/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:52:45,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:52:45,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:52:45,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-19 02:52:46,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:52:46,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:52:46,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:52:46,031 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 02:52:46,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:52:46,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:52:46,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:52:46,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:52:46,068 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:52:46,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:52:46,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:52:46,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:52:46,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:52:46,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:52:46,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:52:46,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:52:46,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:52:46,072 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:52:46,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:52:46,072 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:52:46,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:52:46,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:52:46,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:52:46,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:52:46,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:52:46,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:52:46,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:52:46,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:52:46,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:52:46,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:52:46,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:52:46,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:52:46,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:52:46,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:52:46,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:52:46,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:52:46,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:52:46,394 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:52:46,394 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:52:46,395 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-08-19 02:52:46,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b795fe504/4599ad1efcb3485998e8b9c5079f4d5d/FLAG6dd2d9fba [2020-08-19 02:52:46,888 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:52:46,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-08-19 02:52:46,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b795fe504/4599ad1efcb3485998e8b9c5079f4d5d/FLAG6dd2d9fba [2020-08-19 02:52:47,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b795fe504/4599ad1efcb3485998e8b9c5079f4d5d [2020-08-19 02:52:47,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:52:47,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:52:47,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:52:47,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:52:47,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:52:47,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5d5e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47, skipping insertion in model container [2020-08-19 02:52:47,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:52:47,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:52:47,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:52:47,555 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:52:47,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:52:47,587 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:52:47,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47 WrapperNode [2020-08-19 02:52:47,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:52:47,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:52:47,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:52:47,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:52:47,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:52:47,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:52:47,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:52:47,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:52:47,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:52:47,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:52:47,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:52:47,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 02:52:47,773 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-19 02:52:47,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:52:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 02:52:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:52:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:52:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-19 02:52:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 02:52:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 02:52:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:52:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 02:52:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 02:52:47,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 02:52:47,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:52:47,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:52:48,080 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:52:48,080 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-19 02:52:48,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:52:48 BoogieIcfgContainer [2020-08-19 02:52:48,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:52:48,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:52:48,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:52:48,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:52:48,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:52:47" (1/3) ... [2020-08-19 02:52:48,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0e9c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:52:48, skipping insertion in model container [2020-08-19 02:52:48,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (2/3) ... [2020-08-19 02:52:48,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0e9c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:52:48, skipping insertion in model container [2020-08-19 02:52:48,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:52:48" (3/3) ... [2020-08-19 02:52:48,095 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-08-19 02:52:48,107 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:52:48,115 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:52:48,132 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:52:48,157 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:52:48,158 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:52:48,158 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:52:48,158 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:52:48,158 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:52:48,158 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:52:48,159 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:52:48,159 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:52:48,185 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 02:52:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 02:52:48,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:48,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:48,204 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:48,216 INFO L82 PathProgramCache]: Analyzing trace with hash -850547107, now seen corresponding path program 1 times [2020-08-19 02:52:48,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:48,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340080258] [2020-08-19 02:52:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:48,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:48,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:48,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340080258] [2020-08-19 02:52:48,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:52:48,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:52:48,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912486560] [2020-08-19 02:52:48,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:52:48,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:48,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:52:48,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:52:48,478 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-08-19 02:52:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:48,631 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-08-19 02:52:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:52:48,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-08-19 02:52:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:48,643 INFO L225 Difference]: With dead ends: 59 [2020-08-19 02:52:48,644 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 02:52:48,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:52:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 02:52:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-19 02:52:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 02:52:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-19 02:52:48,688 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-08-19 02:52:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:48,689 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-19 02:52:48,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:52:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-19 02:52:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 02:52:48,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:48,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:48,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:52:48,691 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:48,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1453375688, now seen corresponding path program 1 times [2020-08-19 02:52:48,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:48,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731456311] [2020-08-19 02:52:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:48,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:48,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:48,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731456311] [2020-08-19 02:52:48,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:52:48,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 02:52:48,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475685975] [2020-08-19 02:52:48,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:52:48,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:48,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:52:48,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:52:48,856 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-19 02:52:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:49,071 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-19 02:52:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:52:49,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-19 02:52:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:49,073 INFO L225 Difference]: With dead ends: 48 [2020-08-19 02:52:49,074 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 02:52:49,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:52:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 02:52:49,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-19 02:52:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-19 02:52:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-19 02:52:49,084 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-19 02:52:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:49,085 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-19 02:52:49,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:52:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-19 02:52:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:52:49,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:49,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:49,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:52:49,087 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:49,088 INFO L82 PathProgramCache]: Analyzing trace with hash -169907062, now seen corresponding path program 1 times [2020-08-19 02:52:49,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:49,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368090115] [2020-08-19 02:52:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:49,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368090115] [2020-08-19 02:52:49,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:49,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:52:49,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457149178] [2020-08-19 02:52:49,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:52:49,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:52:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:52:49,333 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-19 02:52:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:49,518 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-19 