23119439c/6a9f5860f97b4e2b9ad0e01d2e0c985b/FLAG875f70444 [2020-08-22 19:46:30,836 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:30,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-08-22 19:46:30,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23119439c/6a9f5860f97b4e2b9ad0e01d2e0c985b/FLAG875f70444 [2020-08-22 19:46:31,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23119439c/6a9f5860f97b4e2b9ad0e01d2e0c985b [2020-08-22 19:46:31,240 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:31,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:31,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:31,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:31,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:31,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:31" (1/1) ... [2020-08-22 19:46:31,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6d277a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31, skipping insertion in model container [2020-08-22 19:46:31,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:31" (1/1) ... [2020-08-22 19:46:31,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:31,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:31,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:31,441 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:31,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:31,470 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:31,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31 WrapperNode [2020-08-22 19:46:31,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:31,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:31,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:31,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:31,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31" (1/1) ... [2020-08-22 19:46:31,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31" (1/1) ... [2020-08-22 19:46:31,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31" (1/1) ... [2020-08-22 19:46:31,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31" (1/1) ... [2020-08-22 19:46:31,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31" (1/1) ... [2020-08-22 19:46:31,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31" (1/1) ... [2020-08-22 19:46:31,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31" (1/1) ... [2020-08-22 19:46:31,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:31,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:31,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:31,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:31,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:31,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:31,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:31,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:46:31,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:31,804 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:31,804 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:46:31,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:31 BoogieIcfgContainer [2020-08-22 19:46:31,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:31,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:31,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:31,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:31,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:31" (1/3) ... [2020-08-22 19:46:31,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15dcc7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:31, skipping insertion in model container [2020-08-22 19:46:31,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:31" (2/3) ... [2020-08-22 19:46:31,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15dcc7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:31, skipping insertion in model container [2020-08-22 19:46:31,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:31" (3/3) ... [2020-08-22 19:46:31,816 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-08-22 19:46:31,826 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:31,833 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:46:31,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:46:31,866 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:31,866 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:31,866 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:31,866 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:31,867 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:31,867 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:31,867 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:31,867 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:31,881 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-22 19:46:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 19:46:31,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:31,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:31,892 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:31,900 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-08-22 19:46:31,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:31,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101731868] [2020-08-22 19:46:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:31,983 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:32,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101731868] [2020-08-22 19:46:32,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:32,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:46:32,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698730959] [2020-08-22 19:46:32,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:46:32,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:46:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:46:32,068 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-08-22 19:46:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:32,091 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-08-22 19:46:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:46:32,092 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 19:46:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:32,100 INFO L225 Difference]: With dead ends: 29 [2020-08-22 19:46:32,101 INFO L226 Difference]: Without dead ends: 12 [2020-08-22 19:46:32,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:46:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-22 19:46:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-22 19:46:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-22 19:46:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-08-22 19:46:32,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-08-22 19:46:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:32,142 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-08-22 19:46:32,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:46:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-08-22 19:46:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 19:46:32,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:32,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:32,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:32,144 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash -14991171, now seen corresponding path program 1 times [2020-08-22 19:46:32,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:32,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620871648] [2020-08-22 19:46:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:32,147 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:32,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620871648] [2020-08-22 19:46:32,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:32,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:46:32,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208326969] [2020-08-22 19:46:32,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:46:32,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:32,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:46:32,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:46:32,262 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-08-22 19:46:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:32,293 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-22 19:46:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:46:32,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-22 19:46:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:32,296 INFO L225 Difference]: With dead ends: 19 [2020-08-22 19:46:32,296 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 19:46:32,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:46:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 19:46:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-08-22 19:46:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-22 19:46:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-22 19:46:32,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-08-22 19:46:32,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:32,316 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-22 19:46:32,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:46:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-22 19:46:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 19:46:32,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:32,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:32,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:32,321 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash -355776516, now seen corresponding path program 1 times [2020-08-22 19:46:32,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:32,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421090501] [2020-08-22 19:46:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:32,353 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:32,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421090501] [2020-08-22 19:46:32,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:32,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:32,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760637110] [2020-08-22 19:46:32,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:32,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:32,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:32,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:32,448 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-08-22 19:46:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:32,480 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-08-22 19:46:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:32,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-08-22 19:46:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:32,482 INFO L225 Difference]: With dead ends: 21 [2020-08-22 19:46:32,482 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 19:46:32,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 19:46:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-08-22 19:46:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 19:46:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-22 19:46:32,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-08-22 19:46:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:32,490 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-22 19:46:32,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:32,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-22 19:46:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 19:46:32,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:32,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:32,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:32,492 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:32,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1432978565, now seen corresponding path program 2 times [2020-08-22 19:46:32,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:32,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204649670] [2020-08-22 19:46:32,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:32,499 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:32,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204649670] [2020-08-22 19:46:32,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:32,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:46:32,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052104180] [2020-08-22 19:46:32,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:46:32,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:32,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:46:32,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:46:32,609 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-08-22 19:46:32,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:32,643 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-08-22 19:46:32,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:46:32,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 19:46:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:32,644 INFO L225 Difference]: With dead ends: 23 [2020-08-22 19:46:32,645 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 19:46:32,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:46:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 19:46:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-08-22 19:46:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 19:46:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 19:46:32,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-08-22 19:46:32,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:32,652 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 19:46:32,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:46:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 19:46:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 19:46:32,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:32,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:32,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:46:32,654 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:32,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1537029318, now seen corresponding path program 3 times [2020-08-22 19:46:32,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:32,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522531295] [2020-08-22 19:46:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:32,660 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:32,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522531295] [2020-08-22 19:46:32,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:32,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:32,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430244142] [2020-08-22 19:46:32,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:32,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:32,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:32,783 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-08-22 19:46:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:32,824 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-08-22 19:46:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:46:32,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-22 19:46:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:32,826 INFO L225 Difference]: With dead ends: 25 [2020-08-22 19:46:32,826 INFO L226 Difference]: Without dead ends: 20 [2020-08-22 19:46:32,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-22 19:46:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-08-22 19:46:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 19:46:32,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-08-22 19:46:32,833 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-08-22 19:46:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:32,834 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-08-22 19:46:32,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:32,834 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-08-22 19:46:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 19:46:32,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:32,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:32,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:46:32,836 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:32,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1549412153, now seen corresponding path program 4 times [2020-08-22 19:46:32,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:32,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957069131] [2020-08-22 19:46:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:32,841 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:32,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957069131] [2020-08-22 19:46:32,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:32,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:46:32,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962051686] [2020-08-22 19:46:32,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:46:32,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:46:32,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:46:32,958 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-08-22 19:46:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:33,027 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-08-22 19:46:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:46:33,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-08-22 19:46:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:33,029 INFO L225 Difference]: With dead ends: 27 [2020-08-22 19:46:33,029 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 19:46:33,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:46:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 19:46:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-22 19:46:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 19:46:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-08-22 19:46:33,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-08-22 19:46:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:33,037 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-08-22 19:46:33,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:46:33,037 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-08-22 19:46:33,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 19:46:33,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:33,038 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:33,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:46:33,039 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:33,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:33,039 INFO L82 PathProgramCache]: Analyzing trace with hash -202735752, now seen corresponding path program 5 times [2020-08-22 19:46:33,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:33,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880433293] [2020-08-22 19:46:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:33,043 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:33,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880433293] [2020-08-22 19:46:33,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:33,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:46:33,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292061799] [2020-08-22 19:46:33,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:46:33,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:46:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:33,158 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-08-22 19:46:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:33,221 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-22 19:46:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:46:33,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-22 19:46:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:33,223 INFO L225 Difference]: With dead ends: 29 [2020-08-22 19:46:33,223 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 19:46:33,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 19:46:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-22 19:46:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 19:46:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-22 19:46:33,229 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-08-22 19:46:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:33,230 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-22 19:46:33,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:46:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-22 19:46:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 19:46:33,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:33,231 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:33,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:46:33,232 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:33,232 INFO L82 PathProgramCache]: Analyzing trace with hash -389692425, now seen corresponding path program 6 times [2020-08-22 19:46:33,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:33,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307859748] [2020-08-22 19:46:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:33,236 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:33,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307859748] [2020-08-22 19:46:33,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:33,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:46:33,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189597851] [2020-08-22 19:46:33,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:46:33,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:46:33,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:46:33,359 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-08-22 19:46:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:33,436 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-08-22 19:46:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:46:33,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-08-22 19:46:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:33,438 INFO L225 Difference]: With dead ends: 31 [2020-08-22 19:46:33,438 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 19:46:33,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:46:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 19:46:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-22 19:46:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 19:46:33,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-08-22 19:46:33,445 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-08-22 19:46:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:33,445 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-08-22 19:46:33,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:46:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-08-22 19:46:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 19:46:33,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:33,447 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:33,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:46:33,447 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:33,447 INFO L82 PathProgramCache]: Analyzing trace with hash 333571254, now seen corresponding path program 7 times [2020-08-22 19:46:33,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:33,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694159359] [2020-08-22 19:46:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:33,452 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:33,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694159359] [2020-08-22 19:46:33,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:33,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:46:33,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605144194] [2020-08-22 19:46:33,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:46:33,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:33,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:46:33,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:33,589 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-08-22 19:46:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:33,685 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-08-22 19:46:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:46:33,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-08-22 19:46:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:33,687 INFO L225 Difference]: With dead ends: 33 [2020-08-22 19:46:33,687 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 19:46:33,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 19:46:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-22 19:46:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 19:46:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-22 19:46:33,693 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-08-22 19:46:33,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:33,693 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-22 19:46:33,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:46:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-22 19:46:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:46:33,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:33,695 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:33,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:46:33,695 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash -394735179, now seen corresponding path program 8 times [2020-08-22 19:46:33,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:33,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509215950] [2020-08-22 19:46:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:33,700 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:33,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509215950] [2020-08-22 19:46:33,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:33,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:46:33,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667628339] [2020-08-22 19:46:33,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:46:33,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:33,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:46:33,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:46:33,885 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-08-22 19:46:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:34,038 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-08-22 19:46:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 19:46:34,040 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-08-22 19:46:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:34,041 INFO L225 Difference]: With dead ends: 35 [2020-08-22 19:46:34,041 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 19:46:34,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:46:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 19:46:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-22 19:46:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 19:46:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-08-22 19:46:34,060 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-08-22 19:46:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:34,060 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-08-22 19:46:34,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:46:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-08-22 19:46:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 19:46:34,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:34,062 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:34,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:46:34,062 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash -217548044, now seen corresponding path program 9 times [2020-08-22 19:46:34,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:34,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230975055] [2020-08-22 19:46:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:34,067 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:34,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230975055] [2020-08-22 19:46:34,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:34,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:46:34,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651462629] [2020-08-22 19:46:34,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:46:34,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:46:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:46:34,268 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-08-22 19:46:34,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:34,410 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-08-22 19:46:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:46:34,411 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-08-22 19:46:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:34,412 INFO L225 Difference]: With dead ends: 37 [2020-08-22 19:46:34,412 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 19:46:34,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:46:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 19:46:34,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-22 19:46:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 19:46:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-08-22 19:46:34,423 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-08-22 19:46:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:34,424 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-08-22 19:46:34,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:46:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-08-22 19:46:34,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 19:46:34,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:34,425 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:34,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:46:34,426 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1739403149, now seen corresponding path program 10 times [2020-08-22 19:46:34,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:34,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151063532] [2020-08-22 19:46:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:34,431 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:34,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151063532] [2020-08-22 19:46:34,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:34,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:46:34,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117951030] [2020-08-22 19:46:34,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:46:34,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:46:34,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:46:34,658 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-08-22 19:46:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:34,809 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-08-22 19:46:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:46:34,810 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-22 19:46:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:34,810 INFO L225 Difference]: With dead ends: 39 [2020-08-22 19:46:34,811 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 19:46:34,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:46:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 19:46:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 19:46:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 19:46:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-08-22 19:46:34,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-08-22 19:46:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:34,817 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-08-22 19:46:34,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:46:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-08-22 19:46:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 19:46:34,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:34,819 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:34,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:46:34,819 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:34,820 INFO L82 PathProgramCache]: Analyzing trace with hash 341688882, now seen corresponding path program 11 times [2020-08-22 19:46:34,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:34,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79294551] [2020-08-22 19:46:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:34,830 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:35,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79294551] [2020-08-22 19:46:35,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:35,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:46:35,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497626694] [2020-08-22 19:46:35,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:46:35,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:46:35,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:46:35,024 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-08-22 19:46:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:35,214 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-08-22 19:46:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:46:35,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-08-22 19:46:35,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:35,219 INFO L225 Difference]: With dead ends: 41 [2020-08-22 19:46:35,219 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 19:46:35,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:46:35,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 19:46:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-22 19:46:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 19:46:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-08-22 19:46:35,224 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-08-22 19:46:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:35,225 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-08-22 19:46:35,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:46:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-08-22 19:46:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 19:46:35,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:35,226 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:35,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:46:35,227 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:35,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1183629263, now seen corresponding path program 12 times [2020-08-22 19:46:35,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:35,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757920034] [2020-08-22 19:46:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:35,232 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:35,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757920034] [2020-08-22 19:46:35,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:35,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 19:46:35,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665836446] [2020-08-22 19:46:35,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 19:46:35,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:35,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 19:46:35,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:46:35,442 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-08-22 19:46:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:35,644 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-08-22 19:46:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:46:35,645 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-08-22 19:46:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:35,646 INFO L225 Difference]: With dead ends: 43 [2020-08-22 19:46:35,646 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 19:46:35,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:46:35,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 19:46:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-22 19:46:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 19:46:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-08-22 19:46:35,652 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-08-22 19:46:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:35,652 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-08-22 19:46:35,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 19:46:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-08-22 19:46:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 19:46:35,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:35,654 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:35,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:46:35,654 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1864448624, now seen corresponding path program 13 times [2020-08-22 19:46:35,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:35,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935000907] [2020-08-22 19:46:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:35,658 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:35,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935000907] [2020-08-22 19:46:35,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:35,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 19:46:35,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775493164] [2020-08-22 19:46:35,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:46:35,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:35,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:46:35,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:46:35,906 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-08-22 19:46:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:36,132 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-08-22 19:46:36,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:46:36,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-08-22 19:46:36,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:36,133 INFO L225 Difference]: With dead ends: 45 [2020-08-22 19:46:36,133 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 19:46:36,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:46:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 19:46:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-22 19:46:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 19:46:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-08-22 19:46:36,140 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-08-22 19:46:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:36,140 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-08-22 19:46:36,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:46:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-08-22 19:46:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 19:46:36,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:36,141 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:36,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:46:36,142 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:36,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1899602159, now seen corresponding path program 14 times [2020-08-22 19:46:36,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:36,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583821255] [2020-08-22 19:46:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:36,146 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:36,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:36,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583821255] [2020-08-22 19:46:36,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:36,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 19:46:36,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812125186] [2020-08-22 19:46:36,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 19:46:36,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:36,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 19:46:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:46:36,419 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-08-22 19:46:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:36,722 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-08-22 19:46:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:46:36,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-08-22 19:46:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:36,726 INFO L225 Difference]: With dead ends: 47 [2020-08-22 19:46:36,726 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 19:46:36,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:46:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 19:46:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-22 19:46:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 19:46:36,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-08-22 19:46:36,733 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-08-22 19:46:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:36,733 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-08-22 19:46:36,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 19:46:36,733 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-08-22 19:46:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 19:46:36,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:36,734 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:36,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:46:36,734 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1322410926, now seen corresponding path program 15 times [2020-08-22 19:46:36,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:36,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438424093] [2020-08-22 19:46:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:36,740 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:37,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:37,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438424093] [2020-08-22 19:46:37,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:37,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:46:37,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578069057] [2020-08-22 19:46:37,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:46:37,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:37,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:46:37,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:46:37,029 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-08-22 19:46:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:37,327 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-08-22 19:46:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 19:46:37,328 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-08-22 19:46:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:37,328 INFO L225 Difference]: With dead ends: 49 [2020-08-22 19:46:37,328 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 19:46:37,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:46:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 19:46:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-22 19:46:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 19:46:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-08-22 19:46:37,334 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-08-22 19:46:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:37,335 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-08-22 19:46:37,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:46:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-08-22 19:46:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 19:46:37,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:37,336 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:37,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 19:46:37,336 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash 692417197, now seen corresponding path program 16 times [2020-08-22 19:46:37,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:37,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142323527] [2020-08-22 19:46:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:37,346 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:37,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:37,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142323527] [2020-08-22 19:46:37,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:37,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 19:46:37,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117022173] [2020-08-22 19:46:37,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 19:46:37,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 19:46:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:46:37,629 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-08-22 19:46:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:37,978 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-08-22 19:46:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:46:37,979 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-08-22 19:46:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:37,979 INFO L225 Difference]: With dead ends: 51 [2020-08-22 19:46:37,980 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 19:46:37,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:46:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 19:46:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-22 19:46:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 19:46:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-08-22 19:46:37,986 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-08-22 19:46:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:37,986 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-08-22 19:46:37,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 19:46:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-08-22 19:46:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 19:46:37,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:37,987 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:37,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 19:46:37,988 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash 858832364, now seen corresponding path program 17 times [2020-08-22 19:46:37,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:37,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657769217] [2020-08-22 19:46:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:37,991 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:38,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:38,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657769217] [2020-08-22 19:46:38,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:38,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 19:46:38,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893613885] [2020-08-22 19:46:38,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 19:46:38,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:38,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 19:46:38,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:46:38,286 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-08-22 19:46:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:38,670 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-08-22 19:46:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 19:46:38,670 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-08-22 19:46:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:38,671 INFO L225 Difference]: With dead ends: 53 [2020-08-22 19:46:38,671 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 19:46:38,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:46:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 19:46:38,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-22 19:46:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 19:46:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-08-22 19:46:38,677 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-08-22 19:46:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:38,678 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-08-22 19:46:38,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 19:46:38,678 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-08-22 19:46:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 19:46:38,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:38,679 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:38,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 19:46:38,679 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:38,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1870017899, now seen corresponding path program 18 times [2020-08-22 19:46:38,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:38,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545269421] [2020-08-22 19:46:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:38,688 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:39,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545269421] [2020-08-22 19:46:39,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:39,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-08-22 19:46:39,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584825000] [2020-08-22 19:46:39,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 19:46:39,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:39,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 19:46:39,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:46:39,071 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-08-22 19:46:39,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:39,480 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-08-22 19:46:39,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 19:46:39,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-08-22 19:46:39,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:39,481 INFO L225 Difference]: With dead ends: 55 [2020-08-22 19:46:39,481 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 19:46:39,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:46:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 19:46:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-22 19:46:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 19:46:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-08-22 19:46:39,487 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-08-22 19:46:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:39,487 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-08-22 19:46:39,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 19:46:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-08-22 19:46:39,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 19:46:39,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:39,488 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:39,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 19:46:39,489 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1338259158, now seen corresponding path program 19 times [2020-08-22 19:46:39,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:39,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304905571] [2020-08-22 19:46:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:39,494 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:39,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304905571] [2020-08-22 19:46:39,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:39,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-08-22 19:46:39,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526979966] [2020-08-22 19:46:39,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 19:46:39,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:39,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 19:46:39,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:46:39,898 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-08-22 19:46:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:40,385 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-08-22 19:46:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 19:46:40,386 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-08-22 19:46:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:40,386 INFO L225 Difference]: With dead ends: 57 [2020-08-22 19:46:40,387 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 19:46:40,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:46:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 19:46:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-22 19:46:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 19:46:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-08-22 19:46:40,399 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-08-22 19:46:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:40,399 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-08-22 19:46:40,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 19:46:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-08-22 19:46:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 19:46:40,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:40,400 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:40,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 19:46:40,404 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash -705992407, now seen corresponding path program 20 times [2020-08-22 19:46:40,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:40,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18281172] [2020-08-22 19:46:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:40,410 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:40,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:40,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18281172] [2020-08-22 19:46:40,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:40,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-08-22 19:46:40,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485901163] [2020-08-22 19:46:40,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 19:46:40,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:40,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 19:46:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-08-22 19:46:40,968 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-08-22 19:46:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:41,566 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-08-22 19:46:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 19:46:41,568 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-08-22 19:46:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:41,569 INFO L225 Difference]: With dead ends: 59 [2020-08-22 19:46:41,569 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 19:46:41,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-08-22 19:46:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 19:46:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-22 19:46:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 19:46:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-08-22 19:46:41,575 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-08-22 19:46:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:41,575 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-08-22 19:46:41,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 19:46:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-08-22 19:46:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 19:46:41,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:41,576 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:41,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 19:46:41,577 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1311966568, now seen corresponding path program 21 times [2020-08-22 19:46:41,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:41,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971583663] [2020-08-22 19:46:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:41,582 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:42,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:42,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971583663] [2020-08-22 19:46:42,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:42,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-08-22 19:46:42,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030322792] [2020-08-22 19:46:42,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 19:46:42,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:42,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 19:46:42,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-08-22 19:46:42,047 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-08-22 19:46:42,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:42,573 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-08-22 19:46:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 19:46:42,574 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-08-22 19:46:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:42,575 INFO L225 Difference]: With dead ends: 61 [2020-08-22 19:46:42,575 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 19:46:42,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-08-22 19:46:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 19:46:42,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-22 19:46:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 19:46:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-08-22 19:46:42,580 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-08-22 19:46:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:42,580 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-08-22 19:46:42,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 19:46:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-08-22 19:46:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 19:46:42,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:42,581 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:42,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 19:46:42,582 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:42,582 INFO L82 PathProgramCache]: Analyzing trace with hash -754676249, now seen corresponding path program 22 times [2020-08-22 19:46:42,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:42,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662859765] [2020-08-22 19:46:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:42,586 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:43,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:43,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662859765] [2020-08-22 19:46:43,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:43,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-08-22 19:46:43,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818608166] [2020-08-22 19:46:43,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 19:46:43,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 19:46:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-22 19:46:43,042 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-08-22 19:46:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:43,640 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-08-22 19:46:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 19:46:43,640 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-08-22 19:46:43,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:43,641 INFO L225 Difference]: With dead ends: 63 [2020-08-22 19:46:43,642 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 19:46:43,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-22 19:46:43,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 19:46:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-22 19:46:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 19:46:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-08-22 19:46:43,647 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-08-22 19:46:43,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:43,647 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-08-22 19:46:43,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 19:46:43,647 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-08-22 19:46:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 19:46:43,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:43,648 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:43,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 19:46:43,648 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1771434662, now seen corresponding path program 23 times [2020-08-22 19:46:43,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:43,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328907626] [2020-08-22 19:46:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:43,653 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:44,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:44,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328907626] [2020-08-22 19:46:44,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:44,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-08-22 19:46:44,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651410190] [2020-08-22 19:46:44,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 19:46:44,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 19:46:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-08-22 19:46:44,138 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-08-22 19:46:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:44,815 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-22 19:46:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 19:46:44,815 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-08-22 19:46:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:44,816 INFO L225 Difference]: With dead ends: 65 [2020-08-22 19:46:44,816 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 19:46:44,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-08-22 19:46:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 19:46:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-22 19:46:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 19:46:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-22 19:46:44,822 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-08-22 19:46:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:44,822 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-22 19:46:44,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 19:46:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-22 19:46:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 19:46:44,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:44,823 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:44,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 19:46:44,823 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:44,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1587469403, now seen corresponding path program 24 times [2020-08-22 19:46:44,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:44,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350760168] [2020-08-22 19:46:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:44,833 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:45,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:45,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350760168] [2020-08-22 19:46:45,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:45,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-08-22 19:46:45,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689165574] [2020-08-22 19:46:45,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 19:46:45,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:45,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 19:46:45,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:46:45,386 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-08-22 19:46:46,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:46,115 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-08-22 19:46:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 19:46:46,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-08-22 19:46:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:46,118 INFO L225 Difference]: With dead ends: 67 [2020-08-22 19:46:46,118 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 19:46:46,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:46:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 19:46:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-22 19:46:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 19:46:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-08-22 19:46:46,122 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-08-22 19:46:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:46,123 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-08-22 19:46:46,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 19:46:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-08-22 19:46:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 19:46:46,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:46,124 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:46,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 19:46:46,124 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash 321130724, now seen corresponding path program 25 times [2020-08-22 19:46:46,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:46,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784965520] [2020-08-22 