02:52:49,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:52:49,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-19 02:52:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:49,519 INFO L225 Difference]: With dead ends: 50 [2020-08-19 02:52:49,519 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 02:52:49,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:52:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 02:52:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-19 02:52:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-19 02:52:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-19 02:52:49,528 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-19 02:52:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:49,528 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-19 02:52:49,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:52:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-19 02:52:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 02:52:49,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:49,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:49,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:52:49,530 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:49,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:49,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1071501364, now seen corresponding path program 2 times [2020-08-19 02:52:49,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:49,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094786935] [2020-08-19 02:52:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:49,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094786935] [2020-08-19 02:52:49,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:49,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:52:49,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925752071] [2020-08-19 02:52:49,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:52:49,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:49,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:52:49,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:52:49,732 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-19 02:52:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:49,891 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-08-19 02:52:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:52:49,891 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-19 02:52:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:49,892 INFO L225 Difference]: With dead ends: 52 [2020-08-19 02:52:49,893 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 02:52:49,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:52:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 02:52:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-19 02:52:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 02:52:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-19 02:52:49,900 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-19 02:52:49,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:49,900 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-19 02:52:49,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:52:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-19 02:52:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 02:52:49,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:49,902 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:49,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:52:49,902 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash 79768206, now seen corresponding path program 3 times [2020-08-19 02:52:49,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:49,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007814409] [2020-08-19 02:52:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:50,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007814409] [2020-08-19 02:52:50,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:50,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:52:50,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228018613] [2020-08-19 02:52:50,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:52:50,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:50,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:52:50,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:52:50,129 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-19 02:52:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:50,325 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-08-19 02:52:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:52:50,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-19 02:52:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:50,327 INFO L225 Difference]: With dead ends: 54 [2020-08-19 02:52:50,327 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 02:52:50,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:52:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 02:52:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-19 02:52:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-19 02:52:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-19 02:52:50,334 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-19 02:52:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:50,334 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-19 02:52:50,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:52:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-19 02:52:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 02:52:50,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:50,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:50,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:52:50,336 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1651737392, now seen corresponding path program 4 times [2020-08-19 02:52:50,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:50,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334067166] [2020-08-19 02:52:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:50,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334067166] [2020-08-19 02:52:50,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:50,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:52:50,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203643290] [2020-08-19 02:52:50,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:52:50,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:52:50,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:52:50,572 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-19 02:52:50,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:50,741 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-19 02:52:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:52:50,741 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-19 02:52:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:50,742 INFO L225 Difference]: With dead ends: 56 [2020-08-19 02:52:50,742 INFO L226 Difference]: Without dead ends: 38 [2020-08-19 02:52:50,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:52:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-19 02:52:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-19 02:52:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 02:52:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-19 02:52:50,749 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-19 02:52:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:50,750 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-19 02:52:50,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:52:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-19 02:52:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 02:52:50,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:50,751 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:50,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:52:50,752 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:50,752 INFO L82 PathProgramCache]: Analyzing trace with hash 818693778, now seen corresponding path program 5 times [2020-08-19 02:52:50,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:50,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649820973] [2020-08-19 02:52:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:51,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649820973] [2020-08-19 02:52:51,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:51,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:52:51,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422164806] [2020-08-19 02:52:51,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:52:51,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:51,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:52:51,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:52:51,113 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-19 02:52:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:51,330 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-19 02:52:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:52:51,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-19 02:52:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:51,332 INFO L225 Difference]: With dead ends: 58 [2020-08-19 02:52:51,332 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 02:52:51,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:52:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 02:52:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-19 02:52:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 02:52:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-19 02:52:51,343 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-19 02:52:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:51,345 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-19 02:52:51,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:52:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-19 02:52:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 02:52:51,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:51,348 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:51,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:52:51,348 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:51,349 INFO L82 PathProgramCache]: Analyzing trace with hash -213866540, now seen corresponding path program 6 times [2020-08-19 02:52:51,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:51,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107151849] [2020-08-19 02:52:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:51,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107151849] [2020-08-19 02:52:51,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:51,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:52:51,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165555355] [2020-08-19 02:52:51,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:52:51,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:51,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:52:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:52:51,713 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-19 02:52:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:51,902 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-08-19 02:52:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:52:51,903 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-19 02:52:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:51,904 INFO L225 Difference]: With dead ends: 60 [2020-08-19 02:52:51,904 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 02:52:51,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:52:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 02:52:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-19 02:52:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-19 02:52:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-19 02:52:51,910 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-19 02:52:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:51,910 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-19 02:52:51,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:52:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-19 02:52:51,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 02:52:51,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:51,912 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:51,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:52:51,912 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:51,913 INFO L82 PathProgramCache]: Analyzing trace with hash -366886762, now seen corresponding path program 7 times [2020-08-19 02:52:51,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:51,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830521219] [2020-08-19 02:52:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:52,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830521219] [2020-08-19 02:52:52,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:52,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 02:52:52,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162495533] [2020-08-19 02:52:52,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 02:52:52,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:52,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 02:52:52,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:52:52,242 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-08-19 02:52:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:52,438 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-19 02:52:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 