19:46:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:46,129 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:46,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:46,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784965520] [2020-08-22 19:46:46,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:46,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-08-22 19:46:46,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999156245] [2020-08-22 19:46:46,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 19:46:46,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:46,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 19:46:46,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-08-22 19:46:46,684 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-08-22 19:46:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:47,478 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-08-22 19:46:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 19:46:47,482 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-08-22 19:46:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:47,483 INFO L225 Difference]: With dead ends: 69 [2020-08-22 19:46:47,483 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 19:46:47,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-08-22 19:46:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 19:46:47,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-22 19:46:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 19:46:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-08-22 19:46:47,490 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-08-22 19:46:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:47,490 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-08-22 19:46:47,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 19:46:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-08-22 19:46:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 19:46:47,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:47,491 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:47,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 19:46:47,491 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:47,492 INFO L82 PathProgramCache]: Analyzing trace with hash 534817379, now seen corresponding path program 26 times [2020-08-22 19:46:47,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:47,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029036368] [2020-08-22 19:46:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:47,500 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:48,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:48,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029036368] [2020-08-22 19:46:48,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:48,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-08-22 19:46:48,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570857546] [2020-08-22 19:46:48,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 19:46:48,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:48,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 19:46:48,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:46:48,037 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-08-22 19:46:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:48,887 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-08-22 19:46:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 19:46:48,888 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-08-22 19:46:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:48,890 INFO L225 Difference]: With dead ends: 71 [2020-08-22 19:46:48,890 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 19:46:48,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:46:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 19:46:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-22 19:46:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 19:46:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-08-22 19:46:48,897 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-08-22 19:46:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:48,897 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-08-22 19:46:48,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 19:46:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-08-22 19:46:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 19:46:48,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:48,898 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:48,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 19:46:48,899 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:48,899 INFO L82 PathProgramCache]: Analyzing trace with hash -270737374, now seen corresponding path program 27 times [2020-08-22 19:46:48,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:48,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133344573] [2020-08-22 19:46:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:48,904 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:49,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:49,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133344573] [2020-08-22 19:46:49,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:49,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-08-22 19:46:49,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543848748] [2020-08-22 19:46:49,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 19:46:49,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:49,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 19:46:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-08-22 19:46:49,533 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-08-22 19:46:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:50,452 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-08-22 19:46:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 19:46:50,453 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-08-22 19:46:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:50,454 INFO L225 Difference]: With dead ends: 73 [2020-08-22 19:46:50,454 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 19:46:50,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-08-22 19:46:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 19:46:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-22 19:46:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 19:46:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-08-22 19:46:50,459 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-08-22 19:46:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:50,460 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-08-22 19:46:50,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 19:46:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-08-22 19:46:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 19:46:50,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:50,461 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:50,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 19:46:50,461 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1314741727, now seen corresponding path program 28 times [2020-08-22 19:46:50,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:50,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061007188] [2020-08-22 19:46:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:50,465 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:51,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:51,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061007188] [2020-08-22 19:46:51,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:51,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-08-22 19:46:51,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230066888] [2020-08-22 19:46:51,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 19:46:51,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:51,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 19:46:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-08-22 19:46:51,141 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-08-22 19:46:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:52,129 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-08-22 19:46:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 19:46:52,129 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-08-22 19:46:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:52,130 INFO L225 Difference]: With dead ends: 75 [2020-08-22 19:46:52,130 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 19:46:52,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-08-22 19:46:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 19:46:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-22 19:46:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 19:46:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-08-22 19:46:52,136 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-08-22 19:46:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:52,137 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-08-22 19:46:52,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 19:46:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-08-22 19:46:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 19:46:52,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:52,138 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:52,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 19:46:52,141 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:52,141 INFO L82 PathProgramCache]: Analyzing trace with hash 419422304, now seen corresponding path program 29 times [2020-08-22 19:46:52,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:52,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907970263] [2020-08-22 19:46:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:52,150 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:53,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:53,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907970263] [2020-08-22 19:46:53,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:53,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-08-22 19:46:53,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741912443] [2020-08-22 19:46:53,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 19:46:53,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 19:46:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-08-22 19:46:53,035 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-08-22 19:46:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:54,075 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-08-22 19:46:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 19:46:54,076 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-08-22 19:46:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:54,077 INFO L225 Difference]: With dead ends: 77 [2020-08-22 19:46:54,077 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 19:46:54,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-08-22 19:46:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 19:46:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-22 19:46:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 19:46:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-08-22 19:46:54,083 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-08-22 19:46:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:54,083 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-08-22 19:46:54,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 19:46:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-08-22 19:46:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 19:46:54,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:54,084 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:54,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 19:46:54,084 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:54,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:54,084 INFO L82 PathProgramCache]: Analyzing trace with hash 503745247, now seen corresponding path program 30 times [2020-08-22 19:46:54,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:54,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057914685] [2020-08-22 19:46:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:54,093 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:54,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:54,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057914685] [2020-08-22 19:46:54,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:54,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-08-22 19:46:54,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143871031] [2020-08-22 19:46:54,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 19:46:54,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:54,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 19:46:54,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 19:46:54,856 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-08-22 19:46:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:55,990 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-08-22 19:46:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 19:46:55,991 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-08-22 19:46:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:55,992 INFO L225 Difference]: With dead ends: 79 [2020-08-22 19:46:55,992 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 19:46:55,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 19:46:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 19:46:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-22 19:46:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 19:46:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-08-22 19:46:55,998 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-08-22 19:46:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:55,999 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-08-22 19:46:55,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 19:46:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-08-22 19:46:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 19:46:55,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:56,000 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:56,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 19:46:56,000 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:56,000 INFO L82 PathProgramCache]: Analyzing trace with hash -66285154, now seen corresponding path program 31 times [2020-08-22 19:46:56,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:56,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802870489] [2020-08-22 19:46:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:56,006 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:56,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:57,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802870489] [2020-08-22 19:46:57,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:57,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-08-22 19:46:57,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52492138] [2020-08-22 19:46:57,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 19:46:57,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 19:46:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 19:46:57,006 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-08-22 19:46:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:58,163 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-08-22 19:46:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 19:46:58,164 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-08-22 19:46:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:58,165 INFO L225 Difference]: With dead ends: 81 [2020-08-22 19:46:58,166 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 19:46:58,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 19:46:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 19:46:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-22 19:46:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 19:46:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-08-22 19:46:58,172 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-08-22 19:46:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:58,172 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-08-22 19:46:58,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 19:46:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-08-22 19:46:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 19:46:58,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:58,173 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:58,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 19:46:58,173 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:58,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1890313373, now seen corresponding path program 32 times [2020-08-22 19:46:58,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:58,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519478890] [2020-08-22 19:46:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:58,176 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:59,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:59,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519478890] [2020-08-22 19:46:59,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:59,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-08-22 19:46:59,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695597241] [2020-08-22 19:46:59,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 19:46:59,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:59,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 19:46:59,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 19:46:59,071 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-08-22 19:47:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:00,342 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-08-22 19:47:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 19:47:00,343 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-08-22 19:47:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:00,344 INFO L225 Difference]: With dead ends: 83 [2020-08-22 19:47:00,344 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 19:47:00,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 19:47:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 19:47:00,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-22 19:47:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 19:47:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-08-22 19:47:00,350 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-08-22 19:47:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:00,350 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-08-22 19:47:00,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 19:47:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-08-22 19:47:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 19:47:00,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:00,351 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:00,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 19:47:00,352 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash 985822172, now seen corresponding path program 33 times [2020-08-22 19:47:00,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:00,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397298891] [2020-08-22 19:47:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:00,360 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:01,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:01,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397298891] [2020-08-22 19:47:01,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:01,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-08-22 19:47:01,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081703584] [2020-08-22 19:47:01,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 19:47:01,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 19:47:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 19:47:01,234 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-08-22 19:47:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:02,577 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-08-22 19:47:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 19:47:02,578 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-08-22 19:47:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:02,579 INFO L225 Difference]: With dead ends: 85 [2020-08-22 19:47:02,579 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 19:47:02,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 19:47:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 19:47:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-22 19:47:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 19:47:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-08-22 19:47:02,584 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-08-22 19:47:02,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:02,584 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-08-22 19:47:02,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 19:47:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-08-22 19:47:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 19:47:02,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:02,585 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:02,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 19:47:02,585 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash -646828197, now seen corresponding path program 34 times [2020-08-22 19:47:02,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:02,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536704385] [2020-08-22 19:47:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:02,587 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:03,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:03,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536704385] [2020-08-22 19:47:03,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:03,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-08-22 19:47:03,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350767746] [2020-08-22 19:47:03,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 19:47:03,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:03,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 19:47:03,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 19:47:03,542 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-08-22 19:47:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:04,981 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-08-22 19:47:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 19:47:04,981 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-08-22 19:47:04,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:04,982 INFO L225 Difference]: With dead ends: 87 [2020-08-22 19:47:04,983 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 19:47:04,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 19:47:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 19:47:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-22 19:47:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 19:47:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-08-22 19:47:04,987 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-08-22 19:47:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:04,988 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-08-22 19:47:04,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 19:47:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-08-22 19:47:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 19:47:04,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:04,989 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:04,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 19:47:04,989 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1960769766, now seen corresponding path program 35 times [2020-08-22 19:47:04,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:04,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757277837] [2020-08-22 19:47:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:04,991 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:05,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:05,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757277837] [2020-08-22 19:47:05,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:05,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-08-22 19:47:05,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943637213] [2020-08-22 19:47:05,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 19:47:05,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:05,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 19:47:05,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 19:47:05,980 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-08-22 19:47:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:07,515 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-08-22 19:47:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 19:47:07,517 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-08-22 19:47:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:07,518 INFO L225 Difference]: With dead ends: 89 [2020-08-22 19:47:07,518 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 19:47:07,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 19:47:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 19:47:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-22 19:47:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 19:47:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-08-22 19:47:07,524 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-08-22 19:47:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:07,525 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-08-22 19:47:07,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 19:47:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-08-22 19:47:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 19:47:07,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:07,526 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:07,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 19:47:07,526 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:07,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:07,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1938232551, now seen corresponding path program 36 times [2020-08-22 19:47:07,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:07,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866101265] [2020-08-22 19:47:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:07,535 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:08,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:08,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866101265] [2020-08-22 19:47:08,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:08,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-08-22 19:47:08,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551318315] [2020-08-22 19:47:08,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 19:47:08,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:08,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 19:47:08,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 19:47:08,563 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-08-22 19:47:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:10,182 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-08-22 19:47:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 19:47:10,183 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-08-22 19:47:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:10,184 INFO L225 Difference]: With dead ends: 91 [2020-08-22 19:47:10,184 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 19:47:10,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 19:47:10,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 19:47:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-22 19:47:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 19:47:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-08-22 19:47:10,189 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-08-22 19:47:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:10,190 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-08-22 19:47:10,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 19:47:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-08-22 19:47:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 19:47:10,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:10,191 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:10,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 19:47:10,191 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:10,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1754805416, now seen corresponding path program 37 times [2020-08-22 19:47:10,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:10,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796662548] [2020-08-22 19:47:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:10,194 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:11,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:11,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796662548] [2020-08-22 19:47:11,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:11,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-08-22 19:47:11,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731300175] [2020-08-22 19:47:11,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 19:47:11,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:11,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 19:47:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 19:47:11,305 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-08-22 19:47:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:13,016 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-08-22 19:47:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 19:47:13,017 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-08-22 19:47:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:13,018 INFO L225 Difference]: With dead ends: 93 [2020-08-22 19:47:13,018 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 19:47:13,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 19:47:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 19:47:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-22 19:47:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 19:47:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-08-22 19:47:13,024 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-08-22 19:47:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:13,024 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-08-22 19:47:13,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 19:47:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-08-22 19:47:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 19:47:13,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:13,025 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:13,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 19:47:13,026 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:13,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1574987817, now seen corresponding path program 38 times [2020-08-22 19:47:13,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:13,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98688817] [2020-08-22 19:47:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:13,028 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:14,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:14,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98688817] [2020-08-22 19:47:14,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:14,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-08-22 19:47:14,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245865166] [2020-08-22 19:47:14,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 19:47:14,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 19:47:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 19:47:14,254 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-08-22 19:47:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:16,049 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-08-22 19:47:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 19:47:16,052 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-08-22 19:47:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:16,053 INFO L225 Difference]: With dead ends: 95 [2020-08-22 19:47:16,053 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 19:47:16,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 