02:52:52,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-08-19 02:52:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:52,439 INFO L225 Difference]: With dead ends: 62 [2020-08-19 02:52:52,440 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 02:52:52,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:52:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 02:52:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-19 02:52:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 02:52:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-08-19 02:52:52,446 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-08-19 02:52:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:52,446 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-08-19 02:52:52,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 02:52:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-08-19 02:52:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-19 02:52:52,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:52,447 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:52,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:52:52,448 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1390432040, now seen corresponding path program 8 times [2020-08-19 02:52:52,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:52,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453957917] [2020-08-19 02:52:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:52,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453957917] [2020-08-19 02:52:52,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:52,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 02:52:52,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939749483] [2020-08-19 02:52:52,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 02:52:52,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 02:52:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:52:52,810 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-08-19 02:52:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:53,068 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-08-19 02:52:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 02:52:53,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-19 02:52:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:53,071 INFO L225 Difference]: With dead ends: 64 [2020-08-19 02:52:53,071 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 02:52:53,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:52:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 02:52:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-19 02:52:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 02:52:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-19 02:52:53,078 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-08-19 02:52:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:53,079 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-19 02:52:53,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 02:52:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-19 02:52:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 02:52:53,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:53,080 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:53,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:52:53,081 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1469933414, now seen corresponding path program 9 times [2020-08-19 02:52:53,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:53,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857818240] [2020-08-19 02:52:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-19 02:52:53,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857818240] [2020-08-19 02:52:53,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:52:53,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:52:53,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363447165] [2020-08-19 02:52:53,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:52:53,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:53,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:52:53,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:52:53,175 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-08-19 02:52:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:53,268 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-08-19 02:52:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:52:53,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-19 02:52:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:53,271 INFO L225 Difference]: With dead ends: 65 [2020-08-19 02:52:53,271 INFO L226 Difference]: Without dead ends: 53 [2020-08-19 02:52:53,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:52:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-19 02:52:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-08-19 02:52:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 02:52:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-19 02:52:53,282 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-08-19 02:52:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:53,282 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-19 02:52:53,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:52:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-19 02:52:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 02:52:53,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:53,283 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:53,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:52:53,283 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1568016950, now seen corresponding path program 1 times [2020-08-19 02:52:53,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:53,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201871284] [2020-08-19 02:52:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-19 02:52:53,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201871284] [2020-08-19 02:52:53,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:53,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:52:53,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113919226] [2020-08-19 02:52:53,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:52:53,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:53,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:52:53,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:52:53,351 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-08-19 02:52:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:53,447 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-08-19 02:52:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:52:53,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-19 02:52:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:53,449 INFO L225 Difference]: With dead ends: 73 [2020-08-19 02:52:53,450 INFO L226 Difference]: Without dead ends: 61 [2020-08-19 02:52:53,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:52:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-19 02:52:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-08-19 02:52:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-19 02:52:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-08-19 02:52:53,457 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 41 [2020-08-19 02:52:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:53,457 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-08-19 02:52:53,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:52:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-08-19 02:52:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 02:52:53,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:53,459 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:53,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:52:53,459 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:53,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1298090650, now seen corresponding path program 2 times [2020-08-19 02:52:53,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:53,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362109967] [2020-08-19 02:52:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-19 02:52:53,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362109967] [2020-08-19 02:52:53,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:52:53,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:52:53,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501324214] [2020-08-19 02:52:53,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:52:53,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:53,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:52:53,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:52:53,542 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-08-19 02:52:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:53,616 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-08-19 02:52:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:52:53,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-08-19 02:52:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:53,620 INFO L225 Difference]: With dead ends: 69 [2020-08-19 02:52:53,620 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 02:52:53,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:52:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 02:52:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-19 02:52:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-19 02:52:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-08-19 02:52:53,635 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-08-19 02:52:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:53,636 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-08-19 02:52:53,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:52:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-08-19 02:52:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 02:52:53,638 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:53,638 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:53,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:52:53,638 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:53,639 INFO L82 PathProgramCache]: Analyzing trace with hash 318257626, now seen corresponding path program 1 times [2020-08-19 02:52:53,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:53,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828087372] [2020-08-19 02:52:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:52:54,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828087372] [2020-08-19 02:52:54,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:54,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 02:52:54,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907321171] [2020-08-19 02:52:54,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 02:52:54,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:54,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 02:52:54,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:52:54,121 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 15 states. [2020-08-19 02:52:54,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:54,350 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-08-19 02:52:54,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 02:52:54,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-08-19 02:52:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:54,352 INFO L225 Difference]: With dead ends: 74 [2020-08-19 02:52:54,352 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 02:52:54,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:52:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 02:52:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-19 02:52:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 02:52:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-19 02:52:54,359 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-08-19 02:52:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:54,359 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-19 02:52:54,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 02:52:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-19 02:52:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 02:52:54,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:54,360 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:54,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:52:54,361 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash -935313508, now seen corresponding path program 2 times [2020-08-19 02:52:54,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:54,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904770542] [2020-08-19 02:52:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:54,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:54,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:52:54,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904770542] [2020-08-19 02:52:54,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:54,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 02:52:54,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460567853] [2020-08-19 02:52:54,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 02:52:54,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 02:52:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:52:54,851 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-08-19 02:52:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:55,093 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-08-19 02:52:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 