19:47:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 19:47:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-22 19:47:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 19:47:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-08-22 19:47:16,058 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-08-22 19:47:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:16,059 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-08-22 19:47:16,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 19:47:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-08-22 19:47:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 19:47:16,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:16,060 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:16,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 19:47:16,060 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:16,061 INFO L82 PathProgramCache]: Analyzing trace with hash -568967018, now seen corresponding path program 39 times [2020-08-22 19:47:16,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:16,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757096706] [2020-08-22 19:47:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:16,070 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:17,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:17,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757096706] [2020-08-22 19:47:17,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:17,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-08-22 19:47:17,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55404268] [2020-08-22 19:47:17,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 19:47:17,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 19:47:17,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 19:47:17,305 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-08-22 19:47:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:19,206 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2020-08-22 19:47:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 19:47:19,206 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-08-22 19:47:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:19,207 INFO L225 Difference]: With dead ends: 97 [2020-08-22 19:47:19,208 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 19:47:19,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 19:47:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 19:47:19,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-22 19:47:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 19:47:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-08-22 19:47:19,214 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-08-22 19:47:19,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:19,215 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-08-22 19:47:19,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 19:47:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-08-22 19:47:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 19:47:19,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:19,216 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:19,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 19:47:19,216 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash -150620779, now seen corresponding path program 40 times [2020-08-22 19:47:19,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:19,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515052989] [2020-08-22 19:47:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:19,220 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:20,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:20,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515052989] [2020-08-22 19:47:20,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:20,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-08-22 19:47:20,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893165887] [2020-08-22 19:47:20,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 19:47:20,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 19:47:20,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 19:47:20,500 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-08-22 19:47:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:22,518 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-08-22 19:47:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 19:47:22,519 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-08-22 19:47:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:22,520 INFO L225 Difference]: With dead ends: 99 [2020-08-22 19:47:22,520 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 19:47:22,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 19:47:22,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 19:47:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-22 19:47:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 19:47:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-08-22 19:47:22,527 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-08-22 19:47:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:22,527 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-08-22 19:47:22,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 19:47:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-08-22 19:47:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 19:47:22,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:22,528 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:22,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 19:47:22,529 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:22,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1846810924, now seen corresponding path program 41 times [2020-08-22 19:47:22,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:22,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988647725] [2020-08-22 19:47:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:22,532 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:23,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:23,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988647725] [2020-08-22 19:47:23,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:23,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-08-22 19:47:23,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083334311] [2020-08-22 19:47:23,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 19:47:23,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 19:47:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 19:47:23,874 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-08-22 19:47:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:26,000 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-08-22 19:47:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 19:47:26,003 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-08-22 19:47:26,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:26,004 INFO L225 Difference]: With dead ends: 101 [2020-08-22 19:47:26,004 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 19:47:26,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 19:47:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 19:47:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-22 19:47:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 19:47:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-08-22 19:47:26,011 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-08-22 19:47:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:26,012 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-08-22 19:47:26,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 19:47:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-08-22 19:47:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 19:47:26,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:26,015 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:26,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 19:47:26,015 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash 202032211, now seen corresponding path program 42 times [2020-08-22 19:47:26,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:26,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801186034] [2020-08-22 19:47:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:26,023 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:27,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801186034] [2020-08-22 19:47:27,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:27,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-08-22 19:47:27,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470978107] [2020-08-22 19:47:27,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 19:47:27,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:27,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 19:47:27,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 19:47:27,402 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-08-22 19:47:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:29,629 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-08-22 19:47:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 19:47:29,630 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-08-22 19:47:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:29,631 INFO L225 Difference]: With dead ends: 103 [2020-08-22 19:47:29,631 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 19:47:29,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 19:47:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 19:47:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-22 19:47:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 19:47:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-08-22 19:47:29,637 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-08-22 19:47:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:29,638 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-08-22 19:47:29,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 19:47:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-08-22 19:47:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 19:47:29,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:29,639 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:29,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 19:47:29,639 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2045263378, now seen corresponding path program 43 times [2020-08-22 19:47:29,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:29,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000492670] [2020-08-22 19:47:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:29,642 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:31,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000492670] [2020-08-22 19:47:31,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:31,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-08-22 19:47:31,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383535911] [2020-08-22 19:47:31,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 19:47:31,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:31,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 19:47:31,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 19:47:31,075 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-08-22 19:47:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:33,422 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-08-22 19:47:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 19:47:33,422 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-08-22 19:47:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:33,424 INFO L225 Difference]: With dead ends: 105 [2020-08-22 19:47:33,424 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 19:47:33,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 19:47:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 19:47:33,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-22 19:47:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 19:47:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-08-22 19:47:33,430 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-08-22 19:47:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:33,430 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-08-22 19:47:33,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 19:47:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-08-22 19:47:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 19:47:33,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:33,431 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:33,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 19:47:33,432 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:33,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:33,432 INFO L82 PathProgramCache]: Analyzing trace with hash -431078383, now seen corresponding path program 44 times [2020-08-22 19:47:33,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:33,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635946054] [2020-08-22 19:47:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:33,436 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:34,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635946054] [2020-08-22 19:47:34,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:34,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-08-22 19:47:34,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762865044] [2020-08-22 19:47:34,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 19:47:34,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:34,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 19:47:34,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 19:47:34,932 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-08-22 19:47:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:37,391 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-08-22 19:47:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 19:47:37,393 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-08-22 19:47:37,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:37,394 INFO L225 Difference]: With dead ends: 107 [2020-08-22 19:47:37,394 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 19:47:37,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 19:47:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 19:47:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-22 19:47:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 19:47:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-08-22 19:47:37,401 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-08-22 19:47:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:37,401 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-08-22 19:47:37,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 19:47:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-08-22 19:47:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 19:47:37,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:37,402 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:37,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 19:47:37,402 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:37,403 INFO L82 PathProgramCache]: Analyzing trace with hash -783628720, now seen corresponding path program 45 times [2020-08-22 19:47:37,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:37,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403499372] [2020-08-22 19:47:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:37,408 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:38,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:38,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403499372] [2020-08-22 19:47:38,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:38,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-08-22 19:47:38,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851076946] [2020-08-22 19:47:38,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 19:47:38,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:38,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 19:47:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 19:47:38,968 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-08-22 19:47:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:41,525 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2020-08-22 19:47:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-22 19:47:41,526 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-08-22 19:47:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:41,528 INFO L225 Difference]: With dead ends: 109 [2020-08-22 19:47:41,528 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 19:47:41,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 19:47:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 19:47:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-22 19:47:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 19:47:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-08-22 19:47:41,536 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-08-22 19:47:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:41,537 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-08-22 19:47:41,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 19:47:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-08-22 19:47:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-22 19:47:41,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:41,541 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:41,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 19:47:41,541 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:41,542 INFO L82 PathProgramCache]: Analyzing trace with hash -282086193, now seen corresponding path program 46 times [2020-08-22 19:47:41,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:41,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252274706] [2020-08-22 19:47:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:41,545 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:43,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:43,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252274706] [2020-08-22 19:47:43,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:43,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-08-22 19:47:43,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265763477] [2020-08-22 19:47:43,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 19:47:43,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:43,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 19:47:43,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 19:47:43,223 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-08-22 19:47:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:45,922 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-08-22 19:47:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 19:47:45,923 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-08-22 19:47:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:45,924 INFO L225 Difference]: With dead ends: 111 [2020-08-22 19:47:45,924 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 19:47:45,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 19:47:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 19:47:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-22 19:47:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 19:47:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-08-22 19:47:45,929 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-08-22 19:47:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:45,930 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-08-22 19:47:45,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 19:47:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-08-22 19:47:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 19:47:45,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:45,931 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:45,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 19:47:45,931 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash 663945102, now seen corresponding path program 47 times [2020-08-22 19:47:45,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:45,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868115174] [2020-08-22 19:47:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:45,938 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:47,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:47,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868115174] [2020-08-22 19:47:47,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:47,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-08-22 19:47:47,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45217587] [2020-08-22 19:47:47,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 19:47:47,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 19:47:47,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 19:47:47,634 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-08-22 19:47:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:50,434 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-08-22 19:47:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-22 19:47:50,435 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-08-22 19:47:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:50,436 INFO L225 Difference]: With dead ends: 113 [2020-08-22 19:47:50,436 INFO L226 Difference]: Without dead ends: 108 [2020-08-22 19:47:50,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 19:47:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-22 19:47:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-08-22 19:47:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 19:47:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-08-22 19:47:50,443 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-08-22 19:47:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:50,443 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-08-22 19:47:50,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 19:47:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-08-22 19:47:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 19:47:50,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:50,444 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:50,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 19:47:50,445 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -733047155, now seen corresponding path program 48 times [2020-08-22 19:47:50,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:50,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122013866] [2020-08-22 19:47:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:50,448 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:52,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:52,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122013866] [2020-08-22 19:47:52,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:52,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-08-22 19:47:52,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417853003] [2020-08-22 19:47:52,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 19:47:52,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:52,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 19:47:52,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 19:47:52,212 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-08-22 19:47:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:55,180 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-08-22 19:47:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 19:47:55,182 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-08-22 19:47:55,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:55,183 INFO L225 Difference]: With dead ends: 115 [2020-08-22 19:47:55,183 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 19:47:55,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 19:47:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 19:47:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-08-22 19:47:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 19:47:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-08-22 19:47:55,189 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-08-22 19:47:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:55,189 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-08-22 19:47:55,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 19:47:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-08-22 19:47:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 19:47:55,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:55,190 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:55,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 19:47:55,190 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1082157516, now seen corresponding path program 49 times [2020-08-22 19:47:55,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:55,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075699147] [2020-08-22 19:47:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:55,202 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:57,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075699147] [2020-08-22 19:47:57,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:57,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-08-22 19:47:57,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020578117] [2020-08-22 19:47:57,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 19:47:57,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:57,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 19:47:57,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 19:47:57,111 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-08-22 19:48:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:00,211 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2020-08-22 19:48:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-22 19:48:00,213 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-08-22 19:48:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:00,215 INFO L225 Difference]: With dead ends: 117 [2020-08-22 19:48:00,215 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 19:48:00,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 19:48:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 19:48:00,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-08-22 19:48:00,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 19:48:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-08-22 19:48:00,221 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-08-22 19:48:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:00,221 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-08-22 19:48:00,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 19:48:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-08-22 19:48:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 19:48:00,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:00,222 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:00,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 19:48:00,222 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:00,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:00,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1737124171, now seen corresponding path program 50 times [2020-08-22 19:48:00,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:00,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488802312] [2020-08-22 19:48:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:00,232 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:02,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:02,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488802312] [2020-08-22 19:48:02,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:02,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-08-22 19:48:02,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586158527] [2020-08-22 19:48:02,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 19:48:02,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:02,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 19:48:02,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 19:48:02,124 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-08-22 19:48:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:05,352 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2020-08-22 19:48:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 19:48:05,356 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-08-22 19:48:05,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:05,357 INFO L225 Difference]: With dead ends: 119 [2020-08-22 19:48:05,357 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 19:48:05,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 19:48:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 19:48:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-08-22 19:48:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 19:48:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-08-22 19:48:05,363 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-08-22 19:48:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:05,363 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-08-22 19:48:05,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 19:48:05,364 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-08-22 19:48:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 19:48:05,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:05,364 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:05,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 19:48:05,365 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -200112886, now seen corresponding path program 51 times [2020-08-22 19:48:05,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:05,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557375291] [2020-08-22 19:48:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:05,368 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:07,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:07,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557375291] [2020-08-22 19:48:07,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:07,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-08-22 19:48:07,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420435120] [2020-08-22 19:48:07,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 19:48:07,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:07,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 19:48:07,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 19:48:07,334 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-08-22 19:48:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:10,723 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-08-22 19:48:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-08-22 19:48:10,723 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-08-22 19:48:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:10,725 INFO L225 Difference]: With dead ends: 121 [2020-08-22 19:48:10,725 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 19:48:10,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 19:48:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 19:48:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-08-22 19:48:10,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-08-22 19:48:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-08-22 19:48:10,731 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-08-22 19:48:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:10,731 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-08-22 19:48:10,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 19:48:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-08-22 19:48:10,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-08-22 19:48:10,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:10,732 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:10,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 19:48:10,732 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2130881801, now seen corresponding path program 52 times [2020-08-22 19:48:10,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:10,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998299282] [2020-08-22 19:48:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:10,735 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:12,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:12,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998299282] [2020-08-22 19:48:12,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:12,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-08-22 19:48:12,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926916054] [2020-08-22 19:48:12,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 19:48:12,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:12,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 19:48:12,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 19:48:12,789 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-08-22 19:48:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:16,325 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-08-22 19:48:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 19:48:16,326 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-08-22 19:48:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:16,327 INFO L225 Difference]: With dead ends: 123 [2020-08-22 19:48:16,327 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 19:48:16,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 19:48:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 19:48:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-08-22 19:48:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 19:48:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-08-22 19:48:16,334 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-08-22 19:48:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:16,335 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-08-22 19:48:16,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 19:48:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-08-22 19:48:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 19:48:16,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:16,336 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:16,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 19:48:16,336 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash 243847496, now seen corresponding path program 53 times [2020-08-22 19:48:16,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:16,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283715503] [2020-08-22 19:48:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:16,347 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:18,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:18,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283715503] [2020-08-22 19:48:18,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:18,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-08-22 19:48:18,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093229181] [2020-08-22 19:48:18,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-22 19:48:18,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:18,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-22 19:48:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 19:48:18,697 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-08-22 19:48:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:22,422 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2020-08-22 19:48:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-22 19:48:22,422 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-08-22 19:48:22,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:22,424 INFO L225 Difference]: With dead ends: 125 [2020-08-22 19:48:22,424 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 19:48:22,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 19:48:22,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 19:48:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-08-22 19:48:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 19:48:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-08-22 19:48:22,430 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-08-22 19:48:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:22,431 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-08-22 19:48:22,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-08-22 19:48:22,431 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-08-22 19:48:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 19:48:22,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:22,432 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:22,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 19:48:22,432 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash -719920697, now seen corresponding path program 54 times [2020-08-22 19:48:22,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:22,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954406418] [2020-08-22 19:48:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:22,441 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:24,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:24,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954406418] [2020-08-22 19:48:24,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:24,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-08-22 19:48:24,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392558180] [2020-08-22 19:48:24,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 19:48:24,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:24,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 19:48:24,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 19:48:24,659 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-08-22 19:48:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:28,450 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2020-08-22 19:48:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 19:48:28,451 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-08-22 19:48:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:28,452 INFO L225 Difference]: With dead ends: 127 [2020-08-22 19:48:28,452 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 19:48:28,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 19:48:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 19:48:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-08-22 19:48:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-08-22 19:48:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-08-22 19:48:28,458 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-08-22 19:48:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:28,459 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-08-22 19:48:28,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 19:48:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-08-22 19:48:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-22 19:48:28,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:28,460 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:28,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 19:48:28,460 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash 811781766, now seen corresponding path program 55 times [2020-08-22 19:48:28,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:28,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431138249] [2020-08-22 19:48:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:28,465 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:30,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:30,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431138249] [2020-08-22 19:48:30,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:30,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-08-22 19:48:30,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9914817] [2020-08-22 19:48:30,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-22 19:48:30,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:30,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-22 19:48:30,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 19:48:30,774 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-08-22 19:48:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:34,797 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2020-08-22 19:48:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-22 19:48:34,797 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-08-22 19:48:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:34,799 INFO L225 Difference]: With dead ends: 129 [2020-08-22 19:48:34,799 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 19:48:34,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 19:48:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 19:48:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-08-22 19:48:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 19:48:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-08-22 19:48:34,805 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-08-22 19:48:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:34,805 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-08-22 19:48:34,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-22 19:48:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-08-22 19:48:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 19:48:34,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:34,806 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:34,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 19:48:34,807 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:34,807 INFO L82 PathProgramCache]: Analyzing trace with hash -395933819, now seen corresponding path program 56 times [2020-08-22 19:48:34,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:34,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733296669] [2020-08-22 19:48:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:34,813 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:37,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:37,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733296669] [2020-08-22 19:48:37,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:37,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-08-22 19:48:37,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993523484] [2020-08-22 19:48:37,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-22 19:48:37,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-22 19:48:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 19:48:37,200 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-08-22 19:48:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:41,467 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-08-22 19:48:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 19:48:41,468 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-08-22 19:48:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:41,469 INFO L225 Difference]: With dead ends: 131 [2020-08-22 19:48:41,470 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 19:48:41,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 19:48:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 19:48:41,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-08-22 19:48:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 19:48:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-08-22 19:48:41,476 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-08-22 19:48:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:41,477 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-08-22 19:48:41,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-22 19:48:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-08-22 19:48:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 19:48:41,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:41,478 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:41,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 19:48:41,478 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1369441084, now seen corresponding path program 57 times [2020-08-22 19:48:41,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:41,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871986831] [2020-08-22 19:48:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:41,486 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:43,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:43,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871986831] [2020-08-22 19:48:43,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:43,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-08-22 19:48:43,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475574364] [2020-08-22 19:48:43,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-08-22 19:48:43,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:43,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-08-22 19:48:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 19:48:43,965 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-08-22 19:48:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:48,221 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2020-08-22 19:48:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-08-22 19:48:48,221 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-08-22 19:48:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:48,222 INFO L225 Difference]: With dead ends: 133 [2020-08-22 19:48:48,222 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 19:48:48,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 19:48:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 19:48:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-08-22 19:48:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-22 19:48:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-08-22 19:48:48,229 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-08-22 19:48:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:48,229 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-08-22 19:48:48,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-08-22 19:48:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-08-22 19:48:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 19:48:48,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:48,230 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:48,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 19:48:48,231 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:48,231 INFO L82 PathProgramCache]: Analyzing trace with hash -607052221, now seen corresponding path program 58 times [2020-08-22 19:48:48,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:48,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182695257] [2020-08-22 19:48:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:48,239 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:50,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:50,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182695257] [2020-08-22 19:48:50,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:50,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-08-22 19:48:50,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446628870] [2020-08-22 19:48:50,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-22 19:48:50,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:50,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-22 19:48:50,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 19:48:50,793 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-08-22 19:48:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:55,127 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-08-22 19:48:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 19:48:55,128 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-08-22 19:48:55,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:55,129 INFO L225 Difference]: With dead ends: 135 [2020-08-22 19:48:55,129 INFO L226 Difference]: Without dead ends: 130 [2020-08-22 19:48:55,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 19:48:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-22 19:48:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-08-22 19:48:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-22 19:48:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-08-22 19:48:55,135 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-08-22 19:48:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:55,136 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-08-22 19:48:55,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-22 19:48:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-08-22 19:48:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 19:48:55,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:55,137 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:55,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 19:48:55,137 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:55,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1904204802, now seen corresponding path program 59 times [2020-08-22 19:48:55,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:55,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381366432] [2020-08-22 19:48:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:55,141 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:57,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:57,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381366432] [2020-08-22 19:48:57,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:57,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-08-22 19:48:57,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967995039] [2020-08-22 19:48:57,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-08-22 19:48:57,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:57,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-08-22 19:48:57,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-08-22 19:48:57,774 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 62 states. [2020-08-22 19:49:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:02,223 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2020-08-22 19:49:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-08-22 19:49:02,224 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 128 [2020-08-22 19:49:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:02,225 INFO L225 Difference]: With dead ends: 137 [2020-08-22 19:49:02,225 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 19:49:02,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-08-22 19:49:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 19:49:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-08-22 19:49:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 19:49:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-08-22 19:49:02,234 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-08-22 19:49:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:02,234 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-08-22 19:49:02,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-08-22 19:49:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-08-22 19:49:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-22 19:49:02,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:02,235 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:02,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 19:49:02,236 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:02,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1450583553, now seen corresponding path program 60 times [2020-08-22 19:49:02,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:02,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046286890] [2020-08-22 19:49:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:02,239 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:04,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:04,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046286890] [2020-08-22 19:49:04,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:04,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-08-22 19:49:04,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963118831] [2020-08-22 19:49:04,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-08-22 19:49:04,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:04,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-08-22 19:49:04,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 19:49:04,988 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 63 states. [2020-08-22 19:49:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:09,496 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2020-08-22 19:49:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-08-22 19:49:09,497 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 130 [2020-08-22 19:49:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:09,499 INFO L225 Difference]: With dead ends: 139 [2020-08-22 19:49:09,499 INFO L226 Difference]: Without dead ends: 134 [2020-08-22 19:49:09,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 19:49:09,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-22 19:49:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-08-22 19:49:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-22 19:49:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-08-22 19:49:09,505 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-08-22 19:49:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:09,505 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-08-22 19:49:09,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-08-22 19:49:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-08-22 19:49:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-22 19:49:09,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:09,506 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:09,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 19:49:09,507 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:09,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:09,507 INFO L82 PathProgramCache]: Analyzing trace with hash -687739840, now seen corresponding path program 61 times [2020-08-22 19:49:09,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:09,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711439972] [2020-08-22 19:49:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:09,519 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:12,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:12,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711439972] [2020-08-22 19:49:12,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:12,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-08-22 19:49:12,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402870782] [2020-08-22 19:49:12,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-08-22 19:49:12,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:12,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-08-22 19:49:12,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 19:49:12,343 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 64 states. [2020-08-22 19:49:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:17,111 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-08-22 19:49:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-08-22 19:49:17,112 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 132 [2020-08-22 19:49:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:17,114 INFO L225 Difference]: With dead ends: 141 [2020-08-22 19:49:17,114 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 19:49:17,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 19:49:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 19:49:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-08-22 19:49:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-22 19:49:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-08-22 19:49:17,120 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-08-22 19:49:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:17,120 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-08-22 19:49:17,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-08-22 19:49:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-08-22 19:49:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-22 19:49:17,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:17,122 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:17,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 19:49:17,122 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1672814271, now seen corresponding path program 62 times [2020-08-22 19:49:17,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:17,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508347312] [2020-08-22 19:49:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:17,133 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:20,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:20,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508347312] [2020-08-22 19:49:20,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:20,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-08-22 19:49:20,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330018703] [2020-08-22 19:49:20,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-08-22 19:49:20,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-08-22 19:49:20,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 19:49:20,067 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 65 states. [2020-08-22 19:49:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:25,052 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2020-08-22 19:49:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-08-22 19:49:25,053 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 134 [2020-08-22 19:49:25,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:25,054 INFO L225 Difference]: With dead ends: 143 [2020-08-22 19:49:25,054 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 19:49:25,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 19:49:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 19:49:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-08-22 19:49:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 19:49:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-08-22 19:49:25,061 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-08-22 19:49:25,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:25,062 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-08-22 19:49:25,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-08-22 19:49:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-08-22 19:49:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 19:49:25,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:25,063 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:25,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-08-22 19:49:25,063 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1872384642, now seen corresponding path program 63 times [2020-08-22 19:49:25,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:25,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666399383] [2020-08-22 19:49:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:25,075 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:28,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:28,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666399383] [2020-08-22 19:49:28,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:28,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-08-22 19:49:28,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855900501] [2020-08-22 19:49:28,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-08-22 19:49:28,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:28,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-08-22 19:49:28,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 19:49:28,088 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 66 states. [2020-08-22 19:49:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:33,151 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2020-08-22 19:49:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-08-22 19:49:33,152 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 136 [2020-08-22 19:49:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:33,155 INFO L225 Difference]: With dead ends: 145 [2020-08-22 19:49:33,155 INFO L226 Difference]: Without dead ends: 140 [2020-08-22 19:49:33,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 19:49:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-22 19:49:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-08-22 19:49:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-08-22 19:49:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-08-22 19:49:33,162 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-08-22 19:49:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:33,162 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-08-22 19:49:33,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-08-22 19:49:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-08-22 19:49:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 19:49:33,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:33,163 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:33,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-08-22 19:49:33,164 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:33,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1395492989, now seen corresponding path program 64 times [2020-08-22 19:49:33,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:33,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019472339] [2020-08-22 19:49:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:33,173 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:36,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:36,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019472339] [2020-08-22 19:49:36,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:36,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-08-22 19:49:36,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996489541] [2020-08-22 19:49:36,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-08-22 19:49:36,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:36,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-08-22 19:49:36,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 19:49:36,317 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 67 states. [2020-08-22 19:49:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:41,696 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2020-08-22 19:49:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-08-22 19:49:41,697 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 138 [2020-08-22 19:49:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:41,698 INFO L225 Difference]: With dead ends: 147 [2020-08-22 19:49:41,698 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 19:49:41,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 19:49:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 19:49:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-08-22 19:49:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-22 19:49:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-08-22 19:49:41,706 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-08-22 19:49:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:41,707 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-08-22 19:49:41,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-08-22 19:49:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-08-22 19:49:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 19:49:41,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:41,708 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:41,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-08-22 19:49:41,708 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:41,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2090164292, now seen corresponding path program 65 times [2020-08-22 19:49:41,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:41,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176838336] [2020-08-22 19:49:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:41,717 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:44,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:44,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176838336] [2020-08-22 19:49:44,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:44,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-08-22 19:49:44,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117677081] [2020-08-22 19:49:44,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-08-22 19:49:44,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-08-22 19:49:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4358, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 19:49:44,974 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 68 states. [2020-08-22 19:49:50,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:50,476 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2020-08-22 19:49:50,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-08-22 19:49:50,486 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 140 [2020-08-22 19:49:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:50,487 INFO L225 Difference]: With dead ends: 149 [2020-08-22 19:49:50,487 INFO L226 Difference]: Without dead ends: 144 [2020-08-22 19:49:50,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=198, Invalid=4358, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 