02:52:55,093 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-08-19 02:52:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:55,094 INFO L225 Difference]: With dead ends: 76 [2020-08-19 02:52:55,094 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 02:52:55,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:52:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 02:52:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-19 02:52:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-19 02:52:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-08-19 02:52:55,100 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-08-19 02:52:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:55,100 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-08-19 02:52:55,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 02:52:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-08-19 02:52:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 02:52:55,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:55,102 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:55,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 02:52:55,102 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1268636894, now seen corresponding path program 3 times [2020-08-19 02:52:55,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:55,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154224107] [2020-08-19 02:52:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:55,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:55,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:52:55,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154224107] [2020-08-19 02:52:55,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:55,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 02:52:55,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777728682] [2020-08-19 02:52:55,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 02:52:55,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:55,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 02:52:55,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:52:55,682 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-08-19 02:52:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:55,941 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-08-19 02:52:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 02:52:55,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-08-19 02:52:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:55,943 INFO L225 Difference]: With dead ends: 78 [2020-08-19 02:52:55,943 INFO L226 Difference]: Without dead ends: 56 [2020-08-19 02:52:55,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2020-08-19 02:52:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-19 02:52:55,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-19 02:52:55,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 02:52:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-19 02:52:55,959 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-08-19 02:52:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:55,960 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-19 02:52:55,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 02:52:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-19 02:52:55,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 02:52:55,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:55,960 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:55,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 02:52:55,961 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1846096288, now seen corresponding path program 4 times [2020-08-19 02:52:55,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:55,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284824351] [2020-08-19 02:52:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:56,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:56,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:52:56,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284824351] [2020-08-19 02:52:56,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:56,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 02:52:56,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830560411] [2020-08-19 02:52:56,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 02:52:56,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 02:52:56,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:52:56,579 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-08-19 02:52:56,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:56,859 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-08-19 02:52:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 02:52:56,860 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-19 02:52:56,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:56,861 INFO L225 Difference]: With dead ends: 80 [2020-08-19 02:52:56,861 INFO L226 Difference]: Without dead ends: 58 [2020-08-19 02:52:56,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:52:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-19 02:52:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-19 02:52:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 02:52:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-08-19 02:52:56,868 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-08-19 02:52:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:56,868 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-08-19 02:52:56,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 02:52:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-08-19 02:52:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 02:52:56,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:56,869 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:56,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 02:52:56,870 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:56,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1561174558, now seen corresponding path program 5 times [2020-08-19 02:52:56,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:56,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512755828] [2020-08-19 02:52:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:56,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:56,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:52:57,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512755828] [2020-08-19 02:52:57,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:57,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 02:52:57,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080202233] [2020-08-19 02:52:57,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 02:52:57,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:57,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 02:52:57,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:52:57,474 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 19 states. [2020-08-19 02:52:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:57,743 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-08-19 02:52:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 02:52:57,750 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-08-19 02:52:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:57,751 INFO L225 Difference]: With dead ends: 82 [2020-08-19 02:52:57,751 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 02:52:57,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2020-08-19 02:52:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 02:52:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-19 02:52:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-19 02:52:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-19 02:52:57,756 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-08-19 02:52:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:57,756 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-19 02:52:57,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 02:52:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-19 02:52:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 02:52:57,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:57,757 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:57,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 02:52:57,757 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1111589284, now seen corresponding path program 6 times [2020-08-19 02:52:57,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:57,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91779762] [2020-08-19 02:52:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:57,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:57,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:52:58,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91779762] [2020-08-19 02:52:58,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:58,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 02:52:58,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831616837] [2020-08-19 02:52:58,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 02:52:58,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:58,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 02:52:58,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-08-19 02:52:58,455 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 20 states. [2020-08-19 02:52:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:58,758 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-08-19 02:52:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 02:52:58,759 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-08-19 02:52:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:58,760 INFO L225 Difference]: With dead ends: 84 [2020-08-19 02:52:58,760 INFO L226 Difference]: Without dead ends: 62 [2020-08-19 02:52:58,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2020-08-19 02:52:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-19 02:52:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-19 02:52:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 02:52:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-08-19 02:52:58,766 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-08-19 02:52:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:58,766 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-08-19 02:52:58,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 02:52:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-08-19 02:52:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 02:52:58,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:58,767 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:58,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 02:52:58,768 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:58,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1247198438, now seen corresponding path program 7 times [2020-08-19 02:52:58,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:58,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853272990] [2020-08-19 02:52:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:58,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:58,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:52:59,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853272990] [2020-08-19 02:52:59,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:59,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 02:52:59,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354150502] [2020-08-19 02:52:59,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 02:52:59,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:59,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 02:52:59,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:52:59,539 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 21 states. [2020-08-19 02:52:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:59,756 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-08-19 02:52:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 02:52:59,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-08-19 02:52:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:59,757 INFO L225 Difference]: With dead ends: 86 [2020-08-19 02:52:59,757 INFO L226 Difference]: Without dead ends: 64 [2020-08-19 02:52:59,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:52:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-19 02:52:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-19 02:52:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 02:52:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-08-19 02:52:59,764 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-08-19 02:52:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:59,764 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-08-19 02:52:59,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 02:52:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-08-19 02:52:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 02:52:59,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:59,765 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:59,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 02:52:59,766 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:59,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:59,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1576390744, now seen corresponding path program 8 times [2020-08-19 02:52:59,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:59,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691376701] [2020-08-19 