19:49:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-22 19:49:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-08-22 19:49:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-22 19:49:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-08-22 19:49:50,494 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-08-22 19:49:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:50,494 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-08-22 19:49:50,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-08-22 19:49:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-08-22 19:49:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-22 19:49:50,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:50,495 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:50,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-08-22 19:49:50,496 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:50,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1732320453, now seen corresponding path program 66 times [2020-08-22 19:49:50,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:50,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645251506] [2020-08-22 19:49:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:50,504 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:53,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:53,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645251506] [2020-08-22 19:49:53,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:53,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-08-22 19:49:53,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168302808] [2020-08-22 19:49:53,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-08-22 19:49:53,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-08-22 19:49:53,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 19:49:53,886 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 69 states. [2020-08-22 19:49:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:59,510 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-08-22 19:49:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-08-22 19:49:59,511 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 142 [2020-08-22 19:49:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:59,512 INFO L225 Difference]: With dead ends: 151 [2020-08-22 19:49:59,512 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 19:49:59,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 19:49:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 19:49:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-08-22 19:49:59,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-08-22 19:49:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-08-22 19:49:59,517 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-08-22 19:49:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:59,517 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-08-22 19:49:59,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-08-22 19:49:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-08-22 19:49:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-08-22 19:49:59,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:59,519 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:59,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-08-22 19:49:59,519 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1441774854, now seen corresponding path program 67 times [2020-08-22 19:49:59,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:59,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737186104] [2020-08-22 19:49:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:59,529 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:03,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:03,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737186104] [2020-08-22 19:50:03,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:03,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-08-22 19:50:03,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029289897] [2020-08-22 19:50:03,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-08-22 19:50:03,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:03,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-08-22 19:50:03,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=4626, Unknown=0, NotChecked=0, Total=4830 [2020-08-22 19:50:03,042 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 70 states. [2020-08-22 19:50:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:08,713 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2020-08-22 19:50:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-08-22 19:50:08,718 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 144 [2020-08-22 19:50:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:08,720 INFO L225 Difference]: With dead ends: 153 [2020-08-22 19:50:08,720 INFO L226 Difference]: Without dead ends: 148 [2020-08-22 19:50:08,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=204, Invalid=4626, Unknown=0, NotChecked=0, Total=4830 [2020-08-22 19:50:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-22 19:50:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-08-22 19:50:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-22 19:50:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-08-22 19:50:08,726 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-08-22 19:50:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:08,726 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-08-22 19:50:08,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-08-22 19:50:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-08-22 19:50:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 19:50:08,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:08,727 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:08,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-08-22 19:50:08,728 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:08,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1400328455, now seen corresponding path program 68 times [2020-08-22 19:50:08,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:08,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787084847] [2020-08-22 19:50:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:08,736 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:12,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787084847] [2020-08-22 19:50:12,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:12,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-08-22 19:50:12,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437823107] [2020-08-22 19:50:12,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-08-22 19:50:12,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-08-22 19:50:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 19:50:12,326 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 71 states. [2020-08-22 19:50:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:17,885 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2020-08-22 19:50:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-08-22 19:50:17,886 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 146 [2020-08-22 19:50:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:17,887 INFO L225 Difference]: With dead ends: 155 [2020-08-22 19:50:17,888 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 19:50:17,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 19:50:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 19:50:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-08-22 19:50:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 19:50:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-08-22 19:50:17,895 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-08-22 19:50:17,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:17,895 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-08-22 19:50:17,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-08-22 19:50:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-08-22 19:50:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 19:50:17,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:17,896 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:17,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-08-22 19:50:17,897 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:17,897 INFO L82 PathProgramCache]: Analyzing trace with hash -225044680, now seen corresponding path program 69 times [2020-08-22 19:50:17,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:17,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779247110] [2020-08-22 19:50:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:17,908 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:21,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:21,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779247110] [2020-08-22 19:50:21,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:21,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-08-22 19:50:21,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905109420] [2020-08-22 19:50:21,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-08-22 19:50:21,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-08-22 19:50:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=4902, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 19:50:21,598 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 72 states. [2020-08-22 19:50:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:27,232 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2020-08-22 19:50:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-08-22 19:50:27,232 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 148 [2020-08-22 19:50:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:27,233 INFO L225 Difference]: With dead ends: 157 [2020-08-22 19:50:27,233 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 19:50:27,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=210, Invalid=4902, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 19:50:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 19:50:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-08-22 19:50:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-08-22 19:50:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-08-22 19:50:27,240 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-08-22 19:50:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:27,240 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-08-22 19:50:27,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-08-22 19:50:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-08-22 19:50:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 19:50:27,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:27,242 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:27,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-08-22 19:50:27,242 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:27,242 INFO L82 PathProgramCache]: Analyzing trace with hash -353735753, now seen corresponding path program 70 times [2020-08-22 19:50:27,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:27,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009991367] [2020-08-22 19:50:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:27,252 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:31,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:31,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009991367] [2020-08-22 19:50:31,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:31,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-08-22 19:50:31,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418626700] [2020-08-22 19:50:31,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-08-22 19:50:31,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:31,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-08-22 19:50:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 19:50:31,217 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 73 states. [2020-08-22 19:50:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:36,997 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2020-08-22 19:50:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-08-22 19:50:36,997 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 150 [2020-08-22 19:50:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:36,999 INFO L225 Difference]: With dead ends: 159 [2020-08-22 19:50:36,999 INFO L226 Difference]: Without dead ends: 154 [2020-08-22 19:50:36,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 19:50:37,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-22 19:50:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-08-22 19:50:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-22 19:50:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-08-22 19:50:37,006 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-08-22 19:50:37,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:37,006 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-08-22 19:50:37,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-08-22 19:50:37,006 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-08-22 19:50:37,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 19:50:37,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:37,007 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:37,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-08-22 19:50:37,007 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:37,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:37,008 INFO L82 PathProgramCache]: Analyzing trace with hash 528194678, now seen corresponding path program 71 times [2020-08-22 19:50:37,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:37,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759117643] [2020-08-22 19:50:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:37,018 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:40,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:40,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759117643] [2020-08-22 19:50:40,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:40,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-08-22 19:50:40,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272903515] [2020-08-22 19:50:40,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-08-22 19:50:40,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:40,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-08-22 19:50:40,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5186, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 19:50:40,950 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 74 states. [2020-08-22 19:50:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:46,703 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-08-22 19:50:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-08-22 19:50:46,704 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 152 [2020-08-22 19:50:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:46,705 INFO L225 Difference]: With dead ends: 161 [2020-08-22 19:50:46,705 INFO L226 Difference]: Without dead ends: 156 [2020-08-22 19:50:46,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=216, Invalid=5186, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 19:50:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-22 19:50:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-08-22 19:50:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 19:50:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-08-22 19:50:46,709 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-08-22 19:50:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:46,710 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-08-22 19:50:46,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-08-22 19:50:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-08-22 19:50:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-22 19:50:46,710 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:46,711 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:46,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-08-22 19:50:46,711 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:46,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1954781557, now seen corresponding path program 72 times [2020-08-22 19:50:46,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:46,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950956401] [2020-08-22 19:50:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:46,715 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:50,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:50,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950956401] [2020-08-22 19:50:50,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:50,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-08-22 19:50:50,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643572440] [2020-08-22 19:50:50,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-08-22 19:50:50,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:50,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-08-22 19:50:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 19:50:50,778 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 75 states. [2020-08-22 19:50:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:56,697 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-08-22 19:50:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-08-22 19:50:56,697 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 154 [2020-08-22 19:50:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:56,699 INFO L225 Difference]: With dead ends: 163 [2020-08-22 19:50:56,699 INFO L226 Difference]: Without dead ends: 158 [2020-08-22 19:50:56,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 19:50:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-08-22 19:50:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-08-22 19:50:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 19:50:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-08-22 19:50:56,704 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-08-22 19:50:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:56,704 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-08-22 19:50:56,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-08-22 19:50:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-08-22 19:50:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 19:50:56,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:56,705 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:56,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-08-22 19:50:56,706 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:56,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1484762444, now seen corresponding path program 73 times [2020-08-22 19:50:56,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:56,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478997626] [2020-08-22 19:50:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:56,708 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:00,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:00,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478997626] [2020-08-22 19:51:00,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:00,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-08-22 19:51:00,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053853252] [2020-08-22 19:51:00,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-08-22 19:51:00,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:00,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-08-22 19:51:00,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=5478, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 19:51:00,893 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 76 states. [2020-08-22 19:51:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:06,829 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2020-08-22 19:51:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-08-22 19:51:06,830 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 156 [2020-08-22 19:51:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:06,831 INFO L225 Difference]: With dead ends: 165 [2020-08-22 19:51:06,831 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 19:51:06,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=222, Invalid=5478, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 19:51:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 19:51:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-08-22 19:51:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-08-22 19:51:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-08-22 19:51:06,838 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-08-22 19:51:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:06,838 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-08-22 19:51:06,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-08-22 19:51:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-08-22 19:51:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 19:51:06,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:06,840 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:51:06,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-08-22 19:51:06,840 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash 238270515, now seen corresponding path program 74 times [2020-08-22 19:51:06,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:06,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829450243] [2020-08-22 19:51:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:06,848 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:11,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:11,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829450243] [2020-08-22 19:51:11,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:11,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-08-22 19:51:11,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544629717] [2020-08-22 19:51:11,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-08-22 19:51:11,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:11,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-08-22 19:51:11,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 19:51:11,134 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 77 states. [2020-08-22 19:51:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:17,159 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2020-08-22 19:51:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-08-22 19:51:17,159 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 158 [2020-08-22 19:51:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:17,161 INFO L225 Difference]: With dead ends: 167 [2020-08-22 19:51:17,161 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 19:51:17,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 19:51:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 19:51:17,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-08-22 19:51:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 19:51:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-08-22 19:51:17,167 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-08-22 19:51:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:17,167 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-08-22 19:51:17,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-08-22 19:51:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-08-22 19:51:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-08-22 19:51:17,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:17,169 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:51:17,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-08-22 19:51:17,169 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:17,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1784432142, now seen corresponding path program 75 times [2020-08-22 19:51:17,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:17,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492874996] [2020-08-22 19:51:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:17,179 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:21,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:21,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492874996] [2020-08-22 19:51:21,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:21,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-08-22 19:51:21,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124926258] [2020-08-22 19:51:21,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-08-22 19:51:21,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:21,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-08-22 19:51:21,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5778, Unknown=0, NotChecked=0, Total=6006 [2020-08-22 19:51:21,647 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 78 states. [2020-08-22 19:51:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:27,792 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2020-08-22 19:51:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-08-22 19:51:27,793 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 160 [2020-08-22 19:51:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:27,794 INFO L225 Difference]: With dead ends: 169 [2020-08-22 19:51:27,794 INFO L226 Difference]: Without dead ends: 164 [2020-08-22 19:51:27,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=228, Invalid=5778, Unknown=0, NotChecked=0, Total=6006 [2020-08-22 19:51:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-08-22 19:51:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-08-22 19:51:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-08-22 19:51:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-08-22 19:51:27,801 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-08-22 19:51:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:27,802 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-08-22 19:51:27,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-08-22 19:51:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-08-22 19:51:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-22 19:51:27,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:27,803 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:51:27,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-08-22 19:51:27,803 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash 18499569, now seen corresponding path program 76 times [2020-08-22 19:51:27,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:27,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203847377] [2020-08-22 19:51:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:27,810 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:32,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:32,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203847377] [2020-08-22 19:51:32,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:32,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-08-22 19:51:32,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612683700] [2020-08-22 19:51:32,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-08-22 19:51:32,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:32,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-08-22 19:51:32,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 19:51:32,372 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 79 states. [2020-08-22 19:51:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:38,901 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-08-22 19:51:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-08-22 19:51:38,902 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 162 [2020-08-22 19:51:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:38,903 INFO L225 Difference]: With dead ends: 171 [2020-08-22 19:51:38,903 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 19:51:38,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 19:51:38,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 19:51:38,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-08-22 19:51:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-08-22 19:51:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-08-22 19:51:38,909 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-08-22 19:51:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:38,909 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-08-22 19:51:38,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-08-22 19:51:38,909 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-08-22 19:51:38,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-08-22 19:51:38,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:38,910 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:51:38,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-08-22 19:51:38,910 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:38,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1764053552, now seen corresponding path program 77 times [2020-08-22 19:51:38,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:38,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593410691] [2020-08-22 19:51:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:38,920 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:43,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:43,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593410691] [2020-08-22 19:51:43,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:43,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-08-22 19:51:43,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679155767] [2020-08-22 19:51:43,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-08-22 19:51:43,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-08-22 19:51:43,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=6086, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 19:51:43,676 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 80 states. [2020-08-22 19:51:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:50,436 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2020-08-22 19:51:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-08-22 19:51:50,437 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 164 [2020-08-22 19:51:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:50,439 INFO L225 Difference]: With dead ends: 173 [2020-08-22 19:51:50,439 INFO L226 Difference]: Without dead ends: 168 [2020-08-22 19:51:50,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=234, Invalid=6086, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 19:51:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-22 19:51:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-08-22 19:51:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 19:51:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-08-22 19:51:50,444 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-08-22 19:51:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:50,444 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-08-22 19:51:50,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-08-22 19:51:50,445 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-08-22 19:51:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 19:51:50,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:50,445 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:51:50,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-08-22 19:51:50,446 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash -90781521, now seen corresponding path program 78 times [2020-08-22 19:51:50,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:50,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066289635] [2020-08-22 19:51:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:50,449 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:55,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:55,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066289635] [2020-08-22 19:51:55,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:55,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-08-22 19:51:55,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481269314] [2020-08-22 19:51:55,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-08-22 19:51:55,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:55,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-08-22 19:51:55,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 19:51:55,383 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 81 states. [2020-08-22 19:52:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:02,353 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2020-08-22 19:52:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-08-22 