02:52:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:59,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:59,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:52:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:00,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691376701] [2020-08-19 02:53:00,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:00,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 02:53:00,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852488460] [2020-08-19 02:53:00,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 02:53:00,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:00,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 02:53:00,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-08-19 02:53:00,693 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-08-19 02:53:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:00,986 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-08-19 02:53:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 02:53:00,986 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-19 02:53:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:00,987 INFO L225 Difference]: With dead ends: 88 [2020-08-19 02:53:00,988 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 02:53:00,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2020-08-19 02:53:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 02:53:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-19 02:53:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-19 02:53:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-08-19 02:53:00,994 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-08-19 02:53:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:00,994 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-08-19 02:53:00,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 02:53:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-08-19 02:53:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 02:53:00,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:00,995 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:00,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 02:53:00,996 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:00,996 INFO L82 PathProgramCache]: Analyzing trace with hash -626263574, now seen corresponding path program 9 times [2020-08-19 02:53:00,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:00,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347809507] [2020-08-19 02:53:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:01,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:01,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:01,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347809507] [2020-08-19 02:53:01,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:01,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 02:53:01,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172700926] [2020-08-19 02:53:01,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 02:53:01,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:01,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 02:53:01,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-08-19 02:53:01,896 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 23 states. [2020-08-19 02:53:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:02,213 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-08-19 02:53:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 02:53:02,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-08-19 02:53:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:02,216 INFO L225 Difference]: With dead ends: 90 [2020-08-19 02:53:02,216 INFO L226 Difference]: Without dead ends: 68 [2020-08-19 02:53:02,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:53:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-19 02:53:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-19 02:53:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 02:53:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-08-19 02:53:02,222 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-08-19 02:53:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:02,222 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-08-19 02:53:02,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 02:53:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-08-19 02:53:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 02:53:02,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:02,223 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:02,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 02:53:02,223 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:02,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:02,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1912880044, now seen corresponding path program 10 times [2020-08-19 02:53:02,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:02,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321758917] [2020-08-19 02:53:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:02,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:02,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:03,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321758917] [2020-08-19 02:53:03,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:03,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 02:53:03,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447578182] [2020-08-19 02:53:03,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 02:53:03,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 02:53:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:53:03,135 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2020-08-19 02:53:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:03,418 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-08-19 02:53:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 02:53:03,419 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-08-19 02:53:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:03,420 INFO L225 Difference]: With dead ends: 92 [2020-08-19 02:53:03,421 INFO L226 Difference]: Without dead ends: 70 [2020-08-19 02:53:03,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=436, Unknown=0, NotChecked=0, Total=702 [2020-08-19 02:53:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-19 02:53:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-19 02:53:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 02:53:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-08-19 02:53:03,427 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-08-19 02:53:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:03,428 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-08-19 02:53:03,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 02:53:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-08-19 02:53:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-19 02:53:03,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:03,429 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:03,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 02:53:03,429 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1806494482, now seen corresponding path program 11 times [2020-08-19 02:53:03,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:03,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591080771] [2020-08-19 02:53:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:03,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:03,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:04,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591080771] [2020-08-19 02:53:04,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:04,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 02:53:04,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275199025] [2020-08-19 02:53:04,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 02:53:04,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:04,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 02:53:04,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-08-19 02:53:04,454 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 25 states. [2020-08-19 02:53:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:04,788 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-08-19 02:53:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 02:53:04,789 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-08-19 02:53:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:04,790 INFO L225 Difference]: With dead ends: 94 [2020-08-19 02:53:04,790 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 02:53:04,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2020-08-19 02:53:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 02:53:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-19 02:53:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 02:53:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-08-19 02:53:04,795 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-08-19 02:53:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:04,796 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-08-19 02:53:04,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 02:53:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-08-19 02:53:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 02:53:04,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:04,797 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:04,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 02:53:04,797 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1582343600, now seen corresponding path program 12 times [2020-08-19 02:53:04,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:04,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391602142] [2020-08-19 02:53:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:04,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:04,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:05,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391602142] [2020-08-19 02:53:05,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:05,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 02:53:05,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875716113] [2020-08-19 02:53:05,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 02:53:05,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:05,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 02:53:05,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:53:05,824 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 26 states. [2020-08-19 02:53:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:06,209 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-08-19 02:53:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 02:53:06,210 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-08-19 02:53:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:06,211 INFO L225 Difference]: With dead ends: 96 [2020-08-19 02:53:06,211 INFO L226 Difference]: Without dead ends: 74 [2020-08-19 02:53:06,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2020-08-19 02:53:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-19 02:53:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-19 02:53:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 02:53:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-08-19 02:53:06,216 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-08-19 02:53:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:06,216 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-08-19 02:53:06,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 02:53:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-08-19 02:53:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 02:53:06,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:06,217 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:06,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 02:53:06,217 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1624437262, now seen corresponding path program 13 times [2020-08-19 02:53:06,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:06,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556911686] [2020-08-19 02:53:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:06,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:06,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:07,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556911686] [2020-08-19 02:53:07,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:07,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 02:53:07,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999275078] [2020-08-19 02:53:07,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 02:53:07,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:07,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 02:53:07,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-08-19 02:53:07,286 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 27 states. [2020-08-19 02:53:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:07,523 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-08-19 02:53:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 02:53:07,524 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-08-19 02:53:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:07,524 INFO L225 Difference]: With dead ends: 98 [2020-08-19 02:53:07,525 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 02:53:07,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2020-08-19 02:53:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 02:53:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-19 