19:52:02,354 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 166 [2020-08-22 19:52:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:02,356 INFO L225 Difference]: With dead ends: 175 [2020-08-22 19:52:02,356 INFO L226 Difference]: Without dead ends: 170 [2020-08-22 19:52:02,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 19:52:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-08-22 19:52:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-08-22 19:52:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-08-22 19:52:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-08-22 19:52:02,363 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-08-22 19:52:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:02,363 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-08-22 19:52:02,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-08-22 19:52:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-08-22 19:52:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 19:52:02,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:02,364 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:52:02,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-08-22 19:52:02,365 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash -175858834, now seen corresponding path program 79 times [2020-08-22 19:52:02,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:02,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129717027] [2020-08-22 19:52:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:02,373 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:07,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:07,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129717027] [2020-08-22 19:52:07,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:07,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-08-22 19:52:07,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801774573] [2020-08-22 19:52:07,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-08-22 19:52:07,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:07,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-08-22 19:52:07,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=6402, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 19:52:07,413 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 82 states. [2020-08-22 19:52:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:14,491 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2020-08-22 19:52:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-08-22 19:52:14,491 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 168 [2020-08-22 19:52:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:14,493 INFO L225 Difference]: With dead ends: 177 [2020-08-22 19:52:14,493 INFO L226 Difference]: Without dead ends: 172 [2020-08-22 19:52:14,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=240, Invalid=6402, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 19:52:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-08-22 19:52:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-08-22 19:52:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-08-22 19:52:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-08-22 19:52:14,499 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-08-22 19:52:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:14,500 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-08-22 19:52:14,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-08-22 19:52:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-08-22 19:52:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-08-22 19:52:14,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:14,501 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:52:14,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-08-22 19:52:14,501 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:14,502 INFO L82 PathProgramCache]: Analyzing trace with hash -330778003, now seen corresponding path program 80 times [2020-08-22 19:52:14,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:14,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437280734] [2020-08-22 19:52:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:14,513 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:19,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:19,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437280734] [2020-08-22 19:52:19,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:19,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-08-22 19:52:19,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82818253] [2020-08-22 19:52:19,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-08-22 19:52:19,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-08-22 19:52:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 19:52:19,677 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 83 states. [2020-08-22 19:52:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:27,140 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2020-08-22 19:52:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-08-22 19:52:27,141 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 170 [2020-08-22 19:52:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:27,142 INFO L225 Difference]: With dead ends: 179 [2020-08-22 19:52:27,142 INFO L226 Difference]: Without dead ends: 174 [2020-08-22 19:52:27,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 19:52:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-22 19:52:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-08-22 19:52:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 19:52:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-08-22 19:52:27,149 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-08-22 19:52:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:27,150 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-08-22 19:52:27,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-08-22 19:52:27,150 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-08-22 19:52:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-08-22 19:52:27,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:27,151 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:52:27,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-08-22 19:52:27,151 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1115755948, now seen corresponding path program 81 times [2020-08-22 19:52:27,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:27,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50274497] [2020-08-22 19:52:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:27,161 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:32,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50274497] [2020-08-22 19:52:32,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:32,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-08-22 19:52:32,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774891374] [2020-08-22 19:52:32,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-08-22 19:52:32,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-08-22 19:52:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=6726, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 19:52:32,503 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 84 states. [2020-08-22 19:52:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:39,923 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-08-22 19:52:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-08-22 19:52:39,924 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 172 [2020-08-22 19:52:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:39,926 INFO L225 Difference]: With dead ends: 181 [2020-08-22 19:52:39,926 INFO L226 Difference]: Without dead ends: 176 [2020-08-22 19:52:39,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=246, Invalid=6726, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 19:52:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-08-22 19:52:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-08-22 19:52:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-08-22 19:52:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-08-22 19:52:39,934 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-08-22 19:52:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:39,934 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-08-22 19:52:39,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-08-22 19:52:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-08-22 19:52:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-08-22 19:52:39,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:39,936 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:52:39,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-08-22 19:52:39,936 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:39,936 INFO L82 PathProgramCache]: Analyzing trace with hash -334521045, now seen corresponding path program 82 times [2020-08-22 19:52:39,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:39,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317826724] [2020-08-22 19:52:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:39,945 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:45,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:45,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317826724] [2020-08-22 19:52:45,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:45,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-08-22 19:52:45,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999518398] [2020-08-22 19:52:45,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-08-22 19:52:45,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:45,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-08-22 19:52:45,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 19:52:45,466 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 85 states. [2020-08-22 19:52:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:53,033 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2020-08-22 19:52:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-08-22 19:52:53,034 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 174 [2020-08-22 19:52:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:53,035 INFO L225 Difference]: With dead ends: 183 [2020-08-22 19:52:53,035 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 19:52:53,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 19:52:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 19:52:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-08-22 19:52:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 19:52:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-08-22 19:52:53,042 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-08-22 19:52:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:53,042 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-08-22 19:52:53,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-08-22 19:52:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-08-22 19:52:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 19:52:53,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:53,043 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:52:53,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-08-22 19:52:53,043 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1813659882, now seen corresponding path program 83 times [2020-08-22 19:52:53,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:53,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336443567] [2020-08-22 19:52:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:53,048 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:58,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:58,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336443567] [2020-08-22 19:52:58,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:58,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-08-22 19:52:58,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9574486] [2020-08-22 19:52:58,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-08-22 19:52:58,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:58,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-08-22 19:52:58,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=7058, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 19:52:58,750 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 86 states. [2020-08-22 19:53:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:06,678 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2020-08-22 19:53:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-08-22 19:53:06,680 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 176 [2020-08-22 19:53:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:06,681 INFO L225 Difference]: With dead ends: 185 [2020-08-22 19:53:06,681 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 19:53:06,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=252, Invalid=7058, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 19:53:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 19:53:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-08-22 19:53:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-22 19:53:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-08-22 19:53:06,688 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-08-22 19:53:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:06,688 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-08-22 19:53:06,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-08-22 19:53:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-08-22 19:53:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-22 19:53:06,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:06,689 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:53:06,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-08-22 19:53:06,690 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:06,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:06,690 INFO L82 PathProgramCache]: Analyzing trace with hash 336261353, now seen corresponding path program 84 times [2020-08-22 19:53:06,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:06,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128697537] [2020-08-22 19:53:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:06,694 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:12,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:12,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128697537] [2020-08-22 19:53:12,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:12,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-08-22 19:53:12,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158636535] [2020-08-22 19:53:12,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-08-22 19:53:12,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-08-22 19:53:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 19:53:12,547 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 87 states. [2020-08-22 19:53:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:20,823 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2020-08-22 19:53:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-08-22 19:53:20,824 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 178 [2020-08-22 19:53:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:20,826 INFO L225 Difference]: With dead ends: 187 [2020-08-22 19:53:20,826 INFO L226 Difference]: Without dead ends: 182 [2020-08-22 19:53:20,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 19:53:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-22 19:53:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-08-22 19:53:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-08-22 19:53:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-08-22 19:53:20,834 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2020-08-22 19:53:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:20,834 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-08-22 19:53:20,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-08-22 19:53:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-08-22 19:53:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 19:53:20,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:20,836 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:53:20,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-08-22 19:53:20,836 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2104517336, now seen corresponding path program 85 times [2020-08-22 19:53:20,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:20,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015031426] [2020-08-22 19:53:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:20,846 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:26,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:26,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015031426] [2020-08-22 19:53:26,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:26,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-08-22 19:53:26,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215163061] [2020-08-22 19:53:26,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-08-22 19:53:26,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:26,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-08-22 19:53:26,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=7398, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 19:53:26,989 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 88 states. [2020-08-22 19:53:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:35,584 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2020-08-22 19:53:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-08-22 19:53:35,585 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 180 [2020-08-22 19:53:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:35,586 INFO L225 Difference]: With dead ends: 189 [2020-08-22 19:53:35,586 INFO L226 Difference]: Without dead ends: 184 [2020-08-22 19:53:35,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=258, Invalid=7398, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 19:53:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-08-22 19:53:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-08-22 19:53:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-08-22 19:53:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-08-22 19:53:35,596 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2020-08-22 19:53:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:35,596 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-08-22 19:53:35,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-08-22 19:53:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-08-22 19:53:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-08-22 19:53:35,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:35,597 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:53:35,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-08-22 19:53:35,598 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:35,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1654273447, now seen corresponding path program 86 times [2020-08-22 19:53:35,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:35,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207815402] [2020-08-22 19:53:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:35,601 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:41,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:41,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207815402] [2020-08-22 19:53:41,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:41,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-08-22 19:53:41,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439230869] [2020-08-22 19:53:41,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-08-22 19:53:41,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-08-22 19:53:41,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 19:53:41,800 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 89 states. [2020-08-22 19:53:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:50,693 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-08-22 19:53:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-08-22 19:53:50,694 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 182 [2020-08-22 19:53:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:50,695 INFO L225 Difference]: With dead ends: 191 [2020-08-22 19:53:50,695 INFO L226 Difference]: Without dead ends: 186 [2020-08-22 19:53:50,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 19:53:50,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-22 19:53:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-08-22 19:53:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 19:53:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-08-22 19:53:50,703 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2020-08-22 19:53:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:50,703 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-08-22 19:53:50,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-08-22 19:53:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-08-22 19:53:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-08-22 19:53:50,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:50,704 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:53:50,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-08-22 19:53:50,704 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:50,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1784719974, now seen corresponding path program 87 times [2020-08-22 19:53:50,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:50,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067363869] [2020-08-22 19:53:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:50,709 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:57,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:57,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067363869] [2020-08-22 19:53:57,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:57,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-08-22 19:53:57,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388744401] [2020-08-22 19:53:57,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-08-22 19:53:57,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:57,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-08-22 19:53:57,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=7746, Unknown=0, NotChecked=0, Total=8010 [2020-08-22 19:53:57,226 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 90 states. [2020-08-22 19:54:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:54:06,457 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2020-08-22 19:54:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-08-22 19:54:06,458 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 184 [2020-08-22 19:54:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:54:06,459 INFO L225 Difference]: With dead ends: 193 [2020-08-22 19:54:06,459 INFO L226 Difference]: Without dead ends: 188 [2020-08-22 19:54:06,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=264, Invalid=7746, Unknown=0, NotChecked=0, Total=8010 [2020-08-22 19:54:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-22 19:54:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-08-22 19:54:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-08-22 19:54:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-08-22 19:54:06,466 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2020-08-22 19:54:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:54:06,467 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-08-22 19:54:06,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-08-22 19:54:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-08-22 19:54:06,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 19:54:06,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:54:06,468 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:54:06,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-08-22 19:54:06,468 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:54:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:54:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1705186459, now seen corresponding path program 88 times [2020-08-22 19:54:06,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:54:06,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962208595] [2020-08-22 19:54:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:54:06,478 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:54:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:12,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:54:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:54:13,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962208595] [2020-08-22 19:54:13,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:54:13,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2020-08-22 19:54:13,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55973128] [2020-08-22 19:54:13,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-08-22 19:54:13,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:54:13,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-08-22 19:54:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 19:54:13,009 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 91 states. [2020-08-22 19:54:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:54:22,387 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2020-08-22 19:54:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-08-22 19:54:22,388 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 186 [2020-08-22 19:54:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:54:22,389 INFO L225 Difference]: With dead ends: 195 [2020-08-22 19:54:22,389 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 19:54:22,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 19:54:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 19:54:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-08-22 19:54:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-08-22 19:54:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2020-08-22 19:54:22,395 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2020-08-22 19:54:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:54:22,395 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2020-08-22 19:54:22,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-08-22 19:54:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2020-08-22 19:54:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-08-22 19:54:22,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:54:22,396 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:54:22,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-08-22 19:54:22,396 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:54:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:54:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1135810396, now seen corresponding path program 89 times [2020-08-22 19:54:22,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:54:22,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940997974] [2020-08-22 19:54:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:54:22,400 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:54:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:29,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:54:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:54:29,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940997974] [2020-08-22 19:54:29,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:54:29,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-08-22 19:54:29,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378820435] [2020-08-22 19:54:29,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-08-22 19:54:29,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:54:29,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-08-22 19:54:29,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=8102, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 19:54:29,132 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 92 states. [2020-08-22 19:54:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:54:39,162 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2020-08-22 19:54:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-08-22 19:54:39,163 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 188 [2020-08-22 19:54:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:54:39,164 INFO L225 Difference]: With dead ends: 197 [2020-08-22 19:54:39,164 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 19:54:39,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=270, Invalid=8102, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 19:54:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 19:54:39,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-08-22 19:54:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-22 19:54:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2020-08-22 19:54:39,169 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2020-08-22 19:54:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:54:39,169 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2020-08-22 19:54:39,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-08-22 19:54:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2020-08-22 19:54:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-22 19:54:39,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:54:39,170 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:54:39,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-08-22 19:54:39,170 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:54:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:54:39,170 INFO L82 PathProgramCache]: Analyzing trace with hash 573739555, now seen corresponding path program 90 times [2020-08-22 19:54:39,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:54:39,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705116914] [2020-08-22 19:54:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:54:39,173 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:54:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:46,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:54:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:54:46,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705116914] [2020-08-22 19:54:46,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:54:46,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-08-22 19:54:46,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363250275] [2020-08-22 19:54:46,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-08-22 19:54:46,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:54:46,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-08-22 19:54:46,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 19:54:46,104 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 93 states. [2020-08-22 19:54:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:54:56,608 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2020-08-22 19:54:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-08-22 19:54:56,609 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 190 [2020-08-22 19:54:56,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:54:56,610 INFO L225 Difference]: With dead ends: 199 [2020-08-22 19:54:56,611 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 19:54:56,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 19:54:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 19:54:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-08-22 19:54:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-08-22 19:54:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2020-08-22 19:54:56,616 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2020-08-22 19:54:56,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:54:56,617 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2020-08-22 19:54:56,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-08-22 19:54:56,617 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2020-08-22 19:54:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-22 19:54:56,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:54:56,618 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:54:56,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-08-22 19:54:56,618 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:54:56,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:54:56,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1521231902, now seen corresponding path program 91 times [2020-08-22 