02:53:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-19 02:53:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-08-19 02:53:07,531 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-08-19 02:53:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:07,531 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-08-19 02:53:07,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 02:53:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-08-19 02:53:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 02:53:07,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:07,533 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:07,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 02:53:07,533 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash 445672884, now seen corresponding path program 14 times [2020-08-19 02:53:07,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:07,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058563796] [2020-08-19 02:53:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:07,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:07,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:08,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058563796] [2020-08-19 02:53:08,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:08,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 02:53:08,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128450416] [2020-08-19 02:53:08,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 02:53:08,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:08,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 02:53:08,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-08-19 02:53:08,880 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-08-19 02:53:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:09,230 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-08-19 02:53:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 02:53:09,231 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-08-19 02:53:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:09,232 INFO L225 Difference]: With dead ends: 100 [2020-08-19 02:53:09,232 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 02:53:09,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2020-08-19 02:53:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 02:53:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-19 02:53:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-19 02:53:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-08-19 02:53:09,238 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-08-19 02:53:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:09,239 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-08-19 02:53:09,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 02:53:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-08-19 02:53:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 02:53:09,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:09,240 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:09,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 02:53:09,240 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1251665142, now seen corresponding path program 15 times [2020-08-19 02:53:09,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:09,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428161346] [2020-08-19 02:53:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:09,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:09,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:10,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428161346] [2020-08-19 02:53:10,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:10,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 02:53:10,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693413235] [2020-08-19 02:53:10,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 02:53:10,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:10,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 02:53:10,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-08-19 02:53:10,547 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 29 states. [2020-08-19 02:53:10,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:10,922 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-08-19 02:53:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 02:53:10,923 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-08-19 02:53:10,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:10,924 INFO L225 Difference]: With dead ends: 102 [2020-08-19 02:53:10,924 INFO L226 Difference]: Without dead ends: 80 [2020-08-19 02:53:10,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-08-19 02:53:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-19 02:53:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-19 02:53:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 02:53:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-19 02:53:10,929 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-08-19 02:53:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:10,929 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-19 02:53:10,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 02:53:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-19 02:53:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-19 02:53:10,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:10,930 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:10,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 02:53:10,931 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1578855496, now seen corresponding path program 16 times [2020-08-19 02:53:10,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:10,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508593081] [2020-08-19 02:53:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:10,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:10,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:12,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508593081] [2020-08-19 02:53:12,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:12,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 02:53:12,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603662253] [2020-08-19 02:53:12,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 02:53:12,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:12,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 02:53:12,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-08-19 02:53:12,271 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2020-08-19 02:53:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:12,618 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-08-19 02:53:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-19 02:53:12,619 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-08-19 02:53:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:12,619 INFO L225 Difference]: With dead ends: 104 [2020-08-19 02:53:12,620 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 02:53:12,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 02:53:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 02:53:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-19 02:53:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 02:53:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-08-19 02:53:12,629 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-08-19 02:53:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:12,629 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-08-19 02:53:12,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 02:53:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-08-19 02:53:12,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-19 02:53:12,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:12,630 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:12,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 02:53:12,630 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:12,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1300077050, now seen corresponding path program 17 times [2020-08-19 02:53:12,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:12,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667590659] [2020-08-19 02:53:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:12,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:12,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:13,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667590659] [2020-08-19 02:53:13,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:13,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-19 02:53:13,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588864493] [2020-08-19 02:53:13,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-19 02:53:13,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:13,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-19 02:53:13,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-19 02:53:13,972 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 31 states. [2020-08-19 02:53:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:14,379 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-08-19 02:53:14,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-19 02:53:14,379 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-08-19 02:53:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:14,380 INFO L225 Difference]: With dead ends: 106 [2020-08-19 02:53:14,380 INFO L226 Difference]: Without dead ends: 84 [2020-08-19 02:53:14,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=448, Invalid=674, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 02:53:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-19 02:53:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-19 02:53:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 02:53:14,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-08-19 02:53:14,387 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-08-19 02:53:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:14,388 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-08-19 02:53:14,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-19 02:53:14,388 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-08-19 02:53:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 02:53:14,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:14,389 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:14,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 02:53:14,389 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1995315132, now seen corresponding path program 18 times [2020-08-19 02:53:14,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:14,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311389842] [2020-08-19 02:53:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:14,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:14,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:15,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311389842] [2020-08-19 02:53:15,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:15,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-19 02:53:15,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413211677] [2020-08-19 02:53:15,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-19 02:53:15,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:15,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-19 02:53:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-08-19 02:53:15,911 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 32 states. [2020-08-19 02:53:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:16,340 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-08-19 02:53:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 02:53:16,341 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-08-19 02:53:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:16,342 INFO L225 Difference]: With dead ends: 108 [2020-08-19 02:53:16,342 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 02:53:16,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 02:53:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 02:53:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-19 02:53:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-19 02:53:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-08-19 02:53:16,347 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-08-19 02:53:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:16,347 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-08-19 02:53:16,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-19 02:53:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-08-19 02:53:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-19 02:53:16,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:16,348 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:16,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 02:53:16,348 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash 104213758, now seen corresponding path program 19 times [2020-08-19 02:53:16,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:16,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292530977] [2020-08-19 02:53:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:16,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:16,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:17,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292530977] [2020-08-19 02:53:17,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:17,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-19 02:53:17,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201951460] [2020-08-19 02:53:17,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-19 02:53:17,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:17,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-19 02:53:17,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 02:53:17,888 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 33 states. [2020-08-19 02:53:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:18,345 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-08-19 02:53:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 02:53:18,346 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-08-19 02:53:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:18,347 INFO L225 Difference]: With dead ends: 110 [2020-08-19 02:53:18,347 INFO L226 Difference]: Without dead ends: 88 [2020-08-19 02:53:18,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-08-19 02:53:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-19 02:53:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-19 02:53:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 02:53:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-08-19 02:53:18,356 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-08-19 02:53:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:18,357 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-08-19 02:53:18,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-19 02:53:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-08-19 02:53:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 02:53:18,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:18,358 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:18,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 02:53:18,359 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:18,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:18,359 INFO L82 PathProgramCache]: Analyzing trace with hash -473040448, now seen corresponding path program 20 times [2020-08-19 02:53:18,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:18,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753941580] [2020-08-19 02:53:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:18,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:18,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:19,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753941580] [2020-08-19 02:53:19,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:19,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-19 02:53:19,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641292271] [2020-08-19 02:53:19,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-19 02:53:19,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:19,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-19 02:53:19,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 02:53:19,977 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 34 states. [2020-08-19 02:53:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:20,437 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-08-19 02:53:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-19 02:53:20,437 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-08-19 02:53:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:20,438 INFO L225 Difference]: With dead ends: 112 [2020-08-19 02:53:20,439 INFO L226 Difference]: Without dead ends: 90 [2020-08-19 02:53:20,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 02:53:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-19 02:53:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-19 02:53:20,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 02:53:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-08-19 02:53:20,444 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-08-19 02:53:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:20,444 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-08-19 02:53:20,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-19 02:53:20,444 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-08-19 02:53:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-19 02:53:20,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:20,445 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:20,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 02:53:20,445 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:20,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1163551230, now seen corresponding path program 21 times [2020-08-19 02:53:20,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:20,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706345016] [2020-08-19 02:53:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:20,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:20,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:22,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706345016] [2020-08-19 02:53:22,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:22,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-19 02:53:22,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933911984] [2020-08-19 02:53:22,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-19 02:53:22,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-19 02:53:22,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 02:53:22,159 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 35 states. [2020-08-19 02:53:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:22,663 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-08-19 02:53:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-19 02:53:22,664 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-08-19 02:53:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:22,665 INFO L225 Difference]: With dead ends: 114 [2020-08-19 02:53:22,665 INFO L226 Difference]: Without dead ends: 92 [2020-08-19 02:53:22,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=574, Invalid=832, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 02:53:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-19 02:53:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-19 02:53:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 02:53:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-08-19 02:53:22,675 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-08-19 02:53:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:22,676 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-08-19 02:53:22,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-19 02:53:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-08-19 02:53:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 02:53:22,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:22,679 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:22,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-19 02:53:22,680 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:22,680 INFO L82 PathProgramCache]: Analyzing trace with hash 975518148, now seen corresponding path program 22 times [2020-08-19 02:53:22,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:22,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527141659] [2020-08-19 02:53:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:22,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:22,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:24,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527141659] [2020-08-19 02:53:24,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:24,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-19 02:53:24,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981043734] [2020-08-19 02:53:24,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-19 02:53:24,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:24,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-19 02:53:24,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-08-19 02:53:24,483 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 36 states. [2020-08-19 02:53:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:24,832 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-08-19 02:53:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-19 02:53:24,833 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-08-19 02:53:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:24,834 INFO L225 Difference]: With dead ends: 116 [2020-08-19 02:53:24,835 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 02:53:24,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 02:53:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 02:53:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-19 02:53:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-19 02:53:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-08-19 02:53:24,841 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-08-19 02:53:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:24,841 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-08-19 02:53:24,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-19 02:53:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-08-19 02:53:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-19 02:53:24,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:24,842 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:24,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-19 02:53:24,842 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:24,843 INFO L82 PathProgramCache]: Analyzing trace with hash -668144378, now seen corresponding path program 23 times [2020-08-19 02:53:24,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:24,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835769504] [2020-08-19 02:53:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:24,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:24,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:26,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835769504] [2020-08-19 02:53:26,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:26,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-19 02:53:26,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664084686] [2020-08-19 02:53:26,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-19 02:53:26,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:26,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-19 02:53:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 02:53:26,754 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 37 states. [2020-08-19 02:53:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:27,240 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-08-19 02:53:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-19 02:53:27,241 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-08-19 02:53:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:27,242 INFO L225 Difference]: With dead ends: 118 [2020-08-19 02:53:27,243 INFO L226 Difference]: Without dead ends: 96 [2020-08-19 02:53:27,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=643, Invalid=917, Unknown=0, NotChecked=0, Total=1560 [2020-08-19 02:53:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-19 02:53:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-19 02:53:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 02:53:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-08-19 02:53:27,248 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-08-19 02:53:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:27,249 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-08-19 02:53:27,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-19 02:53:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-08-19 02:53:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-19 02:53:27,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:27,250 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:27,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-19 02:53:27,250 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash 320133064, now seen corresponding path program 24 times [2020-08-19 02:53:27,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:27,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128397875] [2020-08-19 02:53:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:29,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128397875] [2020-08-19 02:53:29,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:29,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-19 02:53:29,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910141930] [2020-08-19 02:53:29,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-19 02:53:29,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:29,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-19 02:53:29,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 02:53:29,210 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 38 states. [2020-08-19 02:53:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:29,652 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-08-19 02:53:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-19 02:53:29,653 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-08-19 02:53:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:29,654 INFO L225 Difference]: With dead ends: 120 [2020-08-19 02:53:29,654 INFO L226 Difference]: Without dead ends: 98 [2020-08-19 02:53:29,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=679, Invalid=961, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 02:53:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-19 02:53:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-19 02:53:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-19 02:53:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-08-19 02:53:29,661 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-08-19 