19:54:56,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:54:56,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048447305] [2020-08-22 19:54:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:54:56,624 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:54:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:03,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:55:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:55:03,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048447305] [2020-08-22 19:55:03,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:55:03,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-08-22 19:55:03,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312828801] [2020-08-22 19:55:03,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-08-22 19:55:03,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:55:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-08-22 19:55:03,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=8466, Unknown=0, NotChecked=0, Total=8742 [2020-08-22 19:55:03,931 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 94 states. [2020-08-22 19:55:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:55:15,096 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2020-08-22 19:55:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-08-22 19:55:15,097 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 192 [2020-08-22 19:55:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:55:15,098 INFO L225 Difference]: With dead ends: 201 [2020-08-22 19:55:15,098 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 19:55:15,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=276, Invalid=8466, Unknown=0, NotChecked=0, Total=8742 [2020-08-22 19:55:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 19:55:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-08-22 19:55:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 19:55:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2020-08-22 19:55:15,104 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2020-08-22 19:55:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:55:15,104 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2020-08-22 19:55:15,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-08-22 19:55:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2020-08-22 19:55:15,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-08-22 19:55:15,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:55:15,105 INFO L422 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:55:15,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-08-22 19:55:15,105 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:55:15,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:55:15,106 INFO L82 PathProgramCache]: Analyzing trace with hash -449140255, now seen corresponding path program 92 times [2020-08-22 19:55:15,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:55:15,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480273297] [2020-08-22 19:55:15,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:55:15,113 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:55:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:22,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:55:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:55:22,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480273297] [2020-08-22 19:55:22,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:55:22,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2020-08-22 19:55:22,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205794894] [2020-08-22 19:55:22,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-08-22 19:55:22,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:55:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-08-22 19:55:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=8651, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 19:55:22,431 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 95 states. [2020-08-22 19:55:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:55:33,729 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2020-08-22 19:55:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-08-22 19:55:33,731 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 194 [2020-08-22 19:55:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:55:33,732 INFO L225 Difference]: With dead ends: 203 [2020-08-22 19:55:33,732 INFO L226 Difference]: Without dead ends: 198 [2020-08-22 19:55:33,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=279, Invalid=8651, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 19:55:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-22 19:55:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2020-08-22 19:55:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 19:55:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-08-22 19:55:33,741 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2020-08-22 19:55:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:55:33,742 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-08-22 19:55:33,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-08-22 19:55:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-08-22 19:55:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-08-22 19:55:33,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:55:33,744 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:55:33,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-08-22 19:55:33,744 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:55:33,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:55:33,744 INFO L82 PathProgramCache]: Analyzing trace with hash -961218528, now seen corresponding path program 93 times [2020-08-22 19:55:33,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:55:33,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580050095] [2020-08-22 19:55:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:55:33,754 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:55:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:41,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:55:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:55:41,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580050095] [2020-08-22 19:55:41,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:55:41,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-08-22 19:55:41,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935615962] [2020-08-22 19:55:41,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-08-22 19:55:41,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:55:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-08-22 19:55:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=8838, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 19:55:41,433 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 96 states. [2020-08-22 19:55:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:55:52,685 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2020-08-22 19:55:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-08-22 19:55:52,686 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 196 [2020-08-22 19:55:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:55:52,687 INFO L225 Difference]: With dead ends: 205 [2020-08-22 19:55:52,687 INFO L226 Difference]: Without dead ends: 200 [2020-08-22 19:55:52,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=282, Invalid=8838, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 19:55:52,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-22 19:55:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-08-22 19:55:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-22 19:55:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2020-08-22 19:55:52,693 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2020-08-22 19:55:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:55:52,693 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2020-08-22 19:55:52,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-08-22 19:55:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2020-08-22 19:55:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-08-22 19:55:52,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:55:52,694 INFO L422 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:55:52,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-08-22 19:55:52,694 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:55:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:55:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash 852800159, now seen corresponding path program 94 times [2020-08-22 19:55:52,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:55:52,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695939900] [2020-08-22 19:55:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:55:52,698 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:55:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:00,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:56:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:56:00,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695939900] [2020-08-22 19:56:00,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:56:00,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2020-08-22 19:56:00,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651674218] [2020-08-22 19:56:00,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-08-22 19:56:00,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:56:00,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-08-22 19:56:00,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=9027, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 19:56:00,393 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 97 states. [2020-08-22 19:56:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:56:12,172 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2020-08-22 19:56:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-08-22 19:56:12,176 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 198 [2020-08-22 19:56:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:56:12,176 INFO L225 Difference]: With dead ends: 207 [2020-08-22 19:56:12,177 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 19:56:12,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=285, Invalid=9027, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 19:56:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 19:56:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2020-08-22 19:56:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-08-22 19:56:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2020-08-22 19:56:12,182 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2020-08-22 19:56:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:56:12,182 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2020-08-22 19:56:12,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-08-22 19:56:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2020-08-22 19:56:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 19:56:12,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:56:12,183 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:56:12,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-08-22 19:56:12,184 INFO L427 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:56:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:56:12,184 INFO L82 PathProgramCache]: Analyzing trace with hash 368036190, now seen corresponding path program 95 times [2020-08-22 19:56:12,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:56:12,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299822918] [2020-08-22 19:56:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:56:12,187 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:56:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:56:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:56:20,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299822918] [2020-08-22 19:56:20,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:56:20,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-08-22 19:56:20,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653068862] [2020-08-22 19:56:20,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-08-22 19:56:20,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:56:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-08-22 19:56:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=9218, Unknown=0, NotChecked=0, Total=9506 [2020-08-22 19:56:20,222 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 98 states. [2020-08-22 19:56:32,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:56:32,976 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2020-08-22 19:56:32,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-08-22 19:56:32,977 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 200 [2020-08-22 19:56:32,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:56:32,978 INFO L225 Difference]: With dead ends: 209 [2020-08-22 19:56:32,978 INFO L226 Difference]: Without dead ends: 204 [2020-08-22 19:56:32,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=288, Invalid=9218, Unknown=0, NotChecked=0, Total=9506 [2020-08-22 19:56:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-08-22 19:56:32,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2020-08-22 19:56:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-22 19:56:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-08-22 19:56:32,985 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2020-08-22 19:56:32,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:56:32,985 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-08-22 19:56:32,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-08-22 19:56:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-08-22 19:56:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-08-22 19:56:32,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:56:32,986 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:56:32,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-08-22 19:56:32,986 INFO L427 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:56:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:56:32,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1633670051, now seen corresponding path program 96 times [2020-08-22 19:56:32,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:56:32,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593892785] [2020-08-22 19:56:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:56:32,991 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:56:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:41,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:56:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:56:41,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593892785] [2020-08-22 19:56:41,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:56:41,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-08-22 19:56:41,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100213956] [2020-08-22 19:56:41,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-08-22 19:56:41,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:56:41,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-08-22 19:56:41,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=9411, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 19:56:41,210 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 99 states. [2020-08-22 19:56:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:56:54,881 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-08-22 19:56:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-08-22 19:56:54,882 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 202 [2020-08-22 19:56:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:56:54,883 INFO L225 Difference]: With dead ends: 211 [2020-08-22 19:56:54,883 INFO L226 Difference]: Without dead ends: 206 [2020-08-22 19:56:54,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=291, Invalid=9411, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 19:56:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-22 19:56:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2020-08-22 19:56:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-08-22 19:56:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2020-08-22 19:56:54,889 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2020-08-22 19:56:54,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:56:54,889 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2020-08-22 19:56:54,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-08-22 19:56:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2020-08-22 19:56:54,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-08-22 19:56:54,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:56:54,890 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:56:54,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-08-22 19:56:54,891 INFO L427 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:56:54,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:56:54,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1128019044, now seen corresponding path program 97 times [2020-08-22 19:56:54,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:56:54,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539701130] [2020-08-22 19:56:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:56:54,896 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:56:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:03,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:57:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:57:03,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539701130] [2020-08-22 19:57:03,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:57:03,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-08-22 19:57:03,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720325224] [2020-08-22 19:57:03,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-08-22 19:57:03,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:57:03,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-08-22 19:57:03,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=9606, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 19:57:03,501 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 100 states. [2020-08-22 19:57:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:57:17,719 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2020-08-22 19:57:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-08-22 19:57:17,721 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 204 [2020-08-22 19:57:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:57:17,722 INFO L225 Difference]: With dead ends: 213 [2020-08-22 19:57:17,722 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 19:57:17,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=294, Invalid=9606, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 19:57:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 19:57:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-08-22 19:57:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-08-22 19:57:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-08-22 19:57:17,727 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2020-08-22 19:57:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:57:17,727 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-08-22 19:57:17,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-08-22 19:57:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-08-22 19:57:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-22 19:57:17,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:57:17,728 INFO L422 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:57:17,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-08-22 19:57:17,728 INFO L427 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:57:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:57:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash -528705765, now seen corresponding path program 98 times [2020-08-22 19:57:17,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:57:17,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744043039] [2020-08-22 19:57:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:57:17,732 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:57:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:26,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:57:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:57:26,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744043039] [2020-08-22 19:57:26,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:57:26,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2020-08-22 19:57:26,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637902276] [2020-08-22 19:57:26,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-08-22 19:57:26,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:57:26,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-08-22 19:57:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=9803, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 19:57:26,605 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 101 states. [2020-08-22 19:57:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:57:40,645 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2020-08-22 19:57:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-08-22 19:57:40,647 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 206 [2020-08-22 19:57:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:57:40,648 INFO L225 Difference]: With dead ends: 215 [2020-08-22 19:57:40,648 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 19:57:40,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=297, Invalid=9803, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 19:57:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 19:57:40,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-08-22 19:57:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-22 19:57:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2020-08-22 19:57:40,655 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2020-08-22 19:57:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:57:40,655 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2020-08-22 19:57:40,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-08-22 19:57:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2020-08-22 19:57:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-08-22 19:57:40,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:57:40,656 INFO L422 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:57:40,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-08-22 19:57:40,656 INFO L427 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:57:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:57:40,656 INFO L82 PathProgramCache]: Analyzing trace with hash -114262310, now seen corresponding path program 99 times [2020-08-22 19:57:40,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:57:40,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372853325] [2020-08-22 19:57:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:57:40,660 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:57:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:49,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:57:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:57:49,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372853325] [2020-08-22 19:57:49,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:57:49,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-08-22 19:57:49,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506530782] [2020-08-22 19:57:49,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-08-22 19:57:49,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:57:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-08-22 19:57:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=10002, Unknown=0, NotChecked=0, Total=10302 [2020-08-22 19:57:49,574 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 102 states. [2020-08-22 19:58:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:58:04,116 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2020-08-22 19:58:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-08-22 19:58:04,117 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 208 [2020-08-22 19:58:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:58:04,119 INFO L225 Difference]: With dead ends: 217 [2020-08-22 19:58:04,119 INFO L226 Difference]: Without dead ends: 212 [2020-08-22 19:58:04,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=300, Invalid=10002, Unknown=0, NotChecked=0, Total=10302 [2020-08-22 19:58:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-08-22 19:58:04,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2020-08-22 19:58:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-22 19:58:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2020-08-22 19:58:04,126 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2020-08-22 19:58:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:58:04,127 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2020-08-22 19:58:04,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-08-22 19:58:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2020-08-22 19:58:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 19:58:04,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:58:04,128 INFO L422 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:58:04,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-08-22 19:58:04,128 INFO L427 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:58:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:58:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1266060583, now seen corresponding path program 100 times [2020-08-22 19:58:04,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:58:04,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529302474] [2020-08-22 19:58:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:58:04,142 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:58:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:13,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:58:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:58:13,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529302474] [2020-08-22 19:58:13,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:58:13,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2020-08-22 19:58:13,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511477883] [2020-08-22 19:58:13,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-08-22 19:58:13,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:58:13,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-08-22 19:58:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=10203, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 19:58:13,301 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 103 states. [2020-08-22 19:58:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:58:28,485 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2020-08-22 19:58:28,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-08-22 19:58:28,487 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 210 [2020-08-22 19:58:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:58:28,488 INFO L225 Difference]: With dead ends: 219 [2020-08-22 19:58:28,489 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 19:58:28,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=303, Invalid=10203, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 19:58:28,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 19:58:28,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2020-08-22 19:58:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-22 19:58:28,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2020-08-22 19:58:28,495 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2020-08-22 19:58:28,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:58:28,496 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2020-08-22 19:58:28,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-08-22 19:58:28,496 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2020-08-22 19:58:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-08-22 19:58:28,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:58:28,497 INFO L422 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:58:28,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2020-08-22 19:58:28,497 INFO L427 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:58:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:58:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash -42638568, now seen corresponding path program 101 times [2020-08-22 19:58:28,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:58:28,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784243221] [2020-08-22 19:58:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:58:28,507 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:58:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:37,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:58:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:58:37,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784243221] [2020-08-22 19:58:37,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:58:37,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2020-08-22 19:58:37,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731617671] [2020-08-22 19:58:37,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-08-22 19:58:37,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:58:37,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-08-22 19:58:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=10406, Unknown=0, NotChecked=0, Total=10712 [2020-08-22 19:58:37,909 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 104 states. [2020-08-22 19:58:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:58:53,423 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2020-08-22 19:58:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-08-22 19:58:53,425 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 212 [2020-08-22 19:58:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:58:53,426 INFO L225 Difference]: With dead ends: 221 [2020-08-22 19:58:53,426 INFO L226 Difference]: Without dead ends: 216 [2020-08-22 19:58:53,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=306, Invalid=10406, Unknown=0, NotChecked=0, Total=10712 [2020-08-22 19:58:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-22 19:58:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2020-08-22 19:58:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-22 19:58:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2020-08-22 19:58:53,433 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2020-08-22 19:58:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:58:53,433 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2020-08-22 19:58:53,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-08-22 19:58:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2020-08-22 19:58:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-22 19:58:53,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:58:53,435 INFO L422 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:58:53,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-08-22 19:58:53,435 INFO L427 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:58:53,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:58:53,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1155121257, now seen corresponding path program 102 times [2020-08-22 19:58:53,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:58:53,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596075122] [2020-08-22 19:58:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:58:53,445 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:58:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:03,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:59:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:59:03,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596075122] [2020-08-22 19:59:03,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:59:03,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2020-08-22 19:59:03,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96563755] [2020-08-22 19:59:03,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-08-22 19:59:03,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:59:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-08-22 19:59:03,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=10611, Unknown=0, NotChecked=0, Total=10920 [2020-08-22 19:59:03,139 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 105 states.