02:53:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:29,662 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-08-19 02:53:29,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-19 02:53:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-08-19 02:53:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-19 02:53:29,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:29,663 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:29,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-19 02:53:29,663 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash 866982410, now seen corresponding path program 25 times [2020-08-19 02:53:29,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:29,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738365617] [2020-08-19 02:53:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:29,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:29,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:31,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738365617] [2020-08-19 02:53:31,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:31,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-19 02:53:31,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094927219] [2020-08-19 02:53:31,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-19 02:53:31,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-19 02:53:31,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 02:53:31,777 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 39 states. [2020-08-19 02:53:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:32,122 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-08-19 02:53:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-19 02:53:32,123 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-08-19 02:53:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:32,127 INFO L225 Difference]: With dead ends: 122 [2020-08-19 02:53:32,127 INFO L226 Difference]: Without dead ends: 100 [2020-08-19 02:53:32,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=716, Invalid=1006, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 02:53:32,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-19 02:53:32,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-19 02:53:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-19 02:53:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-08-19 02:53:32,132 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-08-19 02:53:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:32,133 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-08-19 02:53:32,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-19 02:53:32,133 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-08-19 02:53:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-19 02:53:32,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:32,134 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:32,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-19 02:53:32,134 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:32,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:32,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1891773492, now seen corresponding path program 26 times [2020-08-19 02:53:32,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:32,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132758976] [2020-08-19 02:53:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:32,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:32,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:34,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132758976] [2020-08-19 02:53:34,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:34,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-19 02:53:34,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872454309] [2020-08-19 02:53:34,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-19 02:53:34,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-19 02:53:34,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-08-19 02:53:34,292 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 40 states. [2020-08-19 02:53:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:34,616 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-08-19 02:53:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-19 02:53:34,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-08-19 02:53:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:34,618 INFO L225 Difference]: With dead ends: 124 [2020-08-19 02:53:34,618 INFO L226 Difference]: Without dead ends: 102 [2020-08-19 02:53:34,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=754, Invalid=1052, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 02:53:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-19 02:53:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-19 02:53:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 02:53:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-08-19 02:53:34,625 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-08-19 02:53:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:34,625 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-08-19 02:53:34,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-19 02:53:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-08-19 02:53:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-19 02:53:34,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:34,626 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:34,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-19 02:53:34,627 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:34,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1233593614, now seen corresponding path program 27 times [2020-08-19 02:53:34,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:34,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669494487] [2020-08-19 02:53:34,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:34,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:34,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:36,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669494487] [2020-08-19 02:53:36,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:36,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-19 02:53:36,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593855773] [2020-08-19 02:53:36,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-19 02:53:36,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-19 02:53:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 02:53:36,989 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 41 states. [2020-08-19 02:53:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:37,340 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-08-19 02:53:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-19 02:53:37,341 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-08-19 02:53:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:37,342 INFO L225 Difference]: With dead ends: 126 [2020-08-19 02:53:37,342 INFO L226 Difference]: Without dead ends: 104 [2020-08-19 02:53:37,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-08-19 02:53:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-19 02:53:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-19 02:53:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-19 02:53:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-08-19 02:53:37,349 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-08-19 02:53:37,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:37,349 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-08-19 02:53:37,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-19 02:53:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-08-19 02:53:37,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 02:53:37,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:37,350 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:37,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-19 02:53:37,350 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:37,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1765724720, now seen corresponding path program 28 times [2020-08-19 02:53:37,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:37,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518156222] [2020-08-19 02:53:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:37,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:37,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:39,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518156222] [2020-08-19 02:53:39,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:39,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-19 02:53:39,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714953514] [2020-08-19 02:53:39,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-19 02:53:39,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:39,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-19 02:53:39,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 02:53:39,761 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 42 states. [2020-08-19 02:53:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:40,228 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-08-19 02:53:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-19 02:53:40,229 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-08-19 02:53:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:40,230 INFO L225 Difference]: With dead ends: 128 [2020-08-19 02:53:40,230 INFO L226 Difference]: Without dead ends: 106 [2020-08-19 02:53:40,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=833, Invalid=1147, Unknown=0, NotChecked=0, Total=1980 [2020-08-19 02:53:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-19 02:53:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-19 02:53:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-19 02:53:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-08-19 02:53:40,237 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-08-19 02:53:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:40,238 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-08-19 02:53:40,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-19 02:53:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-08-19 02:53:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-19 02:53:40,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:40,239 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:40,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-19 02:53:40,239 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2107379218, now seen corresponding path program 29 times [2020-08-19 02:53:40,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:40,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166213199] [2020-08-19 02:53:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:40,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:40,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 02:53:42,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166213199] [2020-08-19 02:53:42,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:42,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-19 02:53:42,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186015361] [2020-08-19 02:53:42,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-19 02:53:42,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:42,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-19 02:53:42,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 02:53:42,714 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 43 states. [2020-08-19 02:53:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:43,289 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-08-19 02:53:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-19 02:53:43,289 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-08-19 02:53:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:43,290 INFO L225 Difference]: With dead ends: 130 [2020-08-19 02:53:43,291 INFO L226 Difference]: Without dead ends: 108 [2020-08-19 02:53:43,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=874, Invalid=1196, Unknown=0, NotChecked=0, Total=2070 [2020-08-19 02:53:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-19 02:53:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-08-19 02:53:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 02:53:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-08-19 02:53:43,296 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-08-19 02:53:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:43,296 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-08-19 02:53:43,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-19 02:53:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-08-19 02:53:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-19 02:53:43,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:43,297 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:43,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-19 02:53:43,298 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:43,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:43,298 INFO L82 PathProgramCache]: Analyzing trace with hash 423618004, now seen corresponding path program 30 times [2020-08-19 02:53:43,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:43,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257143997] [2020-08-19 02:53:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:43,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:43,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 02:53:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat